Measurement of the charge asymmetry in highly boosted top-quark pair production in s = 8 TeV pp collision data collected by the ATLAS experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00466020" target="_blank" >RIV/68378271:_____/16:00466020 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2016.02.055" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2016.02.055</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2016.02.055" target="_blank" >10.1016/j.physletb.2016.02.055</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the charge asymmetry in highly boosted top-quark pair production in s = 8 TeV pp collision data collected by the ATLAS experiment

Popis výsledku v původním jazyce

In the pptt process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb 1 of pp collision data at s=8TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair ( mtt>0.75 TeV ) and an absolute rapidity difference of the top and anti-top quark candidates within 2<|yt||yt|<2 is measured to be 4.23.2% , in agreement with the Standard Model prediction at next-to-leading order. A differential measurement in three tt mass bins is also presented.nn

Název v anglickém jazyce

Measurement of the charge asymmetry in highly boosted top-quark pair production in s = 8 TeV pp collision data collected by the ATLAS experiment

Popis výsledku anglicky

In the pptt process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb 1 of pp collision data at s=8TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair ( mtt>0.75 TeV ) and an absolute rapidity difference of the top and anti-top quark candidates within 2<|yt||yt|<2 is measured to be 4.23.2% , in agreement with the Standard Model prediction at next-to-leading order. A differential measurement in three tt mass bins is also presented.nn

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

756

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

20

Strana od-do

52-71

Kód UT WoS článku

000373569200008

EID výsledku v databázi Scopus

2-s2.0-84960403300