Measurement of the B0(s) - Anti-B0(s) Oscillation Frequency PDF Download
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Languages : en
Pages : 7
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The authors present the first measurement of the B{sub s}°-{bar B}{sub s}° oscillation frequency [Delta]m{sub s}. They use 1 fb−1 of data from p{bar p} collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The sample contains signals of 3600 fully reconstructed hadronic B{sub s} decays and 37,000 partially reconstructed semileptonic B{sub s} decays. They measure the probability as a function of proper decay time that the B{sub s} decays with the same, or opposite, flavor as the flavor at production and they find a signal consistent with B{sub s}°-{bar B}{sub s}° oscillations. The probability that random fluctuations could produce a comparable signal is 0.2%. Under the hypothesis that the signal is due to B{sub s}°-{bar B}{sub s}° oscillations, they measure [Delta]m{sub s} = 17.31{sub -0.18}{sup +0.33}(stat.) ± 0.07(syst.) ps−1 and determine.
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Languages : en
Pages : 7
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Book Description
The authors present the first measurement of the B{sub s}°-{bar B}{sub s}° oscillation frequency [Delta]m{sub s}. They use 1 fb−1 of data from p{bar p} collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The sample contains signals of 3600 fully reconstructed hadronic B{sub s} decays and 37,000 partially reconstructed semileptonic B{sub s} decays. They measure the probability as a function of proper decay time that the B{sub s} decays with the same, or opposite, flavor as the flavor at production and they find a signal consistent with B{sub s}°-{bar B}{sub s}° oscillations. The probability that random fluctuations could produce a comparable signal is 0.2%. Under the hypothesis that the signal is due to B{sub s}°-{bar B}{sub s}° oscillations, they measure [Delta]m{sub s} = 17.31{sub -0.18}{sup +0.33}(stat.) ± 0.07(syst.) ps−1 and determine.
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Languages : en
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The B[sup 0]-[bar B][sup 0] oscillation frequency has been measured with a sample of 23 million B[bar B] pairs collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we select events in which both B mesons decay semileptonically and use the charge of the leptons to identify the flavor of each B meson. A simultaneous fit to the decay time difference distributions for opposite- and same-sign dilepton events gives[Delta]m[sub d]= 0.493[+-] 0.012 (stat)[+-] 0.009 (syst) ps[sup -1].
Author: Vivek Tiwari
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Category :
Languages : en
Pages : 0
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Author: Juan Carlos Pinto
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Category :
Languages : en
Pages : 0
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Category :
Languages : en
Pages : 265
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This thesis reports a time dependent measurement of the B°{sub s}-{bar B}°{sub s} oscillation frequency [Delta]m{sub s} using semileptonic decays B°{sub s} → D−{sub s}l+X. We use a data sample of 1 fb−1 of p{bar p} collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron Collider to reconstruct ≈ 61, 500 semileptonic B°{sub s} decays. This analysis of B°{sub s}-{bar B}°{sub s} mixing has a sensitivity of 19.4 ps−1 and shows an evidence of B°{sub s} oscillations at [Delta]m{sub s} ≈17.75 ps−1 with an amplitude significance of ≈2. In combination with the analyses of ≈ 8,700 hadronic B°{sub s} decays at CDF, we have made the first direct observation of time-dependent B°{sub s}-{bar B}°{sub s} flavor oscillations measuring [Delta]m{sub s} = 17.77 {sup +0.09}{sub -0.10} (stat) ± 0.07 (syst) ps−1. The obtained value of [Delta]m{sub s} agrees with the Standard Model expectation. When combined with the world average values for [Delta]m{sub d}, m{sub {bar B}0} and m{sub {bar B}0s}, along with other theoretical input, this result yields the ratio of CKM matrix elements.
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Category :
Languages : en
Pages : 9
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The authors report the observation of B{sub s}°-{bar B}{sub s}° oscillations from a time-dependent measurement of the B{sub s}°-{bar B}{sub s}° oscillation frequency [Delta]m{sub s}. Using a data sample of 1 fb−1 of p{bar p} collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, they find signals of 5600 fully reconstructed hadronic B{sub s} decays, 3100 partially reconstructed hadronic B{sub s} decays, and 61,500 partially reconstructed semileptonic B{sub s} decays. They measure the probability as a function of proper decay time that the B{sub s} decays with the same, or opposite, flavor as the flavor at production, and they find a signal for B{sub s}°-{bar B}{sub s}° oscillations. The probability that random fluctuations could produce a comparable signal is 8 x 10−8, which exceeds 5[sigma] significance. They measure [Delta]m{sub s} = 17.77 ± 0.10(stat) ± 0.07(syst) ps−1 and extract.
Author: Christopher Mark Le Clerc
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Category :
Languages : en
Pages : 578
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Author: Ming Chao
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Category : B mesons
Languages : en
Pages : 330
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![Measurement of Time-dependent B[sup 0]-[anti B][sup 0] Flavor Oscillation at CDF. PDF](https://books.google.com/books/content/images/frontcover/BgAxkAEACAAJ?fife=w80-h100)
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Category :
Languages : en
Pages :
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The time dependence of B[sup 0]-[anti B][sup 0] oscillations has been studied using several techniques by the CDF experiment at Fermilab. The data comprise 110 pb[sup[minus]1] of p[anti p] collisions at[radical]s= 1.8 TeV. Preliminary measurements of the B[sup 0]-[anti B][sup 0] oscillation frequency ([Delta]m[sub d]) will be presented.
Author: Claudia Lecci
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Category :
Languages : en
Pages : 163
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