Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00531354" target="_blank" >RIV/61389005:_____/20:00531354 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/20:00531354 RIV/68407700:21340/20:00342790

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2020.135377" target="_blank" >https://doi.org/10.1016/j.physletb.2020.135377</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2020.135377" target="_blank" >10.1016/j.physletb.2020.135377</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV

Popis výsledku v původním jazyce

The differential invariant yield as a function of transverse momentum (p(T)) of electrons from semileptonic heavy-flavour hadron decays was measured at midrapidity in central (0-10%), semi-central (30-50%) and peripheral (60-80%) lead-lead (Pb- Pb) collisions at root s(NN) = 5.02 TeV in the p(T) intervals 0.5-26GeV/c( 0-10% and 30-50%) and 0.5-10 GeV/c (60-80%). The production cross section in proton-proton (pp) collisions at root s = 5.02 TeV was measured as well in 0.5 < pT< 10GeV/c and it lies close to the upper band of perturbative QCD calculation uncertainties up to p(T) = 5 GeV/c and close to the mean value for larger p(T). The modification of the electron yield with respect to what is expected for an incoherent superposition of nucleon-nucleon collisions is evaluated by measuring the nuclear modification factor R-AA. The measurement of the R-AA in different centrality classes allows in-medium energy loss of charm and beauty quarks to be investigated. The R-AA shows a suppression with respect to unity at intermediate p(T), which increases while moving towards more central collisions. Moreover, the measured R-AA is sensitive to the modification of the parton distribution functions (PDF) in nuclei, like nuclear shadowing, which causes a suppression of the heavy-quark production at low p(T) in heavy-ion collisions at LHC.

Název v anglickém jazyce

Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at root s(NN)=5.02 TeV

Popis výsledku anglicky

The differential invariant yield as a function of transverse momentum (p(T)) of electrons from semileptonic heavy-flavour hadron decays was measured at midrapidity in central (0-10%), semi-central (30-50%) and peripheral (60-80%) lead-lead (Pb- Pb) collisions at root s(NN) = 5.02 TeV in the p(T) intervals 0.5-26GeV/c( 0-10% and 30-50%) and 0.5-10 GeV/c (60-80%). The production cross section in proton-proton (pp) collisions at root s = 5.02 TeV was measured as well in 0.5 < pT< 10GeV/c and it lies close to the upper band of perturbative QCD calculation uncertainties up to p(T) = 5 GeV/c and close to the mean value for larger p(T). The modification of the electron yield with respect to what is expected for an incoherent superposition of nucleon-nucleon collisions is evaluated by measuring the nuclear modification factor R-AA. The measurement of the R-AA in different centrality classes allows in-medium energy loss of charm and beauty quarks to be investigated. The R-AA shows a suppression with respect to unity at intermediate p(T), which increases while moving towards more central collisions. Moreover, the measured R-AA is sensitive to the modification of the parton distribution functions (PDF) in nuclei, like nuclear shadowing, which causes a suppression of the heavy-quark production at low p(T) in heavy-ion collisions at LHC.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

804

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

135377

Kód UT WoS článku

000548740300023

EID výsledku v databázi Scopus

2-s2.0-85082556173