Measurement of the tt production cross-section and lepton differential distributions in e mu dilepton events from pp collisions at root s=13 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602257" target="_blank" >RIV/61989592:15310/20:73602257 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/20:00346780 RIV/68407700:21340/20:00346780 RIV/68407700:21670/20:00346780 RIV/00216208:11320/20:10423558

Výsledek na webu

<a href="https://link.springer.com/article/10.1140/epjc/s10052-020-7907-9" target="_blank" >https://link.springer.com/article/10.1140/epjc/s10052-020-7907-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-020-7907-9" target="_blank" >10.1140/epjc/s10052-020-7907-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the tt production cross-section and lepton differential distributions in e mu dilepton events from pp collisions at root s=13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

The inclusive top quark pair (tt&lt;overbar&gt;&lt;/mml:mover&gt;) production cross-section sigma tt&lt;overbar&gt;&lt;/mml:mover&gt; has been measured in proton-proton collisions at &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;=13&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;TeV, using 36.1 fb-1 of data collected in 2015-2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge e mu pair and b-tagged jets, the cross-section is measured to be: &lt;disp-formula id=&quot;Equ10&quot;&gt;&lt;mml:mtable&gt;&lt;mml:mtr&gt;&lt;mml:mtd columnalign=&quot;right&quot;&gt;sigma tt&lt;overbar&gt;&lt;/mml:mover&gt;=826.4 +/- 3.6&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(stat)&lt;mml:mspace width=&quot;4pt&quot;&gt;&lt;/mml:mspace&gt;+/- 11.5&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(syst)&lt;mml:mspace width=&quot;4pt&quot;&gt;&lt;/mml:mspace&gt;+/- 15.7&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(lumi)&lt;mml:mspace width=&quot;4pt&quot;&gt;&lt;/mml:mspace&gt;+/- 1.9&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(beam)&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;pb,&lt;/mml:mtd&gt;&lt;/mml:mtr&gt;&lt;/mml:mtable&gt;&lt;graphic xmlns:xlink=&quot;http://www.w3.org/1999/xlink&quot; xlink:href=&quot;10052_2020_7907_Article_Equ10.gif&quot; position=&quot;anchor&quot;&gt;&lt;/graphic&gt;&lt;/disp-formula&gt;where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mtpole, giving mtpole=173.1-2.1+2.0&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;GeV. It is also combined with measurements at &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;&lt;mml:mo&gt;=7&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;TeV and &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;&lt;mml:mo&gt;=8&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;TeV to derive ratios and double ratios of t&lt;mml:mover accent=&quot;true&quot;&gt;t&lt;mml:mo stretchy=&quot;false&quot;&gt;&lt;overbar&gt;&lt;/mml:mover&gt; and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.

Název v anglickém jazyce

Measurement of the tt production cross-section and lepton differential distributions in e mu dilepton events from pp collisions at root s=13 TeV with the ATLAS detector

Popis výsledku anglicky

The inclusive top quark pair (tt&lt;overbar&gt;&lt;/mml:mover&gt;) production cross-section sigma tt&lt;overbar&gt;&lt;/mml:mover&gt; has been measured in proton-proton collisions at &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;=13&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;TeV, using 36.1 fb-1 of data collected in 2015-2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge e mu pair and b-tagged jets, the cross-section is measured to be: &lt;disp-formula id=&quot;Equ10&quot;&gt;&lt;mml:mtable&gt;&lt;mml:mtr&gt;&lt;mml:mtd columnalign=&quot;right&quot;&gt;sigma tt&lt;overbar&gt;&lt;/mml:mover&gt;=826.4 +/- 3.6&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(stat)&lt;mml:mspace width=&quot;4pt&quot;&gt;&lt;/mml:mspace&gt;+/- 11.5&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(syst)&lt;mml:mspace width=&quot;4pt&quot;&gt;&lt;/mml:mspace&gt;+/- 15.7&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(lumi)&lt;mml:mspace width=&quot;4pt&quot;&gt;&lt;/mml:mspace&gt;+/- 1.9&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;(beam)&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;pb,&lt;/mml:mtd&gt;&lt;/mml:mtr&gt;&lt;/mml:mtable&gt;&lt;graphic xmlns:xlink=&quot;http://www.w3.org/1999/xlink&quot; xlink:href=&quot;10052_2020_7907_Article_Equ10.gif&quot; position=&quot;anchor&quot;&gt;&lt;/graphic&gt;&lt;/disp-formula&gt;where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mtpole, giving mtpole=173.1-2.1+2.0&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;GeV. It is also combined with measurements at &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;&lt;mml:mo&gt;=7&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;TeV and &lt;mml:msqrt&gt;s&lt;/mml:msqrt&gt;&lt;mml:mo&gt;=8&lt;mml:mspace width=&quot;0.166667em&quot;&gt;&lt;/mml:mspace&gt;TeV to derive ratios and double ratios of t&lt;mml:mover accent=&quot;true&quot;&gt;t&lt;mml:mo stretchy=&quot;false&quot;&gt;&lt;overbar&gt;&lt;/mml:mover&gt; and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.

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

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

70

Strana od-do

"528-1"-"528-70"

Kód UT WoS článku

000546998500003

EID výsledku v databázi Scopus

2-s2.0-85086475740