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Direct measurement of the mass difference between top and antitop quarks

Research output: Contribution to journalJournal article

Published

Article number132001
Journal publication date21/09/2009
JournalPhysical Review Letters
Journal number13
Volume103
Number of pages7
Original languageEnglish

Abstract

We present a measurement of the mass difference between t and tbar quarks observed in lepton+jets final states of ttbar events in 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider in ppbar collisions at sqrt(s)=1.96 TeV. The observed mass difference of 3.8+-3.7 GeV is consistent with the equality of t and tbar masses. This is the first direct measurement of a mass difference between a quark and its antiquark partner.

Bibliographic note

© 2009 The American Physical Society submitted to Phys. Rev. Letters