Measurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at root s=8 and 13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73601339" target="_blank" >RIV/61989592:15310/20:73601339 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/20:00346774 RIV/68407700:21340/20:00346774 RIV/68407700:21670/20:00346774 RIV/00216208:11320/20:10423543

Výsledek na webu

<a href="https://link.springer.com/content/pdf/10.1140/epjc/s10052-020-7606-6.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1140/epjc/s10052-020-7606-6.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-020-7606-6" target="_blank" >10.1140/epjc/s10052-020-7606-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at root s=8 and 13 TeV

Popis výsledku v původním jazyce

Results are presented from the measurement by ATLAS of long-range (|Delta eta|&gt;2) dihadron angular correlations in root s=8 and 13 TeV pp collisions containing a Z boson. The analysis is performed using 19.4 fb-1 of root s=8 TeV data recorded during Run 1 of the LHC and 36.1 fb-1 of root s=13 TeV data recorded during Run 2. Two-particle correlation functions are measured as a function of relative azimuthal angle over the relative pseudorapidity range 2&lt;|Delta eta|&lt;5 for different intervals of charged-particle multiplicity and transverse momentum. The measurements are corrected for the presence of background charged particles generated by collisions that occur during one passage of two colliding proton bunches in the LHC. Contributions to the two-particle correlation functions from hard processes are removed using a template-fitting procedure. Sinusoidal modulation in the correlation functions is observed and quantified by the second Fourier coefficient of the correlation function, v2,2, which in turn is used to obtain the single-particle anisotropy coefficient v2. The v2 values in the Z-tagged events, integrated over 0.5&lt;pT&lt;5 GeV, are found to be independent of multiplicity and &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;, and consistent within uncertainties with previous measurements in inclusive pp collisions. As a function of charged-particle pT, the Z-tagged and inclusive v2 values are consistent within uncertainties for pT&lt;3 GeV.

Název v anglickém jazyce

Measurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at root s=8 and 13 TeV

Popis výsledku anglicky

Results are presented from the measurement by ATLAS of long-range (|Delta eta|&gt;2) dihadron angular correlations in root s=8 and 13 TeV pp collisions containing a Z boson. The analysis is performed using 19.4 fb-1 of root s=8 TeV data recorded during Run 1 of the LHC and 36.1 fb-1 of root s=13 TeV data recorded during Run 2. Two-particle correlation functions are measured as a function of relative azimuthal angle over the relative pseudorapidity range 2&lt;|Delta eta|&lt;5 for different intervals of charged-particle multiplicity and transverse momentum. The measurements are corrected for the presence of background charged particles generated by collisions that occur during one passage of two colliding proton bunches in the LHC. Contributions to the two-particle correlation functions from hard processes are removed using a template-fitting procedure. Sinusoidal modulation in the correlation functions is observed and quantified by the second Fourier coefficient of the correlation function, v2,2, which in turn is used to obtain the single-particle anisotropy coefficient v2. The v2 values in the Z-tagged events, integrated over 0.5&lt;pT&lt;5 GeV, are found to be independent of multiplicity and &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;, and consistent within uncertainties with previous measurements in inclusive pp collisions. As a function of charged-particle pT, the Z-tagged and inclusive v2 values are consistent within uncertainties for pT&lt;3 GeV.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

EUROPEAN PHYSICAL JOURNAL C

ISSN

1434-6044

e-ISSN

—

Svazek periodika

80

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

32

Strana od-do

"64-1"-"64-32"

Kód UT WoS článku

000521222100003

EID výsledku v databázi Scopus

2-s2.0-85078365024