Top-quark mass measurement from dilepton events at CDF II

We report a measurement of the top-quark mass using events collected by the CDF II detector from pp collisions at square root of s = 1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt --> bl(-)nu(l)bl'+ nu'(...

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Veröffentlicht in:	Physical review letters 2006-04, Vol.96 (15), p.152002-152002, Article 152002
Hauptverfasser:	Abulencia, A, Acosta, D, Adelman, J, Affolder, T, Akimoto, T, Albrow, M G, Ambrose, D, Amerio, S, Amidei, D, Anastassov, A, Anikeev, K, Annovi, A, Antos, J, Aoki, M, Apollinari, G, Arguin, J-F, Arisawa, T, Artikov, A, Ashmanskas, W, Attal, A, Azfar, F, Azzi-Bacchetta, P, Azzurri, P, Bacchetta, N, Bachacou, H, Badgett, W, Barbaro-Galtieri, A, Barnes, V E, Barnett, B A, Baroiant, S, Bartsch, V, Bauer, G, Bedeschi, F, Behari, S, Belforte, S, Bellettini, G, Bellinger, J, Belloni, A, Ben-Haim, E, Benjamin, D, Beretvas, A, Beringer, J, Berry, T, Bhatti, A, Binkley, M, Bisello, D, Bishai, M, Blair, R E, Blocker, C, Bloom, K, Blumenfeld, B, Bocci, A, Bodek, A, Boisvert, V, Bolla, G, Bolshov, A, Bortoletto, D, Boudreau, J, Bourov, S, Boveia, A, Brau, B, Bromberg, C, Brubaker, E, Budagov, J, Budd, H S, Budd, S, Burkett, K, Busetto, G, Bussey, P, Byrum, K L, Cabrera, S, Campanelli, M, Campbell, M, Canelli, F, Canepa, A, Carlsmith, D, Carosi, R, Carron, S, Casarsa, M, Castro, A, Catastini, P, Cauz, D, Cavalli-Sforza, M, Cerri, A, Cerrito, L, Chang, S H, Chapman, J, Chen, Y C, Chertok, M, Chiarelli, G, Chlachidze, G, Chlebana, F, Cho, I, Cho, K, Chokheli, D, Chou, J P, Chu, P H, Chuang, S H, Chung, K, Chung, W H
Format:	Artikel
Sprache:	eng
Schlagworte:	FERMILAB COLLIDER DETECTOR FERMILAB TEVATRON GEV RANGE 100-1000 INCLUSIVE INTERACTIONS MASS MATRIX ELEMENTS PARTICLE DECAY PARTICLE PRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PROTON-PROTON INTERACTIONS STANDARD MODEL T QUARKS TEV RANGE 01-10
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Beschreibung
Zusammenfassung:	We report a measurement of the top-quark mass using events collected by the CDF II detector from pp collisions at square root of s = 1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt --> bl(-)nu(l)bl'+ nu'(l) decays. The likelihood is formed as the convolution of the leading-order matrix element and detector resolution functions. The joint likelihood is the product of likelihoods for each of 33 events collected in 340 pb(-1) of integrated luminosity, yielding a top-quark mass M(t) = 165.2 +/- 6.1(stat) +/- 3.4(syst) GeV/c2. This first application of a matrix-element technique to tt --> bl+ nu(l)bl'- nu(l') decays gives the most precise single measurement of M(t) in dilepton events. Combined with other CDF run II measurements using dilepton events, we measure M(t) = 167.9 +/- 5.2(stat) +/- 3.7(syst) GeV/c2.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.96.152002