Publications [#308138] of Ashutosh V. Kotwal

Papers Published
  1. Abazov, VM; Abbott, B; Abolins, M; Acharya, BS; Adams, DL; Adams, M; Adams, T; Agelou, M; Agram, J-L; Ahmed, SN; Ahn, SH; Alexeev, GD; Alkhazov, G; Alton, A; Alverson, G; Alves, GA; Anastasoaie, M; Anderson, S; Andrieu, B; Arnoud, Y; Askew, A; Åsman, B; Atramentov, O; Autermann, C; Avila, C; Babukhadia, L; Bacon, TC; Badaud, F; Baden, A; Baffioni, S; Baldin, B; Balm, PW; Banerjee, S; Barberis, E; Bargassa, P; Baringer, P; Barnes, C; Barreto, J; Bartlett, JF; Bassler, U; Bauer, D; Bean, A et al., Measurement of the Bs0 lifetime in the exclusive decay channel Bs0 → J/ψφ, Physical Review Letters, vol. 94 no. 4 (2005) [doi] .

    Using the exclusive decay Bs0 → J/ψ (μ+μ-)φ (K+K-), we report the most precise single measurement of the Bs0 lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb-1 collected with the DO detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signal candidates, from which we extract the Bs0 lifetime, τ(Bs0) = 1.444-0.090+0.098(stat) ± 0.020(sys) ps. We also report a measurement for the lifetime of the B0 meson using the exclusive decay B0 → J/ψ(μ+μ-) K*0(&92)(K+π-). We reconstruct 1370 signal candidates, obtaining τ(B0) = 1.473 -0.050+0.052(stat)±0.023(sys) ps, and the ratio of lifetimes, τ(Bs0)/τ(B0) = 0.980 -0.0.710.076(stat) ± 0.003(sys). © 2005 The American Physical Society.