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10.1016-j.physletb.2013.12.010.pdf (1.11 MB)

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

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journal contribution
posted on 2023-06-09, 06:11 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb-14.7 fb-¹ data sample of proton–proton collisions at vs=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 ?m=mt-mt¯=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.

Funding

ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Physics Letters B

ISSN

0370-2693

Publisher

Elsevier

Volume

728

Page range

363-379

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-05-08

First Open Access (FOA) Date

2017-05-08

First Compliant Deposit (FCD) Date

2017-05-08

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