title: Exploiting intrinsic triangular geometry in relativistic (3)He+Au collisions to disentangle medium properties.
abstract: Recent results in d+Au and p+Pb collisions at RHIC and the LHC provide evidence for collective expansion and flow of the created medium. We propose a control set of experiments to directly compare particle emission patterns from p+Pb, d+Au, and ^{3}He+Au or t+Au collisions at the same sqrt[s_{NN}] . Using a Monte Carlo Glauber simulation we find that a ^{3}He or triton projectile, with a realistic wave function description, induces a significant intrinsic triangular shape to the initial medium. If the system lives long enough, this survives into a significant third-order flow moment v_{3} even with viscous damping. By comparing systems with one, two, and three initial hot spots, one could disentangle the effects from the initial spatial distribution of the deposited energy and viscous damping. These are key tools for answering the question of how small a droplet of matter is necessary to form a quark-gluon plasma described by nearly inviscid hydrodynamics.
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Nagle
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: A
authors.initials: A
authors.lastname: Adare
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: S
authors.initials: S
authors.lastname: Beckman
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: T
authors.initials: T
authors.lastname: Koblesky
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: J Orjuela
authors.initials: JO
authors.lastname: Koop
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: D
authors.initials: D
authors.lastname: McGlinchey
authors.affiliation: University of Colorado at Boulder, Boulder, Colorado 80309, USA.
authors.forename: P
authors.initials: P
authors.lastname: Romatschke
authors.affiliation: Los Alamos National Laboratory,Los Alamos, New Mexico 87545, USA.
authors.forename: J
authors.initials: J
authors.lastname: Carlson
authors.affiliation: Los Alamos National Laboratory,Los Alamos, New Mexico 87545, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Lynn
authors.affiliation: Los Alamos National Laboratory,Los Alamos, New Mexico 87545, USA.
authors.forename: M
authors.initials: M
authors.lastname: McCumber