Dielectron production in proton-proton and proton-lead collisions at root s(NN)=5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00538354" target="_blank" >RIV/61389005:_____/20:00538354 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00538354 RIV/68407700:21340/20:00346332

Result on the web

<a href="https://doi.org/10.1103/PhysRevC.102.055204" target="_blank" >https://doi.org/10.1103/PhysRevC.102.055204</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.102.055204" target="_blank" >10.1103/PhysRevC.102.055204</a>

Result language

angličtina

Original language name

Dielectron production in proton-proton and proton-lead collisions at root s(NN)=5.02 TeV

Original language description

The first measurements of dielectron production at midrapidity (vertical bar eta(e)vertical bar < 0.8) in proton-proton and proton-lead collisions at root s(NN) = 5.02 TeV at the LHC are presented. The dielectron cross section is measured with the ALICE detector as a function of the invariant mass m(ee) and the pair transverse momentum p(T,ee) in the ranges m(ee) < 3.5 GeV/c(2) and p(T,ee) < 8 GeV/c, in both collision systems. In proton-proton collisions, the charm and beauty cross sections are determined at midrapidity from a fit to the data with two different event generators. This complements the existing dielectron measurements performed at root s = 7 and 13 TeV. The slope of the root s dependence of the three measurements is described by FONLL calculations. The dielectron cross section measured in proton-lead collisions is in agreement, within the current precision, with the expected dielectron production without any nuclear matter effects for e(+)e(-) pairs from open heavy-flavor hadron decays. For the first time at LHC energies, the dielectron production in proton-lead and proton-proton collisions are directly compared at the same root s(NN) via the dielectron nuclear modification factor R-pPb. The measurements are compared to model calculations including cold nuclear matter effects, or additional sources of dielectrons from thermal radiation.

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

Result was created during the realization of more than one project. More information in the Projects tab.

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

5

Country of publishing house

US - UNITED STATES

Number of pages

21

Pages from-to

055204

UT code for WoS article

000592358300005

EID of the result in the Scopus database

2-s2.0-85097149284