Direct measurement of the mass difference between top and antitop quarks

We present a measurement of the mass difference between t and t[over] quarks in lepton + jets final states of tt[over] events in 1 fb;{-1} of data collected with the D0 detector from Fermilab Tevatron Collider pp[over] collisions at sqrt[s] = 1.96 TeV. The measured mass difference of 3.8 +/- 3.7 GeV...

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Veröffentlicht in:	Physical review letters 2009-09, Vol.103 (13), p.132001-132001, Article 132001
Hauptverfasser:	Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, M, Adams, T, Aguilo, E, Ahsan, M, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Ancu, L S, Andeen, T, Anzelc, M S, Aoki, M, Arnoud, Y, Arov, M, Arthaud, M, Askew, A, Asman, B, Atramentov, O, Avila, C, Backusmayes, J, Badaud, F, Bagby, L, Baldin, B, Bandurin, D V, Banerjee, S, Barberis, E, Barfuss, A-F, Bargassa, P, Baringer, P, Barreto, J, Bartlett, J F, Bassler, U, Bauer, D, Beale, S, Bean, A, Begalli, M, Begel, M, Belanger-Champagne, C, Bellantoni, L, Bellavance, A, Benitez, J A, Beri, S B, Bernardi, G, Bernhard, R, Bertram, I, Besançon, M, Beuselinck, R, Bezzubov, V A, Bhat, P C, Bhatnagar, V, Blazey, G, Blessing, S, Bloom, K, Boehnlein, A, Boline, D, Bolton, T A, Boos, E E, Borissov, G, Bose, T, Brandt, A, Brock, R, Brooijmans, G, Bross, A, Brown, D, Bu, X B, Buchholz, D, Buehler, M, Buescher, V, Bunichev, V, Burdin, S, Burnett, T H, Buszello, C P, Calfayan, P, Calpas, B, Calvet, S, Cammin, J, Carrasco-Lizarraga, M A, Carrera, E, Carvalho, W, Casey, B C K, Castilla-Valdez, H, Chakrabarti, S, Chakraborty, D, Chan, K M, Chandra, A, Cheu, E, Cho, D K, Choi, S, Choudhary, B, Christoudias, T, Cihangir, S, Claes, D, Clutter, J, Cooke, M, Cooper, W E
Format:	Artikel
Sprache:	eng
Schlagworte:	ACCELERATORS ANTIMATTER ANTIPARTICLES ANTIQUARKS BARYON-BARYON INTERACTIONS CYCLIC ACCELERATORS Elementarpartikelfysik Elementary particle physics ELEMENTARY PARTICLES ENERGY RANGE FERMILAB TEVATRON FERMIONS Fysik GEV RANGE GEV RANGE 01-10 HADRON-HADRON INTERACTIONS High Energy Physics - Experiment INTERACTIONS LEPTONS MASS DIFFERENCE MATTER NATURAL SCIENCES NATURVETENSKAP NUCLEON-NUCLEON INTERACTIONS PARTICLE INTERACTIONS PARTICLE PROPERTIES Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POSTULATED PARTICLES PROTON-NUCLEON INTERACTIONS PROTON-PROTON INTERACTIONS QUARKS SYNCHROTRONS T ANTIQUARKS T QUARKS TEV RANGE TEV RANGE 01-10 TOP PARTICLES
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Zusammenfassung:	We present a measurement of the mass difference between t and t[over] quarks in lepton + jets final states of tt[over] events in 1 fb;{-1} of data collected with the D0 detector from Fermilab Tevatron Collider pp[over] collisions at sqrt[s] = 1.96 TeV. The measured mass difference of 3.8 +/- 3.7 GeV is consistent with the equality of t and t[over ] masses. This is the first direct measurement of a mass difference between a quark and its antiquark partner.
ISSN:	0031-9007 1079-7114 1079-7114
DOI:	10.1103/physrevlett.103.132001