Exclusive dielectron production in ultraperipheral Pb+Pb collisions at psNN = 5.02 TeV with ATLAS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475977" target="_blank" >RIV/00216208:11320/23:10475977 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lBNwuQF25e" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lBNwuQF25e</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP06(2023)182" target="_blank" >10.1007/JHEP06(2023)182</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Exclusive dielectron production in ultraperipheral Pb+Pb collisions at psNN = 5.02 TeV with ATLAS

Popis výsledku v původním jazyce

Exclusive production of dielectron pairs, ! e+e-, is studied using Lint =1.72 nb-1 of data from ultraperipheral collisions of lead nuclei at psNN = 5.02TeV recordedby the ATLAS detector at the LHC. The process of interest proceeds via photon-photoninteractions in the strong electromagnetic fields of relativistic lead nuclei. Dielectron productionis measured in the fiducial region defined by following requirements: electron transversemomentum peT &gt; 2.5 GeV, absolute electron pseudorapidity |e| &lt; 2.5, dielectron invariantmass mee &gt; 5 GeV, and dielectron transverse momentum peeT &lt; 2 GeV. Differentialcross-sections are measured as a function of mee, average peT, absolute dielectron rapidity|yee|, and scattering angle in the dielectron rest frame, | cos |, in the inclusive sample,and also with a requirement of no activity in the forward direction. The total integratedfiducial cross-section is measured to be 215 +- 1(stat.) +23-20(syst.) +- 4(lumi.) μb. Within experimentaluncertainties the measured integrated cross-section is in good agreement withthe QED predictions from the Monte Carlo programs Starlight and SuperChic, confirmingthe broad features of the initial photon fluxes. The differential cross-sections showsystematic differences from these predictions which are more pronounced at high |yee| and| cos | values.

Název v anglickém jazyce

Exclusive dielectron production in ultraperipheral Pb+Pb collisions at psNN = 5.02 TeV with ATLAS

Popis výsledku anglicky

Exclusive production of dielectron pairs, ! e+e-, is studied using Lint =1.72 nb-1 of data from ultraperipheral collisions of lead nuclei at psNN = 5.02TeV recordedby the ATLAS detector at the LHC. The process of interest proceeds via photon-photoninteractions in the strong electromagnetic fields of relativistic lead nuclei. Dielectron productionis measured in the fiducial region defined by following requirements: electron transversemomentum peT &gt; 2.5 GeV, absolute electron pseudorapidity |e| &lt; 2.5, dielectron invariantmass mee &gt; 5 GeV, and dielectron transverse momentum peeT &lt; 2 GeV. Differentialcross-sections are measured as a function of mee, average peT, absolute dielectron rapidity|yee|, and scattering angle in the dielectron rest frame, | cos |, in the inclusive sample,and also with a requirement of no activity in the forward direction. The total integratedfiducial cross-section is measured to be 215 +- 1(stat.) +23-20(syst.) +- 4(lumi.) μb. Within experimentaluncertainties the measured integrated cross-section is in good agreement withthe QED predictions from the Monte Carlo programs Starlight and SuperChic, confirmingthe broad features of the initial photon fluxes. The differential cross-sections showsystematic differences from these predictions which are more pronounced at high |yee| and| cos | values.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2023

Číslo periodika v rámci svazku

06

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

42

Strana od-do

182

Kód UT WoS článku

001069745300005

EID výsledku v databázi Scopus

2-s2.0-85163887123