Azimuthal anisotropy measurements of strange and multistrange hadrons in U+U collisions at sNN=193 GeV at the BNL Relativistic Heavy Ion Collider Academic Article uri icon

abstract

  • We present systematic measurements of azimuthal anisotropy for strange and multistrange hadrons ($K^{0}_{s}$, $Lambda$, $Xi$, and $Omega$) and $phi$ mesons at midrapidity ($|y| <$ 1.0) in collisions of U + U nuclei at $sqrt{s_{NN}} = 193$ GeV, recorded by the STAR detector at the Relativistic Heavy Ion Collider. Transverse momentum ($p_{ ext{T}}$) dependence of flow coefficients ($v_{2}$, $v_{3}$, and $v_{4}$) is presented for minimum bias collisions and three different centrality intervals. Number of constituent quark scaling of the measured flow coefficients in U + U collisions is discussed. We also present the ratio of $v_{n}$ scaled by the participant eccentricity ($varepsilon_{n}leftlbrace 2
    ight
    brace$) to explore system size dependence and collectivity in U + U collisions. The magnitude of $v_{2}/varepsilon_{2}$ is found to be smaller in U + U collisions than that in central Au + Au collisions contradicting naive eccentricity scaling. Furthermore, the ratios between various flow harmonics ($v_{3}/v_{2}^{3/2}$, $v_{4}/v_{2}^{4/2}$) are studied and compared with hydrodynamic and transport model calculations.

author list (cited authors)

  • Abdallah, M. S., Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., ... Zyzak, M.

publication date

  • January 1, 2021 11:11 AM