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.
Download or read book Measurement of Branching Ratio and B s0 Lifetime in the Decay B s0 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.
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.
Download or read book Measurement of the Lifetime of the B0s Meson Using the Exclusive Decay Mode B0s J psi Phi written by Farrukh Azfar and published by . This book was released on 1995 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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]-
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/???
Download or read book Measurement of the branching ratios for the decays J psi 3 1 f omega and J psi 3 1 B pi written by J. Burmester and published by . This book was released on 1977 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Decay Amplitudes and Branching Fractions of B J Psi K and B J psi K Decays written by and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data taken with the CLEO II detector, we present the first full angular analysis in the color-suppressed modes B° 2!J/[psi] K*° and B 2!J/[psi] K*. This leads to a complete determination of the decay amplitudes of these modes. In addition, we update the branching fractions for B 2!J/[psi] K and B 2!J/[psi] K*.
Download or read book Measurement of the Branching Ratios for the Decays J psi 3 1 into F omega and J psi 3 1 into Br written by PLUTO Collaboration and published by . This book was released on 1977 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the B d0 Lifetime Using B d0 to J psi K0 S Decays at Dzero written by Paul W. Balm and published by . This book was released on 2004 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a measurement of the B{sub d}{sup 0} lifetime in the decay to (J/{psi}K{sub S}{sup 0}), using 114 pb{sup -1} of data collected by the D0 experiment at the Tevatron from October 15, 2002, to June 10, 2003. The measurement is motivated by the tests of the Standard Model that it makes possible. These include tests of Heavy Quark Effective Theory predicting B-meson lifetimes, and of the complex phase in the CKM-matrix as the source of CP-violation in B{sub d}{sup 0} decays to (J/{psi}K{sub S}{sup 0}).
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:
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:
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.
Download or read book Suppressed B s Decays at CDF written by and published by . This book was released on 2011 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We review three recent results of the CDF collaboration on B{sub s}° suppressed decays: the first search for CP-violation in the B{sub s}° → [phi][phi] decay, where two CP-violating asymmetries expected to be zero in the Standard Model are measured, and the observation and the branching ratio measurements of B{sub s}° → J/[Psi] f0(980) and B{sub s}° → J/[Psi] K{sup (*)} decays.
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 B 0s 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:
Download or read book Measurement of the Ratio of Branching Fractions Br B0s right Arrow D s pi Br B0 right Arrow D pi at CEF 11 written by Ivan Krešimir Furić and published by . This book was released on 2004 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of B0s mixing is one of the flagship analyses for the Run II B physics program. The sensitivity of the measurement to the frequency of B0s oscillations strongly depends on the number of reconstructed B0 mesons. We present the measurement of the ratio of branching fractions Br ..., which directly influences the number of B0s events available for the measurement of B0s mixing at CDF-II. We analyze 115 pb-l of data collected with the CDF-II detector in pp collisions at ... TeV using a novel displaced track trigger ...
