Measurement Of Branching Fractions And Form Factor Parameters Of B Dlnu And B D Lnu Decays At Babar

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Measurement Of Branching Fractions And Form Factor Parameters Of B Dlnu And B D Lnu Decays At Babar

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Author : Kenji Hamano
language : en
Publisher:
Release Date : 2008

Measurement Of Branching Fractions And Form Factor Parameters Of B Dlnu And B D Lnu Decays At Babar written by Kenji Hamano and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

Review Of Exculsive B To D Lnu Decays

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Author :
language : en
Publisher:
Release Date : 2007

Review Of Exculsive B To D Lnu Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

This paper reviews semileptonic decays of B-mesons to states containing charm mesons, i.e., D, D*, D** and possible non-resonant D{sup (*)}[eta][pi] states as well. The paper covers measurement of branching fractions, form-factors and, most importantly, the magnitude of the CKM matrix element V{sub cb}. I will not attempt a comprehensive review, but will concentrate on reasonably fresh results and consider mostly exclusive measurements. I will also comment on the consistency of the results and what needs to be done to resolve the apparent conflicts.

Measurement Of B D Form Factors In The Semileptonic Decay B0 D Lv At Babar

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Author : Mandeep Singh Gill
language : en
Publisher:
Release Date : 2004

Measurement Of B D Form Factors In The Semileptonic Decay B0 D Lv At Babar written by Mandeep Singh Gill and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Measurement Of B D Form Factors In The Semileptonic Decay B D L Nu At Babar

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of B D Form Factors In The Semileptonic Decay B D L Nu At Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

We present here the results of a measurement of the three semileptonic form factors involved in the decay B° → D*l?, where l is one of the two light charged leptons (i.e. an electron or muon--though the final results in this work are determined only for l = electron). This measurement uses the Babar 2000-2002 data set, which is altogether approximately 85 x 106 B{bar B}-pairs in 78 fb−1 of integrated luminosity. The D* was reconstructed in the channel D*+ → D°?+, and the D° in the channel D° → K−?+. This analysis was based ultimately on ≈ 16,386 reconstructed events with an estimated background contamination of ≈ 15%. The method of the measurement was to perform a unbinned maximum likelihood fit in the four kinematic variables that describe the decay for the three form factor parameters R1, R2, and?2. The results obtained for the form factor ratios are R1 = 1.328 ± 0.055 ± 0.025 ± 0.025 and R2 = 0.920 ± 0.044 ± 0.020 ± 0.013 for the ratios and?2 = 0.769 ± 0.039 ± 0.019 ± 0.032 for the form factor slope. The errors given are statistical, Monte Carlo statistical and systematic respectively.

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

We report the results of a study of the exclusive charmless semileptonic decay, B° →?−l?, undertaken with approximately 227 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with an innovative loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the momentum transfer squared, from which we extract the f+(q2) form-factor shape and the total branching fraction?(B° →?−l+?) = (1.46 ± 0.07{sub stat} ± 0.08{sub syst}) x 10−4. Based on a recent unquenched lattice QCD calculation of the form factor in the range q2> 16 GeV2, we find the magnitude of the CKM matrix element.

Measurements Of The Branching Fractions And Form Factor Of Semileptonic Decays Of B Mesons To D Mesons

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Author : Ye Liu
language : en
Publisher:
Release Date : 1999

Measurements Of The Branching Fractions And Form Factor Of Semileptonic Decays Of B Mesons To D Mesons written by Ye Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

Measurement Of The Branching Fraction For The Decay B D Sup D Sup

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Author :
language : en
Publisher:
Release Date : 2001

Measurement Of The Branching Fraction For The Decay B D Sup D Sup written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

Decays of the type B 2!D{sup (*)} {bar D}(*) can be used to provide a measurement of the parameter sin2[beta] of the Unitarity Triangle that is complementary to the measurement derived from the mode B° 2!K{sub S}°. In this document we report a measurement of the branching fraction for the decay B° 2!D*D*− with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb−1 collected at the [Upsilon](4S) resonance during 1999-2000, we have reconstructed 38 candidate signal events in the mode B° 2!D*D*− with an estimated background of 6.2 ± 0.5 events. From these events, we determine the branching fraction to be [Beta](B° 2!D*+D*−) = (8.0 ± 1.6(stat) ± 1.2(syst)) x 10−4 (preliminary). The measured fraction of the component with odd CP parity is 0.27± 0.17(stat) ± 0.02(syst).

Measurement Of The B0 And B Branching Fractions The B0 And B Form Factor Shapes And Determination Of

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Author :
language : en
Publisher:
Release Date : 2011

Measurement Of The B0 And B Branching Fractions The B0 And B Form Factor Shapes And Determination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

We report the results of a study of the exclusive charmless semileptonic decays, B →?{sup {prime}}l+? and B° →?−l+?, undertaken with approximately 464 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B+ →?l+? and B° →?−l+? decays in three and 12 bins of q2, respectively, from which we extract the f+(q2) form-factor shapes and the total branching fractions?(B+ →?l+?) = (0.36 ± 0.05{sub stat} ± 0.04{sub syst}) x 10−4 and?(B° →?−l+?) = (1.42 ± 0.05{sub stat} ± 0.07{sub syst}) x 10−4. We also measure?(B+ →?{sup {prime}}l+?) = (0.24 ± 0.08{sub stat} ± 0.03{sub syst}) x 10−4. We obtain values for the magnitude of the CKM matrix element.

Measurement Of The Branching Ratio And Form Factor Parameters Of The Decay Kl M M G

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Author : A. J. Bevan
language : en
Publisher:
Release Date : 2001

Measurement Of The Branching Ratio And Form Factor Parameters Of The Decay Kl M M G written by A. J. Bevan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

Measurement Of The Branching Fraction And Polarization For The Decay B 2 D K

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Author :
language : en
Publisher:
Release Date : 2003

Measurement Of The Branching Fraction And Polarization For The Decay B 2 D K written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

The authors present a study of the decay B− → D*° K*− based on a sample of 86 million [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factor at SLAC. The authors measure the branching fraction [Beta](B− → D*° K*−) = (8.3 ± 1.1(stat) ± 1.0(syst)) x 10−4, and the fraction of longitudinal polarization in this decay to be [Lambda]{sub L}/[Lambda] = 0.86 ± 0.06(stat) ± 0.03(syst).