Inclusive-photon production and its dependence on photon isolation in pp collisions at CMS = 13 TeV using 139 fb-1 of ATLAS data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476268" target="_blank" >RIV/00216208:11320/23:10476268 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=kx4rorVkvy" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=kx4rorVkvy</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP07(2023)086" target="_blank" >10.1007/JHEP07(2023)086</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Inclusive-photon production and its dependence on photon isolation in pp collisions at CMS = 13 TeV using 139 fb-1 of ATLAS data

Popis výsledku v původním jazyce

Measurements of differential cross sections are presented for inclusive isolatedphotonproduction in pp collisions at a centre-of-mass energy of 13TeV provided by theLHC and using 139 fb-1 of data recorded by the ATLAS experiment. The cross sectionsare measured as functions of the photon transverse energy in different regions of photonpseudorapidity. The photons are required to be isolated by means of a fixed-cone methodwith two different cone radii. The dependence of the inclusive-photon production on thephoton isolation is investigated by measuring the fiducial cross sections as functions of theisolation-cone radius and the ratios of the differential cross sections with different radii indifferent regions of photon pseudorapidity. The results presented in this paper constitutean improvement with respect to those published by ATLAS earlier: the measurementsare provided for different isolation radii and with a more granular segmentation in photonpseudorapidity that can be exploited in improving the determination of the proton partondistribution functions. These improvements provide a more in-depth test of the theoreticalpredictions. Next-to-leading-order QCD predictions from JETPHOX and SHERPA andnext-to-next-to-leading-order QCD predictions from NNLOJET are compared to the measurements,using several parameterisations of the proton parton distribution functions. Themeasured cross sections are well described by the fixed-order QCD predictions within theexperimental and theoretical uncertainties in most of the investigated phase-space region.

Název v anglickém jazyce

Inclusive-photon production and its dependence on photon isolation in pp collisions at CMS = 13 TeV using 139 fb-1 of ATLAS data

Popis výsledku anglicky

Measurements of differential cross sections are presented for inclusive isolatedphotonproduction in pp collisions at a centre-of-mass energy of 13TeV provided by theLHC and using 139 fb-1 of data recorded by the ATLAS experiment. The cross sectionsare measured as functions of the photon transverse energy in different regions of photonpseudorapidity. The photons are required to be isolated by means of a fixed-cone methodwith two different cone radii. The dependence of the inclusive-photon production on thephoton isolation is investigated by measuring the fiducial cross sections as functions of theisolation-cone radius and the ratios of the differential cross sections with different radii indifferent regions of photon pseudorapidity. The results presented in this paper constitutean improvement with respect to those published by ATLAS earlier: the measurementsare provided for different isolation radii and with a more granular segmentation in photonpseudorapidity that can be exploited in improving the determination of the proton partondistribution functions. These improvements provide a more in-depth test of the theoreticalpredictions. Next-to-leading-order QCD predictions from JETPHOX and SHERPA andnext-to-next-to-leading-order QCD predictions from NNLOJET are compared to the measurements,using several parameterisations of the proton parton distribution functions. Themeasured cross sections are well described by the fixed-order QCD predictions within theexperimental and theoretical uncertainties in most of the investigated phase-space region.

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

07

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

71

Strana od-do

86

Kód UT WoS článku

001062449200001

EID výsledku v databázi Scopus

2-s2.0-85165305389