Exclusive dielectron production in ultraperipheral Pb plus Pb collisions at √sNN=5.02 TeV with ATLAS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F23%3A73621495" target="_blank" >RIV/61989592:15310/23:73621495 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/JHEP06(2023)182" target="_blank" >https://link.springer.com/article/10.1007/JHEP06(2023)182</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 plus Pb collisions at √sNN=5.02 TeV with ATLAS

Popis výsledku v původním jazyce

Exclusive production of dielectron pairs, gamma gamma -&gt; e(+) e(-), is studied using L-int = 1.72 nb(-1) of data from ultraperipheral collisions of lead nuclei at root s(NN) = 5.02TeV recorded by the ATLAS detector at the LHC. The process of interest proceeds via photon-photon interactions in the strong electromagnetic fields of relativistic lead nuclei. Dielectron production is measured in the fiducial region defined by following requirements: electron transverse momentum p(T)(e) &gt; 2.5 GeV, absolute electron pseudorapidity |eta(e)| &lt; 2.5, dielectron invariant mass m(ee) &gt; 5 GeV, and dielectron transverse momentum p(T)(ee) &lt; 2 GeV. Differential cross-sections are measured as a function of mee, average peT, absolute dielectron rapidity |y(ee)|, and scattering angle in the dielectron rest frame, | cos theta* |, in the inclusive sample, and also with a requirement of no activity in the forward direction. The total integrated fiducial cross-section is measured to be 215 +/- 1(stat.) (+23)(-20)(syst.) +/- 4(lumi.) mu b. Within experimental uncertainties the measured integrated cross-section is in good agreement with the QED predictions from the Monte Carlo programs Starlight and SuperChic, confirming the broad features of the initial photon fluxes. The differential cross-sections show systematic differences from these predictions which are more pronounced at high |y(ee)| and | cos theta* | values.

Název v anglickém jazyce

Exclusive dielectron production in ultraperipheral Pb plus Pb collisions at √sNN=5.02 TeV with ATLAS

Popis výsledku anglicky

Exclusive production of dielectron pairs, gamma gamma -&gt; e(+) e(-), is studied using L-int = 1.72 nb(-1) of data from ultraperipheral collisions of lead nuclei at root s(NN) = 5.02TeV recorded by the ATLAS detector at the LHC. The process of interest proceeds via photon-photon interactions in the strong electromagnetic fields of relativistic lead nuclei. Dielectron production is measured in the fiducial region defined by following requirements: electron transverse momentum p(T)(e) &gt; 2.5 GeV, absolute electron pseudorapidity |eta(e)| &lt; 2.5, dielectron invariant mass m(ee) &gt; 5 GeV, and dielectron transverse momentum p(T)(ee) &lt; 2 GeV. Differential cross-sections are measured as a function of mee, average peT, absolute dielectron rapidity |y(ee)|, and scattering angle in the dielectron rest frame, | cos theta* |, in the inclusive sample, and also with a requirement of no activity in the forward direction. The total integrated fiducial cross-section is measured to be 215 +/- 1(stat.) (+23)(-20)(syst.) +/- 4(lumi.) mu b. Within experimental uncertainties the measured integrated cross-section is in good agreement with the QED predictions from the Monte Carlo programs Starlight and SuperChic, confirming the broad features of the initial photon fluxes. The differential cross-sections show systematic differences from these predictions which are more pronounced at high |y(ee)| and | cos theta* | values.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

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

—

Svazek periodika

2023

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

42

Strana od-do

"182-1"-"182-42"

Kód UT WoS článku

001069745300005

EID výsledku v databázi Scopus

2-s2.0-85163887123