on admission of new members institutions to the Collaboration, and Policies for the Publication and Presentation of STAR Results. The term of the office of the Council Chair is nominally two years. The Council elects, a Spokesperson or a team of two Spokespersons who then serve at the discretion of the Council. The normal term of office for the Spokesperson(s) is 3 years, and an individual is eligible to serve at most two consecutive terms as Spokesperson(s). The elected Spokesperson(s) and their team of Deputies, and the Council Chairs of STAR are listed below. The Institute listed indicates the institute the person was at when they held the position. Spokespersons 2020–present Spokespeople : Helen Caines (Yale), Lijuan Ruan (BNL) Deputies: Kenneth Barish (UC Riverside), Xin Dong (LBNL) 2017–2020 Spokespeople : Helen Caines (Yale), Zhangbu Xu (BNL) Deputies: Jim Drachenberg (ACU), Frank Geurts (Rice) 2014–2017 : Zhangbu Xu (BNL) Deputies : Helen Caines (Yale), Renee Fatemi (UTK), Ernst Sichtermann (LBNL) 2011–2014 : Nu Xu (LBNL) Deputies: James Dunlop (BNL), Bedangadas Mohanty (VECC/NISER), Scott Wissink (Indiana) 2008–2011: Nu Xu (LBNL) Deputies : James Dunlop (BNL), Olga Evdokimov (UIC), Berndt Surrow (MIT) 2005–2008 : Tim Hallman (BNL) Deputies : Carl Gagliardi (Texas A&M), Hans Georg Ritter (LBNL), Helen Caines (Yale) (2007 - 2008) 2002–2005 : Tim Hallman (BNL) Deputies : Jim Thomas (LBNL), Steven Vigdor (Indiana) 1991–2002 : John Harris (Yale) Deputies : Rene Bellwied (Wayne State) (2001-2002), Tim Hallman (BNL) (1999-2000) Council Chairpersons 2021–present : Jana Bielcikova (NPI, CAS) 2016–2021 : Olga Evdokimov (UIC) 2014–2016 : Huan Huang (UCLA) 2009–2014 : Gary Westfall (MSU) 2005–2008 : Hank Crawford (UC Berkeley) 2003–2005 : Bill Christie (BNL) 2000–2003 : Jay Marx (LBNL) See also Breit–Wheeler process Vacuum birefringence References External Links STAR experiment record on INSPIRE-HEP Particle experiments