Measurement of the Bs(0) lifetime using semileptonic decays

• Published in: Physical review letters 2006-12, Vol.97 (24), p.241801-241801
• Main Authors: Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, M, Adams, T, Agelou, M, Agram, J-L, Ahn, S H, Ahsan, M, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Anastasoaie, M, Andeen, T, Anderson, S, Andrieu, B, Anzelc, M S, Arnoud, Y, Arov, M, Askew, A, Asman, B, Jesus, A C S Assis, Atramentov, O, Autermann, C, Avila, C, Ay, C, Badaud, F, Baden, A, Bagby, L, Baldin, B, Bandurin, D V, Banerjee, P, Banerjee, S, Barberis, E, Bargassa, P, Baringer, P, Barnes, C, Barreto, J, Bartlett, J F, Bassler, U, Bauer, D, Bean, A, Begalli, M, Begel, M, Belanger-Champagne, C, Bellavance, A, Benitez, J A, Beri, S B, Bernardi, G, Bernhard, R, Berntzon, L, Bertram, I, Besançon, M, Beuselinck, R, Bezzubov, V A, Bhat, P C, Bhatnagar, V, Binder, M, Biscarat, C, Black, K M, Blackler, I, Blazey, G, Blekman, F, Blessing, S, Bloch, D, Bloom, K, Blumenschein, U, Boehnlein, A, Boeriu, O, Bolton, T A, Borcherding, F, Borissov, G, Bos, K, Bose, T, Brandt, A, Brock, R, Brooijmans, G, Bross, A, Brown, D, Buchanan, N J, Buchholz, D, Buehler, M, Buescher, V, Burdin, S, Burke, S, Burnett, T H, Busato, E, Buszello, C P, Butler, J M, Calvet, S, Cammin, J, Caron, S, Carrasco-Lizarraga, M A, Carvalho, W, Casey, B C K, Cason, N M, Castilla-Valdez, H
• Format: Article
• Language: English
• ISSN: 0031-9007

We report a measurement of the Bs(0) lifetime in the semileptonic decay channel Bs(0) --> Ds- mu+ nuX (and its charge conjugate), using approximately 0.4 fb(-1) of data collected with the D0 detector during 2002-2004. Using 5176 reconstructed Ds- mu+ signal events, we have measured the Bs(0) lifetime to be tau(Bs(0))=1.398+/-0.044(stat)(-0.025)(+0.028)(syst) ps. This is the most precise measurement of the Bs(0) lifetime to date.