Direct Measurement of the Mass Difference between Top and Antitop Quarks
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Amer Physical Soc
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American Physical Society (APS)
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We present a measurement of the mass difference between t and (t) over bar quarks in lepton + jets final states of t (t) over bar events in 1 fb(-1) of data collected with the D0 detector from Fermilab Tevatron Collider p (p) over bar collisions at root s = 1.96 TeV. The measured mass difference of 3.8 +/- 3.7 GeV is consistent with the equality of t and (t) over bar masses. This is the first direct measurement of a mass difference between a quark and its antiquark partner.
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Physical Review Letters. College Pk: Amer Physical Soc, v. 103, n. 13, 7 p., 2009.
