Measurement of D-0-meson + hadron two-dimensional angular correlations in Au plus Au collisions at root s(NN)=200 GeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00531357" target="_blank" >RIV/61389005:_____/20:00531357 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.102.014905" target="_blank" >https://doi.org/10.1103/PhysRevC.102.014905</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.102.014905" target="_blank" >10.1103/PhysRevC.102.014905</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of D-0-meson + hadron two-dimensional angular correlations in Au plus Au collisions at root s(NN)=200 GeV

Popis výsledku v původním jazyce

Open heavy-flavor hadrons provide unique probes of the medium produced in ultrarelativistic heavy-ion collisions. Due to their increased mass relative to light-flavor hadrons, long lifetime, and early production in hard-scattering interactions, they provide access to the full evolution of the partonic medium formed in heavy-ion collisions. This paper reports two-dimensional (2D) angular correlations between neutral D mesons and unidentified charged particles produced in minimum-bias Au+Au collisions at root s(NN) = 200 GeV. D-0 and D-0 mesons are reconstructed via their weak decay to K--/+ pi(+/-) using the Heavy Flavor Tracker in the Solenoidal Tracker at RHIC experiment. Correlations on relative pseudorapidity and azimuth (Delta(eta), Delta(phi)) are presented for peripheral, midcentral, and central collisions with D-0 transverse momentum from 2-10 GeV/c. Attention is focused on the 2D peaked correlation structure near the triggered D-0 meson, the near-side (NS) peak, which serves as a proxy for a charm-quark-containing jet. The correlated NS yield of charged particles per D-0 meson and the 2D widths of the NS peak increase significantly from peripheral to central collisions. These results are compared with similar correlations using unidentified charged particles, consisting primarily of light-flavor hadrons, at similar trigger particle momenta. Similar per-trigger yields and widths of the NS correlation peak are observed. The present results provide additional evidence that D-0 mesons undergo significant interactions with the medium formed in heavy-ion collision and show, for the first time, significant centrality evolution of the NS 2D peak in the correlations of particles associated with a heavy-flavor hadron produced in these collisions.

Název v anglickém jazyce

Measurement of D-0-meson + hadron two-dimensional angular correlations in Au plus Au collisions at root s(NN)=200 GeV

Popis výsledku anglicky

Open heavy-flavor hadrons provide unique probes of the medium produced in ultrarelativistic heavy-ion collisions. Due to their increased mass relative to light-flavor hadrons, long lifetime, and early production in hard-scattering interactions, they provide access to the full evolution of the partonic medium formed in heavy-ion collisions. This paper reports two-dimensional (2D) angular correlations between neutral D mesons and unidentified charged particles produced in minimum-bias Au+Au collisions at root s(NN) = 200 GeV. D-0 and D-0 mesons are reconstructed via their weak decay to K--/+ pi(+/-) using the Heavy Flavor Tracker in the Solenoidal Tracker at RHIC experiment. Correlations on relative pseudorapidity and azimuth (Delta(eta), Delta(phi)) are presented for peripheral, midcentral, and central collisions with D-0 transverse momentum from 2-10 GeV/c. Attention is focused on the 2D peaked correlation structure near the triggered D-0 meson, the near-side (NS) peak, which serves as a proxy for a charm-quark-containing jet. The correlated NS yield of charged particles per D-0 meson and the 2D widths of the NS peak increase significantly from peripheral to central collisions. These results are compared with similar correlations using unidentified charged particles, consisting primarily of light-flavor hadrons, at similar trigger particle momenta. Similar per-trigger yields and widths of the NS correlation peak are observed. The present results provide additional evidence that D-0 mesons undergo significant interactions with the medium formed in heavy-ion collision and show, for the first time, significant centrality evolution of the NS 2D peak in the correlations of particles associated with a heavy-flavor hadron produced in these collisions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT18002" target="_blank" >LTT18002: Studium nových vlastností jaderné hmoty v mezinárodním experimentu STAR</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

—

Svazek periodika

102

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

014905

Kód UT WoS článku

000548531400005

EID výsledku v databázi Scopus

2-s2.0-85089306320