TY - JOUR
T1 - Electric-charge-dependent directed flow splitting of produced quarks in Au+Au collisions
AU - Aboona, B. E.
AU - Adam, J.
AU - Agakishiev, G.
AU - Aggarwal, I.
AU - Kabana, S.
AU - STAR Collaboration
N1 - Publisher Copyright:
© 2025 The Author(s)
PY - 2025/3
Y1 - 2025/3
N2 - We report directed flow (v1) of multistrange baryons (Ξ and Ω) and improved v1 data for K−, p¯, Λ¯ and ϕ in Au+Au collisions at sNN=27 and 200 GeV from the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). We focus on particles whose constituent quarks are not transported from the incoming nuclei but instead are produced in the collisions. At intermediate impact parameters, we examine quark coalescence behavior for particle combinations with identical quark content, and search for any departure from this behavior (“splitting”) for combinations having non-identical quark content. Under the assumption of quark coalescence for produced quarks, the splitting strength appears to increase with the electric charge difference of the constituent quarks in the combinations, consistent with electromagnetic effect expectations.
AB - We report directed flow (v1) of multistrange baryons (Ξ and Ω) and improved v1 data for K−, p¯, Λ¯ and ϕ in Au+Au collisions at sNN=27 and 200 GeV from the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). We focus on particles whose constituent quarks are not transported from the incoming nuclei but instead are produced in the collisions. At intermediate impact parameters, we examine quark coalescence behavior for particle combinations with identical quark content, and search for any departure from this behavior (“splitting”) for combinations having non-identical quark content. Under the assumption of quark coalescence for produced quarks, the splitting strength appears to increase with the electric charge difference of the constituent quarks in the combinations, consistent with electromagnetic effect expectations.
KW - Directed flow
KW - Electric charge
KW - Electromagnetic field
KW - Heavy-ion collisions
KW - Strangeness
UR - https://www.scopus.com/pages/publications/85216089706
U2 - 10.1016/j.physletb.2025.139245
DO - 10.1016/j.physletb.2025.139245
M3 - Article
AN - SCOPUS:85216089706
SN - 0370-2693
VL - 862
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 139245
ER -