# Showing 1–50 of 126 results for author: Matsumura, T

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1. arXiv:1801.06987  [pdf, other

The LiteBIRD Satellite Mission - Sub-Kelvin Instrument

Authors: A. Suzuki, P. A. R. Ade, Y. Akiba, D. Alonso, K. Arnold, J. Aumont, C. Baccigalupi, D. Barron, S. Basak, S. Beckman, J. Borrill, F. Boulanger, M. Bucher, E. Calabrese, Y. Chinone, H-M. Cho, A. Cukierman, D. W. Curtis, T. de Haan, M. Dobbs, A. Dominjon, T. Dotani, L. Duband, A. Ducout, J. Dunkley , et al. (127 additional authors not shown)

Abstract: Inflation is the leading theory of the first instant of the universe. Inflation, which postulates that the universe underwent a period of rapid expansion an instant after its birth, provides convincing explanation for cosmological observations. Recent advancements in detector technology have opened opportunities to explore primordial gravitational waves generated by the inflation through B-mode (d… ▽ More

Submitted 15 March, 2018; v1 submitted 22 January, 2018; originally announced January 2018.

Comments: 7 pages 2 figures Journal of Low Temperature Physics - Special edition - LTD17 Proceeding

2. arXiv:1712.05139  [pdf, ps, other

A wide field-of-view crossed Dragone optical system using the anamorphic aspherical surfaces

Abstract: A side-fed crossed Dragone telescope provides a wide field-of-view. This type of a telescope is commonly employed in the measurement of cosmic microwave background (CMB) polarization, which requires an image-space telecentric telescope with a large focal plane over broadband coverage. We report the design of the wide field-of-view crossed Dragone optical system using the anamorphic aspherical surf… ▽ More

Submitted 14 December, 2017; originally announced December 2017.

Comments: 7 pages, 10 figures, submitted to Applied Optics

3. arXiv:1711.00147  [pdf, ps, other

A tableau formula of double Grothendieck polynomials for $321$-avoiding permutations

Authors: Tomoo Matsumura

Abstract: In this article, we prove a tableau formula for the double Grothendieck polynomials associated to $321$-avoiding permutations. The proof is based on the compatibility of the formula with the $K$-theoretic divided difference operators. ▽ More

Submitted 31 October, 2017; originally announced November 2017.

4. arXiv:1710.07093  [pdf, ps, other

Symplectic and odd orthogonal Pfaffian formulas for algebraic cobordism

Authors: Thomas Hudson, Tomoo Matsumura

Abstract: In this paper we provide generalisations of Pfaffian formulas for the degeneracy loci classes in the algebraic cobordism of symplectic/odd orthogonal Grassmann bundles. ▽ More

Submitted 19 October, 2017; originally announced October 2017.

MSC Class: (Primary) 14M15; 55N22; (Secondary) 05E05; 14C17;

5. arXiv:1709.08382  [pdf, ps, other

Chiral Soliton Lattice Formation in Monoaxial Helimagnet Yb(Ni$_{1-x}$Cu$_x$)$_3$Al$_9$

Abstract: Helical magnetic structures and its responses to external magnetic fields in Yb(Ni$_x$Cu$_{1-x}$)$_3$Al$_9$, with a chiral crystal structure of the space group $R32$, have been investigated by resonant X-ray diffraction. It is shown that the crystal chirality is reflected to the helicity of the magnetic structure by a one to one relationship, indicating that there exists an antisymmetric exchange… ▽ More

Submitted 25 September, 2017; originally announced September 2017.

Comments: 13 pages, 18 figures, accepted for publication in J. Phys. Soc. Jpn

Journal ref: J. Phys. Soc. Jpn. 86, 124702 (2017)

6. arXiv:1708.03086  [pdf, ps, other

Temperature-Dependent Cycloidal Magnetic Structure in GdRu$_{2}$Al$_{10}$ Studied by Resonant X-ray Diffraction

Abstract: We have performed resonant X-ray diffraction experiments on the antiferromagnet GdRu$_{2}$Al$_{10}$ and have clarified that the magnetic structure in the ordered state is cycloidal with the moments lying in the $bc$ plane and propagating along the $b$ axis. The propagation vector shows a similar temperature dependence to the magnetic order parameter, which can be interpreted as being associated wi… ▽ More

Submitted 10 August, 2017; originally announced August 2017.

Comments: 8 pages, 11 figures, accepted for publication in J. Phys. Soc. Jpn

Journal ref: J. Phys. Soc. Jpn. 86, 094709 (2017)

7. arXiv:1706.09486  [pdf, other

Bandpass mismatch error for satellite CMB experiments I: Estimating the spurious signal

Abstract: Future Cosmic Microwave Background (CMB) satellite missions aim to use the $B$ mode polarization to measure the tensor-to-scalar ratio $r$ with a sensitivity of about $10^{-3}$. Achieving this goal will not only require sufficient detector array sensitivity but also unprecedented control of all systematic errors inherent to CMB polarization measurements. Since polarization measurements derive from… ▽ More

Submitted 20 November, 2017; v1 submitted 28 June, 2017; originally announced June 2017.

Comments: 27 pages, 17 figures, submitted to JCAP

8. arXiv:1705.02907  [pdf, other

A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data

Authors: The POLARBEAR Collaboration, P. A. R. Ade, M. Aguilar, Y. Akiba, K. Arnold, C. Baccigalupi, D. Barron, D. Beck, F. Bianchini, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, K. Crowley, A. Cukierman, M. Dobbs, A. Ducout, R. Dünner, T. Elleflot, J. Errard, G. Fabbian, S. M. Feeney, C. Feng, T. Fujino, N. Galitzki , et al. (57 additional authors not shown)

Abstract: We report an improved measurement of the cosmic microwave background (CMB) $B$-mode polarization power spectrum with the POLARBEAR experiment at 150 GHz. By adding new data collected during the second season of observations (2013-2014) to re-analyzed data from the first season (2012-2013), we have reduced twofold the band-power uncertainties. The band powers are reported over angular multipoles… ▽ More

Submitted 27 October, 2017; v1 submitted 8 May, 2017; originally announced May 2017.

Comments: 16 pages, 10 figures. Minor changes to match the published version. For data and figures, see http://bolo.berkeley.edu/polarbear/data/polarbear_BB_2017/

Journal ref: The Astrophysical Journal, 848:141, 2017

9. arXiv:1705.00747  [pdf, ps, other

Anomalous ^{125}Te Nuclear Spin Relaxation Coincident with Charge Kondo Behavior in Superconducting Pb_{1-x}Tl_{x}Te

Abstract: We report a ^{125}Te-NMR study of single-crystalline Pb_{1-x}Tl_{x}Te for x= 0 (undoped non-superconducting "parent"), 0.35 at% (doped but on the borderline of superconductivity), and 1.0 at% (superconducting, with a critical temperature Tc ~ 1.0 K). The Knight shift in the normal state is enhanced as x increases, corresponding to an increase in the average density of states (DOS). The NMR line-wi… ▽ More

Submitted 24 January, 2018; v1 submitted 1 May, 2017; originally announced May 2017.

Journal ref: J. Phys. Soc. Jpn., 87, 023706 (2018)

10. arXiv:1703.03847  [pdf, other

The EBEX Balloon Borne Experiment - Optics, Receiver, and Polarimetry

Abstract: The E and B Experiment (EBEX) was a long-duration balloon-borne cosmic microwave background polarimeter that flew over Antarctica in 2013. We describe the experiment's optical system, receiver, and polarimetric approach, and report on their in-flight performance. EBEX had three frequency bands centered on 150, 250, and 410 GHz. To make efficient use of limited mass and space we designed a 115 cm… ▽ More

Submitted 30 May, 2017; v1 submitted 10 March, 2017; originally announced March 2017.

Comments: 49 pages, 32 figures, submitted to The Astrophysical Journal Supplement

11. arXiv:1702.07111  [pdf, other

Performance of a continuously rotating half-wave plate on the POLARBEAR telescope

Abstract: A continuously rotating half-wave plate (CRHWP) is a promising tool to improve the sensitivity to large angular scales in cosmic microwave background (CMB) polarization measurements. With a CRHWP, single detectors can measure three of the Stokes parameters, $I$, $Q$ and $U$, thereby avoiding the set of systematic errors that can be introduced by mismatches in the properties of orthogonal detector… ▽ More

Submitted 27 May, 2017; v1 submitted 23 February, 2017; originally announced February 2017.

Comments: 27 pages, 5 figures, 3 tables, published version in JCAP. Includes some minor corrections

Journal ref: JCAP 05 (2017) 008

12. arXiv:1702.01768  [pdf, other

Broadband Millimeter-Wave Anti-Reflection Coatings on Silicon Using Pyramidal Sub-Wavelength Structures

Abstract: We used two novel approaches to produce sub-wavelength structure (SWS) anti-reflection coatings (ARC) on silicon for the millimeter and sub-millimeter (MSM) wave band: picosecond laser ablation and dicing with beveled saws. We produced pyramidal structures with both techniques. The diced sample, machined on only one side, had pitch and height of 350 $μ$m and 972 $μ$m. The two laser ablated samples… ▽ More

Submitted 7 June, 2017; v1 submitted 6 February, 2017; originally announced February 2017.

Comments: 12 pages, 16 figures, published in Journal of Applied Physics

13. arXiv:1701.03561  [pdf, ps, other

Flagged Grothendieck polynomials

Authors: Tomoo Matsumura

Abstract: We show that the flagged Grothendieck polynomials defined as the generating functions of flagged set-valued tableaux of Knutson-Miller-Yong can be expressed by a Jacobi-Trudi type determinant formula generalizing the work of Hudson-Matsumura. We also introduce the flagged skew Grothendieck polynomials in these two expressions and show that they coincide. ▽ More

Submitted 12 January, 2017; originally announced January 2017.

14. arXiv:1701.00204  [pdf, ps, other

Vexillary degeneracy loci classes in K-theory and algebraic cobordism

Authors: Thomas Hudson, Tomoo Matsumura

Abstract: In this paper, we prove determinant formulas for the $K$-theory classes of the structure sheaves of degeneracy loci classes associated to vexillary permutations in type $A$. As a consequence we obtain determinant formulas for Lascoux-Schützenberger's double Grothendieck polynomials associated to vexillary permutations. Furthermore, we generalize the determinant formula to algebraic cobordism. ▽ More

Submitted 1 January, 2017; originally announced January 2017.

15. arXiv:1611.06483  [pdf, ps, other

An algebraic proof of determinant formulas of Grothendieck polynomials

Authors: Tomoo Matsumura

Abstract: We give an algebraic proof of the determinant formulas for factorial Grothendieck polynomials obtained by Hudson--Ikeda--Matsumura--Naruse and by Hudson--Matsumura. ▽ More

Submitted 20 November, 2016; originally announced November 2016.

MSC Class: 05E05; 14M15; 19E08

16. arXiv:1611.00523  [pdf, ps, other

Atomic displacements and lattice distortion in the magnetic-field-induced charge ordered state of SmRu$_{4}$P$_{12}$

Abstract: Structural properties of SmRu$_4$P$_{12}$ in the anomalous magnetic ordered phase between $T^*\sim 14$ K and $T_{\text{N}}=16.5$ K in magnetic fields has been studied by x-ray diffraction. Atomic displacements of Ru and P, reflecting the field-induced charge order of the $p$ electrons, have been deduced by analyzing the intensities of the forbidden Bragg peaks, assuming a cubic space group… ▽ More

Submitted 2 November, 2016; originally announced November 2016.

Comments: 11 pages, 11 figures, accepted for publication in PRB

Journal ref: Phys. Rev. B 94, 184425 (2016)

17. arXiv:1609.03637  [pdf, other

A new search for the $K_{L} \to π^0 ν\overlineν$ and $K_{L} \to π^{0} X^{0}$ decays

Authors: J. K. Ahn, K. Y. Baek, S. Banno, B. Beckford, B. Brubaker, T. Cai, M. Campbell, C. Carruth, S. H. Chen, S. Chu, J. Comfort, Y. T. Duh, T. Furukawa, H. Haraguchi, T. Hineno, Y. B. Hsiung, M. Hutcheson, T. Inagaki, M. Isoe, E. Iwai, T. Kamibayashi, I. Kamiji, N. Kawasaki, E. J. Kim, Y. J. Kim , et al. (66 additional authors not shown)

Abstract: We searched for the $CP$-violating rare decay of neutral kaon, $K_{L} \to π^0 ν\overlineν$, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while $0.34\pm0.16$ background events were expected. We set an upper limit of $5.1\times10^{-8}$ for the branching fraction at the 90\% confidence level (C.L.). An upper limit of… ▽ More

Submitted 27 December, 2016; v1 submitted 12 September, 2016; originally announced September 2016.

Comments: 11 pages, 5 figures, to be published in PTEP

Journal ref: Prog. Theor. Exp. Phys. (2017) 021C01

18. arXiv:1609.01925  [pdf, ps, other

Large X-ray Flares on Stars Detected with MAXI/GSC: A Universal Correlation between the Duration of a Flare and its X-ray Luminosity

Abstract: 23 giant flares from 13 active stars (eight RS CVn systems, one Algol system, three dMe stars and one YSO) were detected during the first two years of our all-sky X-ray monitoring with the gas propotional counters (GSC) of the Monitor of All-sky X-ray Image (MAXI). The observed parameters of all of these MAXI/GSC flares are found to be at the upper ends for stellar flares with the luminosity of 10… ▽ More

Submitted 15 September, 2016; v1 submitted 7 September, 2016; originally announced September 2016.

Comments: to be published in Publications of the Astronomical Society of Japan (PASJ)

19. arXiv:1608.03025  [pdf, ps, other

POLARBEAR-2: an instrument for CMB polarization measurements

Authors: Y. Inoue, P. Ade, Y. Akiba, C. Aleman, K. Arnold, C. Baccigalupi, B. Barch, D. Barron, A. Bender, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, T. de Haan, M. A. Dobbs, A. Ducout, R. Dunner, T. Elleflot, J. Errard, G. Fabbian, S. Feeney, C. Feng, G. Fuller, A. J. Gilbert , et al. (61 additional authors not shown)

Abstract: POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland in Chile at an altitude of 5200 m. Its science goals are to measure the CMB polarization signals originating from both primordial gravitational waves and weak lensing. PB-2 is designed to measure the tensor to scalar ratio, r, with precision σ(r) < 0.01, and the sum of neu… ▽ More

Submitted 9 August, 2016; originally announced August 2016.

20. arXiv:1607.02938  [pdf, ps, other

Two-layer anti-reflection coating with mullite and polyimide foam for large-diameter cryogenic infrared filters

Abstract: We have developed a novel two-layer anti-reflection (AR) coating method for large-diameter infrared (IR) filters made of alumina, for the use at cryogenic temperatures in millimeter wave measurements. Thermally- sprayed mullite and polyimide foam (Skybond Foam) are used as the AR material. An advantage of the Skybond Foam is that the index of refraction is chosen between 1.1 and 1.7 by changing th… ▽ More

Submitted 2 November, 2016; v1 submitted 11 July, 2016; originally announced July 2016.

Journal ref: Applied optics Vol. 55, Issue 34, pp. D22-D28 (2016)

21. arXiv:1605.09498  [pdf, other

Spin-Orbit Torques in ferrimagnetic GdFeCo Alloys

Abstract: The spin-orbit torque switching of ferrimagnetic Gd$_x$(Fe$_{90}$Co$_{10}$)$_{100-x}$ films was studied for both transition metal (TM)-rich and rare earth (RE)-rich configurations. The spin-orbit torque driven magnetization switching follows the same handedness in TM-rich and RE-rich samples with respect to the total magnetization, but the handedness of the switching is reversed with respect to th… ▽ More

Submitted 31 May, 2016; originally announced May 2016.

22. arXiv:1602.07953  [pdf, ps, other

Kempf-Laksov Schubert classes for even infinitesimal cohomology theories

Authors: Thomas Hudson, Tomoo Matsumura

Abstract: In this paper, we prove a generalization of Kempf-Laksov formula for the degeneracy loci classes in even infinitesimal cohomology theories of the Grassmannian bundle and the Lagrangian Grassmannian bundle. ▽ More

Submitted 25 February, 2016; originally announced February 2016.

23. arXiv:1602.05704  [pdf, ps, other

Segre classes and Kempf-Laksov formula in algebraic cobordism

Authors: Thomas Hudson, Tomoo Matsumura

Abstract: In this paper, we study Segre classes in algebraic cobordism. We also prove a generalization of Kempf-Laksov formula for the degeneracy loci classes in the algebraic cobordism of the Grassmannian bundle. ▽ More

Submitted 25 April, 2018; v1 submitted 18 February, 2016; originally announced February 2016.

Comments: 14 pages. The exposition and some arguments have been modified

MSC Class: 14M15; 55N22; 05E05; 14C17

24. arXiv:1602.04448  [pdf, ps, other

Pfaffian formula for $K$-theory of odd orthogonal Grassmannians

Abstract: We prove a Pfaffain formula for the $K$-theory class of the degeneracy loci in the bundle of odd maximal orthogonal Grassmannians. ▽ More

Submitted 14 February, 2016; originally announced February 2016.

25. arXiv:1601.08246  [pdf, other

Millimeter-Wave Broadband Anti-Reflection Coatings Using Laser Ablation of Sub-Wavelength Structures

Abstract: We report on the first use of laser ablation to make sub-millimeter, broad-band, anti-reflection coatings (ARC) based on sub-wavelength structures (SWS) on alumina and sapphire. We used a 515 nm laser to produce pyramid-shaped structures with pitch of about 320 $μ$m and total height of near 800 $μ$m. Transmission measurements between 70 and 140 GHz are in agreement with simulations using electroma… ▽ More

Submitted 30 March, 2016; v1 submitted 29 January, 2016; originally announced January 2016.

Comments: 8 pages, 15 figures. Submitted to Applied Optics

Journal ref: Applied Optics, Vol. 55, Issue 13, pp. 3502-3509 (2016)

26. arXiv:1512.07299  [pdf, ps, other

The POLARBEAR-2 and the Simons Array Experiment

Authors: A. Suzuki, P. Ade, Y. Akiba, C. Aleman, K. Arnold, C. Baccigalupi, B. Barch, D. Barron, A. Bender, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, M. Dobbs, A. Ducout, R. Dunner, T. Elleflot, J. Errard, G. Fabbian, S. Feeney, C. Feng, T. Fujino, G. Fuller, A. Gilbert , et al. (64 additional authors not shown)

Abstract: We present an overview of the design and status of the \Pb-2 and the Simons Array experiments. \Pb-2 is a Cosmic Microwave Background polarimetry experiment which aims to characterize the arc-minute angular scale B-mode signal from weak gravitational lensing and search for the degree angular scale B-mode signal from inflationary gravitational waves. The receiver has a 365~mm diameter focal plane c… ▽ More

Submitted 22 December, 2015; originally announced December 2015.

Comments: Accepted to Journal of Low Temperature Physics LTD16 Special Issue, Low Temperature Detector 16 Conference Proceedings, 5 pages, 1 figure

27. arXiv:1512.06530  [pdf, ps, other

Kondo effect in CeX$_{c}$ (X$_{c}$=S, Se, Te) studied by electrical resistivity under high pressure

Abstract: We have measured the electrical resistivity of cerium monochalcogenices, CeS, CeSe, and CeTe, under high pressures up to 8 GPa. Pressure dependences of the antiferromagnetic ordering temperature $T_{N}$, crystal field splitting, and the $\ln T$ anomaly of the Kondo effect have been studied to cover the whole region from the magnetic ordering regime at low pressure to the Fermi liquid regime at hig… ▽ More

Submitted 21 December, 2015; originally announced December 2015.

Comments: 9 pages, 5 figures, accepted for publication in J. Phys. Soc. Jpn

Journal ref: J. Phys. Soc. Jpn. 85, 034704 (2016)

28. arXiv:1511.08414  [pdf, other

A declarative extension of parsing expression grammars for recognizing most programming languages

Authors: Tetsuro Matsumura, Kimio Kuramitsu

Abstract: Parsing Expression Grammars are a popular foundation for describing syntax. Unfortunately, several syntax of programming languages are still hard to recognize with pure PEGs. Notorious cases appears: typedef-defined names in C/C++, indentation-based code layout in Python, and HERE document in many scripting languages. To recognize such PEG-hard syntax, we have addressed a declarative extension to… ▽ More

Submitted 26 November, 2015; originally announced November 2015.

Comments: To appear in Journal of Information Processing, 24(2), 2016

29. arXiv:1511.02966  [pdf, ps, other

Incommensurate-Commensurate Magnetic Phase Transition in SmRu$_{2}$Al$_{10}$

Authors: S. Takai, T. Matsumura, H. Tanida, M. Sera

Abstract: Magnetic properties of single crystalline SmRu$_{2}$Al$_{10}$ have been investigated by electrical resistivity, magnetic susceptibility, and specific heat. We have confirmed the successive magnetic phase transitions at $T_{\text{N}}=12.3$ K and $T_{\text{M}}=5.6$ K. Resonant x-ray diffraction has also been performed to study the magnetic structures. Below $T_{\text{N}}$, the Sm$^{3+}$ moments orde… ▽ More

Submitted 9 November, 2015; originally announced November 2015.

Comments: 11 pages, 12 figures, accepted in PRB

Journal ref: Phys. Rev. B 92, 174427 (2015)

30. arXiv:1509.09043  [pdf, ps, other

Structural Domain Switching by Magnetic Fields in RAl$_3$C$_3$ (R=Rare Earth)

Abstract: Hexagonal-to-orthorhombic structural transitions in RAl$_3$C$_3$ have been studied by X-ray diffraction for R=Yb, Tm, Er, Dy, and Lu. We report how orthorhombic domains are controlled by adjusting external magnetic fields. It is shown that orthorhombic domains in RAl$_3$C$_3$ can be aligned by the field when the R ion is magnetic. It is also shown that a single-domain state can be switched to anot… ▽ More

Submitted 30 September, 2015; originally announced September 2015.

Comments: 8 pages, 10 figures, 1 table, accepted in J. Phys. Soc. Jpn

Journal ref: J. Phys. Soc. Jpn. 84, 114712 (2015)

31. arXiv:1509.03386  [pdf, other

Long-lived neutral-kaon flux measurement for the KOTO experiment

Authors: T. Masuda, J. K. Ahn, S. Banno, M. Campbell, J. Comfort, Y. T. Duh, T. Hineno, Y. B. Hsiung, T. Inagaki, E. Iwai, N. Kawasaki, E. J. Kim, Y. J. Kim, J. W. Ko, T. K. Komatsubara, A. S. Kurilin, G. H. Lee, J. W. Lee, S. K. Lee, G. Y. Lim, J. Ma, D. MacFarland, Y. Maeda, T. Matsumura, R. Murayama , et al. (32 additional authors not shown)

Abstract: The KOTO ($K^0$ at Tokai) experiment aims to observe the CP-violating rare decay $K_L \rightarrow π^0 ν\barν$ by using a long-lived neutral-kaon beam produced by the 30 GeV proton beam at the Japan Proton Accelerator Research Complex. The $K_L$ flux is an essential parameter for the measurement of the branching fraction. Three $K_L$ neutral decay modes, $K_L \rightarrow 3π^0$,… ▽ More

Submitted 7 January, 2016; v1 submitted 11 September, 2015; originally announced September 2015.

Comments: 27 pages, 16 figures. To be appeared in Progress of Theoretical and Experimental Physics

Journal ref: Prog. Theor. Exp. Phys. 2016, 013C03

32. arXiv:1509.02461  [pdf, other

POLARBEAR Constraints on Cosmic Birefringence and Primordial Magnetic Fields

Abstract: We constrain anisotropic cosmic birefringence using four-point correlations of even-parity $E$-mode and odd-parity $B$-mode polarization in the cosmic microwave background measurements made by the POLARization of the Background Radiation (POLARBEAR) experiment in its first season of observations. We find that the anisotropic cosmic birefringence signal from any parity-violating processes is consis… ▽ More

Submitted 4 January, 2016; v1 submitted 8 September, 2015; originally announced September 2015.

Comments: 10 pages, 5 figures. Phys. Rev. D Editors' Suggestion

Journal ref: Phys. Rev. D 92, 123509 (2015)

33. arXiv:1504.02828  [pdf, ps, other

Degeneracy Loci Classes in $K$-theory - Determinantal and Pfaffian Formula -

Abstract: We prove a determinantal formula and Pfaffian formulas that respectively describe the $K$-theoretic degeneracy loci classes for Grassmann bundles and for symplectic Grassmann and odd orthogonal bundles. The former generalizes Damon--Kempf--Laksov's determinantal formula and the latter generalize Pragacz--Kazarian's formula for the Chow ring. As an application, we introduce the factorial $GΘ/ GΘ'$-… ▽ More

Submitted 16 October, 2016; v1 submitted 10 April, 2015; originally announced April 2015.

Comments: This is a major update. In particular, we extended the results in arXiv:1602.04448 and included in this version. We modified the expositions in several places from the previous version

MSC Class: 14M15; 05E05; 13D15

34. arXiv:1501.07911  [pdf, other

Modeling atmospheric emission for CMB ground-based observations

Authors: J. Errard, P. A. R. Ade, Y. Akiba, K. Arnold, M. Atlas, C. Baccigalupi, D. Barron, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, J. Delabrouille, M. Dobbs, A. Ducout, T. Elleflot, G. Fabbian, C. Feng, S. Feeney, A. Gilbert, N. Goeckner-Wald, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi , et al. (50 additional authors not shown)

Abstract: Atmosphere is one of the most important noise sources for ground-based cosmic microwave background (CMB) experiments. By increasing optical loading on the detectors, it amplifies their effective noise, while its fluctuations introduce spatial and temporal correlations between detected signals. We present a physically motivated 3d-model of the atmosphere total intensity emission in the millimeter a… ▽ More

Submitted 12 November, 2015; v1 submitted 30 January, 2015; originally announced January 2015.

Journal ref: The Astrophysical Journal, Volume 809, Issue 1, article id. 63, 19 pp. (2015)

35. arXiv:1410.7488  [pdf, ps, other

Development and characterization of the readout system for POLARBEAR-2

Authors: D. Barron, P. A. R. Ade, Y. Akiba, C. Aleman, K. Arnold, M. Atlas, A. Bender, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, A. Cukierman, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, A. Gilbert, N. Goeckner-Wald, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. L. Holzapfel, Y. Hori , et al. (47 additional authors not shown)

Abstract: POLARBEAR-2 is a next-generation receiver for precision measurements of the polarization of the cosmic microwave background (Cosmic Microwave Background (CMB)). Scheduled to deploy in early 2015, it will observe alongside the existing POLARBEAR-1 receiver, on a new telescope in the Simons Array on Cerro Toco in the Atacama desert of Chile. For increased sensitivity, it will feature a larger area f… ▽ More

Submitted 6 November, 2014; v1 submitted 27 October, 2014; originally announced October 2014.

Comments: Presented at SPIE Astronomical Telescopes and Instrumentation 2014: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII. Published in Proceedings of SPIE Volume 9153

Journal ref: Proc. SPIE 9153 (915335), 2014

36. arXiv:1409.8367  [pdf, ps, other

Photon-Veto Counters at the Outer Edge of the Endcap Calorimeter for the KOTO Experiment

Abstract: The Outer-Edge Veto (OEV) counter subsystem for extra-photon detection from the backgrounds for the? $K^0_L\rightarrowπ^0ν\barν$ decay is located at the outer edge of the endcap CsI calorimeter of the KOTO experiment at J-PARC. The subsystem is composed of 44 counters with different cross-sectional shapes. All counters are made of lead and scintillator plates and read out through wavelength-shifti… ▽ More

Submitted 18 May, 2015; v1 submitted 29 September, 2014; originally announced September 2014.

Comments: 23 figures, To be published in Nuclear Instruments and Methods in Physics Research Section A

Journal ref: Nucl. Inst. and Meth. A 795 (2015) 19-31

37. arXiv:1404.5795  [pdf, other

Mitigation of the spectral dependent polarization angle response for achromatic half-wave plate

Authors: Tomotake Matsumura

Abstract: Polarimetry using a half-wave plate (HWP) modulator provides the strong tools to avoid a detector 1/f noise and instrument-originated spurious polarization systematic effects. While the Pancharatnam achromatic HWP (AHWP) is commonly used for an application that needs a broadband frequency coverage, this technique introduces a frequency-dependent polarization angle rotation. In this paper we propos… ▽ More

Submitted 23 April, 2014; originally announced April 2014.

38. arXiv:1403.2369  [pdf, other

A Measurement of the Cosmic Microwave Background B-Mode Polarization Power Spectrum at Sub-Degree Scales with POLARBEAR

Authors: The POLARBEAR Collaboration, P. A. R. Ade, Y. Akiba, A. E. Anthony, K. Arnold, M. Atlas, D. Barron, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, D. Flanigan, A. Gilbert, W. Grainger, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. L. Holzapfel, Y. Hori , et al. (49 additional authors not shown)

Abstract: We report a measurement of the B-mode polarization power spectrum in the cosmic microwave background (CMB) using the POLARBEAR experiment in Chile. The faint B-mode polarization signature carries information about the Universe's entire history of gravitational structure formation, and the cosmic inflation that may have occurred in the very early Universe. Our measurement covers the angular multipo… ▽ More

Submitted 21 October, 2014; v1 submitted 10 March, 2014; originally announced March 2014.

Comments: 22 pages, 12 figures. Updated to reflect version published in Astrophysical Journal

Journal ref: Astrophysical Journal, 794:171, 2014

39. arXiv:1401.3073  [pdf, ps, other

Pfaffian sum formula for the symplectic Grassmannians

Authors: Takeshi Ikeda, Tomoo Matsumura

Abstract: We study the torus equivariant Schubert classes of the Grassmannian of non-maximal isotropic subspaces in a symplectic vector space. We prove a formula that expresses each of those classes as a sum of multi Schur-Pfaffians, whose entries are equivariantly modified special Schubert classes. Our result gives a proof to Wilson's conjectural formula, which generalizes the Giambelli formula for the ord… ▽ More

Submitted 31 December, 2014; v1 submitted 14 January, 2014; originally announced January 2014.

Comments: Version 3: an error of a proof in the previous version has been fixed. to appear in Mathematische Zeitschrift

MSC Class: 14M15; 05E05

Journal ref: Mathematische Zeitschrift, 2015, Volume 280, Issue 1-2, pp 269-306

40. arXiv:1312.7877  [pdf, ps, other

Self-Calibration of BICEP1 Three-Year Data and Constraints on Astrophysical Polarization Rotation

Authors: J. P. Kaufman, N. J. Miller, M. Shimon, D. Barkats, C. Bischoff, I. Buder, B. G. Keating, J. M. Kovac, P. A. R. Ade, R. Aikin, J. O. Battle, E. M. Bierman, J. J. Bock, H. C. Chiang, C. D. Dowell, L. Duband, J. Filippini, E. F. Hivon, W. L. Holzapfel, V. V. Hristov, W. C. Jones, S. S. Kernasovskiy, C. L. Kuo, E. M. Leitch, P. V. Mason , et al. (11 additional authors not shown)

Abstract: Cosmic Microwave Background (CMB) polarimeters aspire to measure the faint $B$-mode signature predicted to arise from inflationary gravitational waves. They also have the potential to constrain cosmic birefringence which would produce non-zero expectation values for the CMB's $TB$ and $EB$ spectra. However, instrumental systematic effects can also cause these $TB$ and $EB$ correlations to be non-z… ▽ More

Submitted 30 December, 2013; originally announced December 2013.

Journal ref: Phys. Rev. D 89, 062006 (2014)

41. arXiv:1312.6646  [pdf, ps, other

Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR experiment

Authors: POLARBEAR Collaboration, P. A. R. Ade, Y. Akiba, A. E. Anthony, K. Arnold, M. Atlas, D. Barron, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, D. Flanigan, A. Gilbert, W. Grainger, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. L. Holzapfel, Y. Hori , et al. (48 additional authors not shown)

Abstract: Gravitational lensing due to the large-scale distribution of matter in the cosmos distorts the primordial Cosmic Microwave Background (CMB) and thereby induces new, small-scale $B$-mode polarization. This signal carries detailed information about the distribution of all the gravitating matter between the observer and CMB last scattering surface. We report the first direct evidence for polarization… ▽ More

Submitted 27 April, 2014; v1 submitted 23 December, 2013; originally announced December 2013.

Comments: 7 pages, 3 figures. Matches Physical Review Letters accepted version. Submitted on 11 March 2014; accepted on 25 April 2014. The companion paper (arXiv:1312.6645) describes a measurement of polarization lensing in cross-correlation

Journal ref: Phys. Rev. Lett. 113, 021301 (2014)

42. arXiv:1312.6645  [pdf, ps, other

Evidence for Gravitational Lensing of the Cosmic Microwave Background Polarization from Cross-correlation with the Cosmic Infrared Background

Authors: POLARBEAR Collaboration, P. A. R. Ade, Y. Akiba, A. E. Anthony, K. Arnold, M. Atlas, D. Barron, D. Boettger, J. Borrill, C. Borys, S. Chapman, Y. Chinone, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, D. Flanigan, A. Gilbert, W. Grainger, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. L. Holzapfel , et al. (51 additional authors not shown)

Abstract: We reconstruct the gravitational lensing convergence signal from Cosmic Microwave Background (CMB) polarization data taken by the POLARBEAR experiment and cross-correlate it with Cosmic Infrared Background (CIB) maps from the Herschel satellite. From the cross-spectra, we obtain evidence for gravitational lensing of the CMB polarization at a statistical significance of 4.0$σ$ and evidence for the… ▽ More

Submitted 7 March, 2014; v1 submitted 23 December, 2013; originally announced December 2013.

Comments: 6 pages, 2 figures. v2: replaced with version accepted for publication in Physical Review Letters. The companion paper (arXiv:1312.6646) describes a measurement of the polarization lensing power spectrum

Journal ref: Phys. Rev. Lett. 112, 131302 (2014)

43. arXiv:1311.5388  [pdf, ps, other

Cryogenic infrared filter made of alumina for use at millimeter wavelength

Abstract: We propose a high thermal conductivity infrared (IR) filter using alumina for use in millimeter wave detection systems. We constructed a prototype two-layer anti-reflection (AR) coated alumina filter with a diameter of 100mm and a thickness of 2mm, and characterized its thermal and optical properties. The transmittance of this filter at 95GHz and 150GHz is 97% and 95% while the estimated 3dB cutof… ▽ More

Submitted 1 March, 2014; v1 submitted 21 November, 2013; originally announced November 2013.

44. arXiv:1311.2847  [pdf, other

Mission design of LiteBIRD

Authors: T. Matsumura, Y. Akiba, J. Borrill, Y. Chinone, M. Dobbs, H. Fuke, A. Ghribi, M. Hasegawa, K. Hattori, M. Hattori, M. Hazumi, W. Holzapfel, Y. Inoue, K. Ishidoshiro, H. Ishino, H. Ishitsuka, K. Karatsu, N. Katayama, I. Kawano, A. Kibayashi, Y. Kibe, K. Kimura, N. Kimura, K. Koga, M. Kozu , et al. (44 additional authors not shown)

Abstract: LiteBIRD is a next-generation satellite mission to measure the polarization of the cosmic microwave background (CMB) radiation. On large angular scales the B-mode polarization of the CMB carries the imprint of primordial gravitational waves, and its precise measurement would provide a powerful probe of the epoch of inflation. The goal of LiteBIRD is to achieve a measurement of the characterizing t… ▽ More

Submitted 12 November, 2013; originally announced November 2013.

Journal ref: Journal of Low Temperature Physics September 2014, Volume 176, Issue 5-6, pp 733-740

45. arXiv:1310.1422  [pdf, ps, other

Degree-Scale CMB Polarization Measurements from Three Years of BICEP1 Data

Authors: BICEP1 Collaboration, D. Barkats, R. Aikin, C. Bischoff, I. Buder, J. P. Kaufman, B. G. Keating, J. M. Kovac, M. Su, P. A. R. Ade, J. O. Battle, E. M. Bierman, J. J. Bock, H. C. Chiang, C. D. Dowell, L. Duband, J. Filippini, E. F. Hivon, W. L. Holzapfel, V. V. Hristov, W. C. Jones, C. L. Kuo, E. M. Leitch, P. V. Mason, T. Matsumura , et al. (10 additional authors not shown)

Abstract: BICEP1 is a millimeter-wavelength telescope designed specifically to measure the inflationary B-mode polarization of the Cosmic Microwave Background (CMB) at degree angular scales. We present results from an analysis of the data acquired during three seasons of observations at the South Pole (2006 to 2008). This work extends the two-year result published in Chiang et al. (2010), with additional da… ▽ More

Submitted 22 April, 2015; v1 submitted 4 October, 2013; originally announced October 2013.

Comments: 19 pages, 13 figures. Data release for this publication: http://bicep.rc.fas.harvard.edu/bicep1_3yr/

Journal ref: ApJ 783, 67 (2014)

46. arXiv:1308.6453  [pdf, ps, other

Development of High Intensity Laser-Electron Photon Beams up to 2.9 GeV at the SPring-8 LEPS Beamline

Authors: N. Muramatsu, Y. Kon, S. Daté, Y. Ohashi, H. Akimune, J. Y. Chen, M. Fujiwara, S. Hasegawa, T. Hotta, T. Ishikawa, T. Iwata, Y. Kato, H. Kohri, T. Matsumura, T. Mibe, Y. Miyachi, Y. Morino, T. Nakano, Y. Nakatsugawa, H. Ohkuma, T. Ohta, M. Oka, T. Sawada, A. Wakai, K. Yonehara , et al. (3 additional authors not shown)

Abstract: A laser-Compton backscattering beam, which we call a `Laser-Electron Photon' beam, was upgraded at the LEPS beamline of SPring-8. We accomplished the gains in backscattered photon beam intensities by factors of 1.5--1.8 with the injection of two adjacent laser beams or a higher power laser beam into the storage ring. The maximum energy of the photon beam was also extended from 2.4 GeV to 2.9 GeV w… ▽ More

Submitted 29 August, 2013; originally announced August 2013.

Comments: 31 pages, 9 figures, Submitted to Nuclear Instruments and Methods in Physics Research Section A on 29 May 2013

47. arXiv:1306.5320  [pdf, ps, other

Search for $K^-pp$ bound state via $γd \rightarrow K^+ π^-X$ reaction at $E_γ=1.5-2.4$ GeV

Authors: A. O. Tokiyasu, M. Niiyama, J. D. Parker, D. S. Ahn, J. K. Ahn, S. Ajimura, H. Akimune, Y. Asano, W. C. Chang, J. Y. Chen, S. Daté, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, S. Hasegawa, K. Hicks, K. Horie, T. Hotta, S. H. Hwang, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai , et al. (47 additional authors not shown)

Abstract: A search for $K^-pp$ bound state (the lightest kaonic nucleus) has been performed using the $γd \rightarrow K^+ π^- \rm{X}$ reaction at E$_γ$=1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of $K^+ π^-$ photo-production off deuterium has been measured for the first time in this energy region, and a bump structure was searched for in the inclusive missing mass spectrum. A statistically… ▽ More

Submitted 22 June, 2013; originally announced June 2013.

48. arXiv:1303.5068  [pdf, other

Planck 2013 results. VII. HFI time response and beams

Abstract: This paper characterizes the effective beams,the effective beam window functions and the associated errors for the Planck HFI detectors. The effective beam is the angular response including the effect of the optics,detectors,data processing and the scan strategy. The window function is the representation of this beam in the harmonic domain which is required to recover an unbiased measurement of th… ▽ More

Submitted 15 December, 2013; v1 submitted 20 March, 2013; originally announced March 2013.

49. arXiv:1303.5062  [pdf, other

Planck 2013 results. I. Overview of products and scientific results

Abstract: The ESA's Planck satellite, dedicated to studying the early Universe and its subsequent evolution, was launched 14 May 2009 and has been scanning the microwave and submillimetre sky continuously since 12 August 2009. This paper gives an overview of the mission and its performance, the processing, analysis, and characteristics of the data, the scientific results, and the science data products and p… ▽ More

Submitted 5 June, 2014; v1 submitted 20 March, 2013; originally announced March 2013.

50. arXiv:1301.2098  [pdf, ps, other

Spectral Evolution of a New X-ray Transient MAXI J0556-332 Observed by MAXI, Swift, and RXTE

Abstract: We report on the spectral evolution of a new X-ray transient, MAXI J0556-332, observed by MAXI, Swift, and RXTE. The source was discovered on 2011 January 11 (MJD=55572) by MAXI Gas Slit Camera all-sky survey at (l,b)=(238.9deg, -25.2deg), relatively away from the Galactic plane. Swift/XRT follow-up observations identified it with a previously uncatalogued bright X-ray source and led to optical id… ▽ More

Submitted 10 January, 2013; originally announced January 2013.

Comments: 14 pages, 8 figures, accepted for publication in PASJ
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