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Measurement Of Branching Ratio And B0s Lifetime In The Decay B0s 2j Psi F0980 At Cdf
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Book Synopsis Measurement of Branching Ratio and B0s Lifetime in the Decay B0s 2!J/[psi] F0(980) at CDF. by :
Download or read book Measurement of Branching Ratio and B0s Lifetime in the Decay B0s 2!J/[psi] F0(980) at CDF. written by and published by . This book was released on 2011 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of Bs0 decays to the CP-odd final state J/[psi] f0(980) with J/[psi] 2!æ+æ- and f0(980) 2![pi]+[pi]-. Using pp̄ collision data with an integrated luminosity of 3.8 fb-1 collected by the CDF II detector at the Tevatron we measure a Bs0 lifetime of [tau](B0s 2!J/[psi] f0(980)) = 1.70-0.11+0.12(stat) " 0.03(syst) ps. This is the first measurement of the Bs0} lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy Bs0 eigenstate. We also measure the product of branching fractions of B0s 2!J/[psi] f0(980) and f0(980) 2![pi]+[pi]- relative to the product of branching fractions of B0s 2!J/[psi][phi] and [phi]2!+K- to be Rf0/[psi] = 0.257 " 0.020(stat) " 0.014(syst), which is the most precise determination of this quantity to date.
Book Synopsis Measurement of Branching Ratio and $B_s0̂$ Lifetime in the Decay $B_s0̂ \rightarrow J/\psi F_0(980)$ at CDF. by :
Download or read book Measurement of Branching Ratio and $B_s0̂$ Lifetime in the Decay $B_s0̂ \rightarrow J/\psi F_0(980)$ at CDF. written by and published by . This book was released on 2011 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of B{sub s}° decays to the CP-odd final state J/? f0(980) with J/? →??− and f0(980) →?+?−. Using p{bar p} collision data with an integrated luminosity of 3.8 fb−1 collected by the CDF II detector at the Tevatron we measure a B{sub s}° lifetime of? (B{sub s}° → J/? f0(980)) = 1.70{sub -0.11}{sup +0.12}(stat) ± 0.03(syst) ps. This is the first measurement of the B{sub s}° lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy B{sub s}° eigenstate. We also measure the product of branching fractions of B{sub s}° → J/? f0(980) and f0(980) →?+?− relative to the product of branching fractions of B{sub s}° → J/?? and? → K+K− to be R{sub f{sub 0}/?} = 0.257 ± 0.020(stat) ± 0.014(syst), which is the most precise determination of this quantity to date.
Book Synopsis Measurement of Lifetime and Decay-Width Difference in B0s -] J/psi Phi Decays by :
Download or read book Measurement of Lifetime and Decay-Width Difference in B0s -] J/psi Phi Decays written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors measure the mean lifetime, [tau] = 2/([Lambda]{sub L} + [Lambda]{sub H}), and the decay-width difference, [Delta][Lambda] = [Lambda]{sub L} - [Lambda]{sub H}, of the light and heavy mass eigenstates of the B{sub s}° meson, B{sub sL}° and B{sub sH}°, in B{sub s}° → J/[psi][phi] decays using 1.7 fb−1 of data collected with the CDF II detector at the Fermilab Tevatron p{bar p} collider. Assuming CP conservation, a good approximation for the B{sub s}° system in the standard model, they obtain [Delta][Lambda] = 0.076{sub -0.063}{sup +0.059}(stat.) ± 0.006(syst.) ps−1 and [tau] = 1.52 ± 0.04(stat.) ± 0.02(syst.) ps, the most precise measurements to date. The constraints on the weak phase and [Delta][Lambda] are consistent with CP conservation.
Book Synopsis Measurement of the Ratio of Branching Ratios B($B^+ \to J/\psi \pi^+$) by :
Download or read book Measurement of the Ratio of Branching Ratios B($B^+ \to J/\psi \pi^+$) written by and published by . This book was released on 1996 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on a measurement of the branching ratio of the Cabibbo-suppressed decay B$+\atop{u}$ 2!J/[Psi][pi]+, where J/[Psi] 2![mu]+[mu]-
Book Synopsis Measurement of the Average B [0 S] Lifetime in the Decay B [0 S] [arrow] J/ [small Psi] [small Phi] by : Thilo Pauly
Download or read book Measurement of the Average B [0 S] Lifetime in the Decay B [0 S] [arrow] J/ [small Psi] [small Phi] written by Thilo Pauly and published by . This book was released on 2003 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Ratio of the Charmless Decay Bs 2![phi][phi] at CDFII. by :
Download or read book Measurement of the Branching Ratio of the Charmless Decay Bs 2![phi][phi] at CDFII. written by and published by . This book was released on 2008 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of the charmless Bs → [phi][phi] decay performed with the CDFII detector at the Fermilab Tevatron Collider. Charmless B0 decays currently can be studied only at the Tevatron and represent a field still to be fully explored that offers additional ways to test our present theoretical understanding. The Bs → [phi][phi] belongs to a particular class of these decays: the Bs meson decays into a pair of vector particle and the fi al state is self- conjugate. It can be used to measure the Bs decay width difference ([Gamma][Delta]s), to improve our understanding about the Cabibbo Kobayashi Maskawa matrix, and to perform tests of decay polarization predictions. The Bs → [phi][phi] decay proceeds through a b → sss transition and in the Standard Model the dominant process is the b → s "penguin" diagram. The same penguin amplitude is involved in several processes which have shown several discrepancies with the Standard Model predictions, raising considerable attention on the theoretical side and new physics interpretations have been considered to explain the experimental data. To shed light on this experimental and theoretical rather complex scenario, new and more precise measurements are clearly needed in as many interesting channels as possible. The study of Bs → [phi][phi] channel is an important player in this experimental effort. The Bs → [phi][phi] decay has been observed for the first time by CDF in 2005 [1] in a data sample of 180 pb-1; eight events have been seen and a first measurement of the Branching Ratio (BR) has been performed. In this thesis we present an update of this measurement with an integrated luminosity of 2.9fb-1. An improvement of a factor 5 compared to the previous Branching Ratio measurement is achieved. In Chap.2 a short introduction on the Standard Model with special emphasis on the electroweak sector is presented. In Chap.3 the Fermilab accelerator complex and the CDFII detector is described. The trigger strategy to select events relevant to B physics is explained in some detail. In Chap.4 we present the data sample used for this analysis and some informations concerning the offline reconstruction program. In Chap.5 the Monte Carlo program and its validation procedure are explained. In Chap.6 the strategy of the Branching Ratio measurement and the optimization procedure used to define the analysis selection criteria both for the Bs → [phi][phi] and the Bs → J/[psi][phi] decays are presented. In Chap.7 all the steps needed to perform the measurement of the BR are reported. Signal yields of the Bs → [phi][phi] and the Bs → J/[psi][phi] decays are presented. The trigger and selection efficiencies and the muon efficiency are evaluated. The ratio of the BR(Bs → [phi][phi]) to the BR(Bs → J/[psi][phi]) is measured and is used to compute the Branching Ratio of Bs → [phi][phi]. The systematic errors on the BR are estimated. In Chap.8 we present the summary of our results.
Book Synopsis Measurement of the Branching Ratios Psi-prime ---] E+ E-, Psi-prime ---] J/psi Pi Pi and Psi-prime ---] J/psi Eta by :
Download or read book Measurement of the Branching Ratios Psi-prime ---] E+ E-, Psi-prime ---] J/psi Pi Pi and Psi-prime ---] J/psi Eta written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have measured several branching ratios for?' decay using the data collected by FNAL E835 experiment during year 2000, obtaining?(?' 2!ee−) = 0.0068 ± 0.0001 ± 0.0004,?(?' 2!J/??+?−) = 0.292 ± 0.005 ± 0.018,?(?' 2!J/??°?°) = 0.167 ± 0.005 ± 0.014 and?(?' 2!J/??) = 0.028 ± 0.002 ± 0.002. They also present a measurement of the dipion mass distribution in the decays?' 2!J/???
Book Synopsis Measurement of the Exclusive and Inclusive Branching Fractions of B0s→D(*)s+Ds(*) Decays at CDF and Its Implications on the Decay Width Difference in the B0s-B̄0s Meson System by : Dominik Horn
Download or read book Measurement of the Exclusive and Inclusive Branching Fractions of B0s→D(*)s+Ds(*) Decays at CDF and Its Implications on the Decay Width Difference in the B0s-B̄0s Meson System written by Dominik Horn and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Branching Ratio in Be7 Decay by : C. M. Turner
Download or read book Branching Ratio in Be7 Decay written by C. M. Turner and published by . This book was released on 1949 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lifetime of the 2[sup 2][sub 1 written by and published by . This book was released on 1992 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the lifetime of 2[sup 2]S[sub [1/2]] level in hydrogenlike [sup 84]Kr and the first determination of the branching ratio for the M decay for this Z=36 one-electron ion. The lifetime of this state was measured by the beam-foil time-of-flight method, in which the foil was moved relative to a fixed, collimated Si(Li) detector. An analysis based on the single photon spectra from a tightly collimated detector led to the measurements of the lifetime of 2[sup 2]S[sub [1/2]], the two-photon emission rate, the M emission rate and the branching ratio of M decay. All these experimental results are in good agreement with the theoretical calculations of Parpia and Johnson, and Goldman and Drake.
Book Synopsis Branching Ratio Measurements of B - J/[psi Eta]K and B± - D0K± with D0 - [pi][pi]−[pi]0 by : Qinglin Zeng
Download or read book Branching Ratio Measurements of B - J/[psi Eta]K and B± - D0K± with D0 - [pi][pi]−[pi]0 written by Qinglin Zeng and published by . This book was released on 2005 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the B0s Lifetime in the Flavor-specific Decay Channel B0s 2!D-s[mu]+[nu]X. by :
Download or read book Measurement of the B0s Lifetime in the Flavor-specific Decay Channel B0s 2!D-s[mu]+[nu]X. written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present an updated measurement of the B0s lifetime using the semileptonic decays B0s → D-s[mu]+[nu]X, with D-s → [pi]- and [Phi] → K+K- (and the charge conjugate process). This measurement uses the full Tevatron Run II sample of proton-antiproton collisions at √s = 1.96 TeV, comprising an integrated luminosity of 10.4 fb-1. We find a flavor-specific lifetime [tau]fs(B0s) = 1.479 ± 0.010(stat) ± 0.021(syst) ps. This technique is also used to determine the B0 lifetime using the analogous B0 → D-[mu]+[nu]X decay with D- → [Phi][pi]- and [Phi] → K+K-, yielding [tau](B0) = 1.534 ± 0.019(stat) ± 0.021(syst) ps. Both measurements are consistent with the current world averages, and the B0s lifetime measurement is one of the most precise to date. As a result, taking advantage of the cancellation of systematic uncertainties, we determine the lifetime ratio [tau]fs(B0s)/[tau](B0) = 0.964 ± 0.013(stat) ± 0.007(syst).
Book Synopsis Measurement of the Branching Ratios for the Decays J/[psi] → [rho][pi] and J/[psi] → [gamma][eta]' by :
Download or read book Measurement of the Branching Ratios for the Decays J/[psi] → [rho][pi] and J/[psi] → [gamma][eta]' written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Ratio for the Decay [eta]-->[mu][mu]− by : Richard S. Kessler
Download or read book Measurement of the Branching Ratio for the Decay [eta]-->[mu][mu]− written by Richard S. Kessler and published by . This book was released on 1992 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the B0s Lifetime Using the Semileptonic Decay Channel B0s 2!D-s[mu]+vX. by :
Download or read book Measurement of the B0s Lifetime Using the Semileptonic Decay Channel B0s 2!D-s[mu]+vX. written by and published by . This book was released on 2009 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the B0s lifetime in the semileptonic decay channel BB0s → D-s[mu]+vX (and its charge conjugate), using approximately 0.4 fb-1 of data collected with the DØ detector during 2002-2004. Using 5176 reconstructed D-s [mu]+ signal events, we have measured the B0s lifetime to be [tau] (B0s) = 1.398 ± 0.044 (stat)+0.028 -0.025 (syst) ps. This is the most precise measurement of the B0s lifetime to date.
Book Synopsis Measurement of the Branching Ratio of the Decay K 0 L --> [my][my] by : T. Inagaki
Download or read book Measurement of the Branching Ratio of the Decay K 0 L --> [my][my] written by T. Inagaki and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CDF Results on B Decays written by and published by . This book was released on 1995 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present recent CDF results on B lifetimes, B meson mass measurements, ratios of branching ratios, and rare decays. In addition, they present the first measurement of time-dependent B{sub d} mixing at CDF. Several results have been updated and a few new ones included since the workshop.
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