Title: Connecting HL Tau to the Observed Exoplanet Sample,
Abstract: The Atacama Large Millimeter/submilimeter Array (ALMA) recently revealed a
set of nearly concentric gaps in the protoplanetary disk surrounding the young
star HL Tau. If these are carved by forming gas giants, this provides the first
set of orbital initial conditions for planets as they emerge from their birth
disks. Using N-body integrations, we have followed the evolution of the system
for 5 Gyr to explore the possible outcomes. We find that HL Tau initial
conditions scaled down to the size of typically observed exoplanet orbits
naturally produce several populations in the observed exoplanet sample. First,
for a plausible range of planetary masses, we can match the observed
eccentricity distribution of dynamically excited radial velocity giant planets
with eccentricities $>$ 0.2. Second, we roughly obtain the observed rate of hot
Jupiters around FGK stars. Finally, we obtain a large efficiency of planetary
ejections of $\approx 2$ per HL Tau-like system, but the small fraction of
stars observed to host giant planets makes it hard to match the rate of
free-floating planets inferred from microlensing observations. In view of
upcoming GAIA results, we also provide predictions for the expected mutual
inclination distribution, which is significantly broader than the absolute
inclination distributions typically considered by previous studies.