Directed flow of quarks from the RHIC Beam Energy Scan measured by STAR
| العنوان: | Directed flow of quarks from the RHIC Beam Energy Scan measured by STAR |
|---|---|
| المؤلفون: | Yu-Gang Ma, Sonia Kabana, Gang Wang |
| بيانات النشر: | eScholarship, University of California, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Quark, heavy-ion collision, Nuclear and High Energy Physics, coalescence, beam energy scan, Hadron, FOS: Physical sciences, Elementary particle, Lambda baryon, 01 natural sciences, Atomic, Nuclear physics, Particle and Plasma Physics, 0103 physical sciences, Nuclear, directed flow, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Quantum Physics, 010308 nuclear & particles physics, transported quark, High Energy Physics::Phenomenology, Hyperon, Molecular, Fermion, Nuclear & Particles Physics, Baryon, High Energy Physics::Experiment, Sum rule in quantum mechanics, Astronomical and Space Sciences |
| الوصف: | Directed flow ($v_1$) is a good probe of the early-stage dynamics of collision systems, and the $v_1$ slope at midrapidity ($dv_1/dy|_{y=0}$) is sensitive to the system's equation of state. STAR has published $v_1(y)$ measurements for ten particle species ($\pi^\pm$, $p$, $\bar{p}$, $\Lambda$, $\bar{\Lambda}$, $\phi$, $K^\pm$ and $K^0_{S}$) in Au+Au collisions at eight beam energies from $\sqrt{s_{NN}} = 7.7$ GeV to 200 GeV. In this study, we employ a simple coalescence idea to decompose $v_1$ of hadrons into $v_1$ of constituent quarks. The $dv_1/dy$ values of $\bar{p}$, $K^-$ and $\bar{\Lambda}$ are used to test the coalescence sum rule for produced quarks. Data involving produced quarks support the coalescence picture at $\sqrt{s_{NN}} = 11.5$ GeV to 200 GeV, and a sharp deviation from this picture is observed at 7.7 GeV. The $dv_1/dy$ of transported quarks is studied via net particles (net $p$ and net $\Lambda$). In these proceedings, we further extract the $v_1$ slopes of produced and transported quarks, assuming that the coalescence sum rule is valid. Comment: 4 pages, 5 figures, Quark Matter 2018 proceedings |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e7548afb7b1bba45deb7aa1cfe44e46Test https://escholarship.org/uc/item/0b89p3t1Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....2e7548afb7b1bba45deb7aa1cfe44e46 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |