Measurement of the B0s lifetime in the exclusive decay channel B0s-->J/psiphi

Measurement of the B0s lifetime in the exclusive decay channel B0s-->J/psiphi

Using the exclusive decay B0s-->J/psi(mu+mu-)phi(K+K-), we report the most precise single measurement of the B0s lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb(-1) collected with the D0 detector at the Fermilab Tevatron Collider in 2002-2004. We reconstr...

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Veröffentlicht in:Physical review letters 2005-02, Vol.94 (4), p.042001-042001
Hauptverfasser: Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, D L, Adams, M, Adams, T, Agelou, M, Agram, J-L, Ahmed, S N, Ahn, S H, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Anastasoaie, M, Anderson, S, Andrieu, B, Arnoud, Y, Askew, A, Asman, B, Atramentov, O, Autermann, C, Avila, C, Babukhadia, L, Bacon, T C, Badaud, F, Baden, A, Baffioni, S, Baldin, B, Balm, P W, Banerjee, S, Barberis, E, Bargassa, P, Baringer, P, Barnes, C, Barreto, J, Bartlett, J F, Bassler, U, Bauer, D, Bean, A, Beauceron, S, Beaudette, F, Begel, M, Bellavance, A, Beri, S B, Bernardi, G, Bernhard, R, Bertram, I, Besançon, M, Besson, A, Beuselinck, R, Bezzubov, V A, Bhat, P C, Bhatnagar, V, Bhattacharjee, M, Binder, M, Bischoff, A, Black, K M, Blackler, I, Blazey, G, Blekman, F, Blessing, S, Bloch, D, Blumenschein, U, Boehnlein, A, Boeriu, O, Bolton, T A, Bonamy, P, Borcherding, F, Borissov, G, Bos, K, Bose, T, Boswell, C, Brandt, A, Briskin, G, Brock, R, Brooijmans, G, Bross, A, Buchanan, N J, Buchholz, D, Buehler, M, Buescher, V, Burdin, S, Burnett, T H, Busato, E, Butler, J M, Bystricky, J, Canelli, F, Carvalho, W, Casey, B C K, Casey, D, Cason, N M, Castilla-Valdez, H, Chakrabarti, S, Chakraborty, D, Chan, K M, Chandra, A, Chapin, D
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Zusammenfassung:Using the exclusive decay B0s-->J/psi(mu+mu-)phi(K+K-), we report the most precise single measurement of the B0s lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb(-1) collected with the D0 detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signal candidates, from which we extract the B0s lifetime, tau(B0s)=1.444(+0.098)(-0.090)(stat)+/-0.020(sys) ps. We also report a measurement for the lifetime of the B0 meson using the exclusive decay B0-->J/psi(mu+mu-)K*0(892)(K+pi-). We reconstruct 1370 signal candidates, obtaining tau(B0)=1.473(+0.052)(-0.050)(stat)+/-0.023(sys) ps, and the ratio of lifetimes, tau(B0s)/tau(B0)=0.980(+0.076)(-0.071)(stat)+/-0.003(sys).
ISSN:0031-9007