Measurement of the mass difference between top and anti-top quarks in pp collisions at root using the atlas detector
2014 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 728, 363-379 p.Article in journal (Refereed) Published
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 root s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with t (t) over bar 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 Delta m = m(t) - m((t) over bar) = 0.67 +/- 0.61 (stat) +/- 0.41 (syst) GeV, consistent with CPT invariance.
Place, publisher, year, edition, pages
2014. Vol. 728, 363-379 p.
IdentifiersURN: urn:nbn:se:uu:diva-221689DOI: 10.1016/j.physletb.2013.12.010ISI: 000330556000059OAI: oai:DiVA.org:uu-221689DiVA: diva2:709936
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1016/j.physletb.2013.12.0102014-04-032014-04-032014-10-13Bibliographically approved