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Precision Measurement of the Ratio B(t -> Wb)/B(t -> Wq) and Extraction of V(tb)

作者	Abazov, VM; Abbott, B; Acharya, BS; Adams, M; Adams, T; Alexeev, GD; Alkhazov, G; Alton, A; Alverson, G; Alves, GA; Aoki, M; Arov, M; Askew, A; Asman, B; Atramentov, O; Avila, C; BackusMayes, J; Badaud, F; Bagby, L; Baldin, B; Bandurin, DV; Banerjee, S; Barberis, E; Baringer, P; Barreto, J; Bartlett, JF; Bassler, U; Bazterra, V; Beale, S; Bean, A; Begalli, M; Begel, M; Belanger-Champagne, C; Bellantoni, L; Beri, SB; Bernardi, G; Bernhard, R; Bertram, I; Besancon, M; Beuselinck, R; Bezzubov, VA; Bhat, PC; Bhatnagar, V; Blazey, G; Blessing, S; Bloom, K; Boehnlein, A; Boline, D; Boos, EE; Borissov, G; Bose, T; Brandt, A; Brandt, O; Brock, R; Brooijmans, G; Bross, A; Brown, D; Brown, J; Bu, XB; Buehler, M; Buescher, V; Bunichev, V; Burdin, S; Burnett, TH; Buszello, CP; Calpas, B; Camacho-Perez, E; Carrasco-Lizarraga, MA; Casey, BCK; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, KM; Chandra, A; Chen, G; Chevalier-Thery, S; Cho, DK; Cho, SW; Choi, S; Choudhary, B; Cihangir, S; Cl

选自	期刊 PHYSICAL REVIEW LETTERS; 卷期 2011年107-12; 页码 121802-121802

关联知识点

[摘要]：We present a measurement of the ratio of top quark branching fractions R = B(t -> Wb)/B(t -> Wq), where q can be a d, s, or b quark, in the lepton + jets and dilepton t (t) over bar final states. The measurement uses data from 5: 4 fb(-1) of p (p) over bar collisions collected with the D0 detector at the Fermilab Tevatron Collider. We measure R = 0.90 +/- 0.04, and we extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element vertical bar V(tb)vertical bar as vertical bar V(tb)vertical bar = 0.95 +/- 0.02, assuming unitarity of the 3 x 3 CKM matrix.
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