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Measurement of the Mass Difference between t and t ̄ Quarks

Aaltonen T.
•
Álvarez González B.
•
Amerio S.
altro
Zucchelli S.
2011
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We present a direct measurement of the mass difference between t and t̅ quarks using tt̅ candidate events in the lepton+jets channel, collected with the CDF II detector at Fermilab’s 1.96 TeV Tevatron pp̅ Collider. We make an event by event estimate of the mass difference to construct templates for top quark pair signal events and background events. The resulting mass difference distribution of data is compared to templates of signals and background using a maximum likelihood fit. From a sample corresponding to an integrated luminosity of 5.6 fb-1, we measure a mass difference, ΔMtop=Mt-Mt̅ =-3.3±1.4(stat)±1.0(syst) GeV/c2, approximately 2 standard deviations away from the CPT hypothesis of zero mass difference.
DOI
10.1103/PhysRevLett.106.152001
WOS
WOS:000289525300004
Archivio
http://hdl.handle.net/11390/867124
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79960621760
http://link.aps.org/doi/10.1103/PhysRevLett.106.152001
Diritti
closed access
Scopus© citazioni
39
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
26
Data di acquisizione
Mar 11, 2024
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