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Measurement of the lifetime difference in the B-s(0) system
Baringer, Philip S. Bean, Alice Christofek, L. Coppage, Don Gardner, J. Hensel, Carsten Jabeen, S. Moulik, Tania Wilson, Graham Wallace
Baringer, Philip S.
Bean, Alice
Christofek, L.
Coppage, Don
Gardner, J.
Hensel, Carsten
Jabeen, S.
Moulik, Tania
Wilson, Graham Wallace
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Abstract
We present a study of the decay B-s(0)-> J/psi phi. We obtain the CP-odd fraction in the final state at time zero R-perpendicular to = 0.16 +/- 0.10 (stat) +/- 0.02(syst), the average lifetime of the (B-s(0), (B) over bar (0)(s)) system, (tau) over bar (B-s(0)) = 1.39(-0.16)(+0.13)(stat)(-0.02)(+0.01)(syst) ps, and the relative width difference between the heavy and light mass eigen-states, Delta Gamma/(Gamma) over bar = (Gamma(L) - Gamma(H))/(Gamma) over bar = 0.24(-0.38)(+0.28)(stat)(-0.04)(+0.03)(syst). With the additional constraint from the world average of the B-s(0) lifetime measurements using semileptonic decays, we find (tau) over bar (B-s(0)) = 1.39 +/- 0.06 ps and Delta Gamma/(Gamma) over bar = 0.25(-0.15)(+0.14). For the ratio of the B-s(0) and B-0 lifetimes we obtain (tau) over bar (B-s(0))/tau(B-s(0)) = 0.91 +/- 0.09(stat) +/- 0.003(syst).
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2005-10
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AMERICAN PHYSICAL SOC
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Abazov, VM; Abbott, B, et al. Measurement of the lifetime difference in the B-s(0) system. PHYSICAL REVIEW LETTERS. October 2005. 95(17)