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Uzunyan, S; Vachon, B; van den Berg, PJ; Kooten, RV; van Leeuwen, WM; Varelas, N; Varnes, EW; Vartapetian, A; Vasilyev, IA; Vaupel, M; Verdier, P; Vertogradov, LS; Verzocchi, M; Villeneuve-Seguier, F; Vlimant, JR; Von Toerne, E; Vreeswijk, M; Anh, TV; Wahl, HD; Wang, L; Warchol, J; Watts, G; Wayne, M; Weber, M; Weerts, H; Wermes, N; Wetstein, M; White, A; White, V; Wicke, D; Wijngaarden, DA; Wilson, GW; Wimpenny, SJ; Wittlin, J; Wobisch, M; Womersley, J; Wood, DR; Wyatt, TR; Xie, Y; Xu, Q; Xuan, N; Yacoob, S; Yamada, R; Yan, M; Yasuda, T; Yatsunenko, YA; Yen, Y; Yip, K; Yoo, HD; Youn, SW; Yu, J; Yurkewicz, A; Zabi, A; Zatserklyaniy, A; Zdrazil, M; Zeitnitz, C; Zhang, D; Zhang, X; Zhao, T; Zhao, Z; Zhou, B; Zhu, J; Zielinski, M; Zieminska, D; Zieminski, A; Zitoun, R; Zutshi, V; Zverev, EG; - view fewer (2005) Measurement of the lifetime difference in the B-s(0) system. PHYS REV LETT , 95 (17) , Article 171801. 10.1103/PhysRevLett.95.171801.

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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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