We report the observation of B s 0- B̄ s 0 oscillations from a time-dependent measurement of the B s 0-B̄ s 0 oscillation frequency Δm s. Using a data sample of 1 fb -1 of pp collisions at √ = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, we find signals of 5600 fully reconstructed hadronic B s decays, 3100 partially reconstructed hadronic B s decays, and 61500 partially reconstructed semileptonic B s decays. We measure the probability as a function of proper decay time that the B s decays with the same, or opposite, flavor as the flavor at production, and we find a signal for B s 0-B̄ s 0 oscillations. The probability that random fluctuations could produce a comparable signal is 8 × 10 -8, which exceeds 5σ significance. We measure Δm s = 17.77 ± 0.10(stat) ± 0.07(syst) ps -1 and extract |V td/V ts| = 0.2060 ± 0.0007(Δm s) -0.0060 +0.0081 (Δm d + theor).

CDF Collaboration, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, et al. (2006). Observation of B0(s)-B-bar0_s Oscillations. PHYSICAL REVIEW LETTERS, 97(24), 1-7 [10.1103/PhysRevLett.97.242003].

Observation of B0(s)-B-bar0_s Oscillations

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2006

Abstract

We report the observation of B s 0- B̄ s 0 oscillations from a time-dependent measurement of the B s 0-B̄ s 0 oscillation frequency Δm s. Using a data sample of 1 fb -1 of pp collisions at √ = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, we find signals of 5600 fully reconstructed hadronic B s decays, 3100 partially reconstructed hadronic B s decays, and 61500 partially reconstructed semileptonic B s decays. We measure the probability as a function of proper decay time that the B s decays with the same, or opposite, flavor as the flavor at production, and we find a signal for B s 0-B̄ s 0 oscillations. The probability that random fluctuations could produce a comparable signal is 8 × 10 -8, which exceeds 5σ significance. We measure Δm s = 17.77 ± 0.10(stat) ± 0.07(syst) ps -1 and extract |V td/V ts| = 0.2060 ± 0.0007(Δm s) -0.0060 +0.0081 (Δm d + theor).
2006
CDF Collaboration, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, et al. (2006). Observation of B0(s)-B-bar0_s Oscillations. PHYSICAL REVIEW LETTERS, 97(24), 1-7 [10.1103/PhysRevLett.97.242003].
CDF Collaboration; A. Abulencia; J. Adelman; T. Affolder; T. Akimoto; M. G. Albrow; D. Ambrose; S. Amerio; D. Amidei; A. Anastassov; K. Anikeev; A. An...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/24971
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