# Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector

ATLAS Collaboration

13 引文 斯高帕斯（Scopus）

## 摘要

A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≡mt−m=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.

原文 English 363-379 17 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 728 https://doi.org/10.1016/j.physletb.2013.12.010 Published - 2014 一月 20

• 核能與高能物理