Strange hadron production in Au plus Au collisions at root S-NN=7.7, 11.5, 19.6, 27, and 39 GeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00534272" target="_blank" >RIV/61389005:_____/20:00534272 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1103/PhysRevC.102.034909" target="_blank" >https://doi.org/10.1103/PhysRevC.102.034909</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.102.034909" target="_blank" >10.1103/PhysRevC.102.034909</a>

Result language

angličtina

Original language name

Strange hadron production in Au plus Au collisions at root S-NN=7.7, 11.5, 19.6, 27, and 39 GeV

Original language description

We present STAR measurements of strange hadron (K-S(0), Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+), and phi) production at midrapidity (vertical bar y vertical bar < 0.5) in Au + Au collisions at root S-NN = 7.7-39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse-momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios (<(Lambda)over bar>/Lambda, (Xi) over bar (+)/Xi(-), (Omega) over bar (+)/Omega(-)) are presented as well and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out (mu(B)/T-ch and mu(S)/T-ch) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors (R-CP) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The K-S(0) R-CP shows no suppression for P-T up to 3.5 GeV/c at energies of 7.7 and 11.5 GeV. The (Lambda) over bar /K-S(0) ratio also shows baryon-to-meson enhancement at intermediate p(T) (approximate to 2.5 GeV/c) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

<a href="/en/project/LTT18002" target="_blank" >LTT18002: Study of new properties of nuclear matter in the international experiment STAR</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review C

ISSN

2469-9985

e-ISSN

—

Volume of the periodical

102

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

25

Pages from-to

034909

UT code for WoS article

000579957200004

EID of the result in the Scopus database

2-s2.0-85092797509