An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays

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An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays

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Author : Clare Louise Brown
language : en
Publisher:
Release Date : 2005

An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays written by Clare Louise Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

Crippen Wedi Ei Gondemnio I Farw Am Lofruddio A Darnio Ei Wraig A I Chladdu Yn Seler Ei Dy

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Author :
language : en
Publisher:
Release Date : 18??

Crippen Wedi Ei Gondemnio I Farw Am Lofruddio A Darnio Ei Wraig A I Chladdu Yn Seler Ei Dy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 18?? with Capital punishment categories.

An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays

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Author : Clare Louise Brown
language : en
Publisher:
Release Date : 2005

An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays written by Clare Louise Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays

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Author : Clare Louise Brown
language : en
Publisher:
Release Date : 2005

An Inclusive Measurement Of The Branching Fraction For The B U2192 S Using The Recoil Of Fully Reconstructed B Meson Decays written by Clare Louise Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

An Inclusive Measurement Of The Branching Fraction For The B 602 S 222 Using The Recoil Of Fully Reconstructed B Meson Decays

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Author : Clare Louise Brown
language : en
Publisher:
Release Date : 2005

An Inclusive Measurement Of The Branching Fraction For The B 602 S 222 Using The Recoil Of Fully Reconstructed B Meson Decays written by Clare Louise Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

Measurement Of The B U00af U2192 Xs Branching Fraction With A Sum Of Exclusive Decays

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Author :
language : en
Publisher:
Release Date : 2015

Measurement Of The B U00af U2192 Xs Branching Fraction With A Sum Of Exclusive 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 2015 with categories.

We use 772 × 106 BB-bar meson pairs collected at the ?(4S) resonance with the Belle detector to measure the branching fraction for B-bar → Xs?. Our measurement uses a sum-of-exclusives approach in which 38 of the hadronic final states with strangeness equal to +1, denoted by Xs, are reconstructed. The inclusive branching fraction for MXs 2.8 GeV/c2, which corresponds to a minimum photon energy of 1.9 GeV, is measured to be B(B-bar → Xsubs/sub?)=(3.51±0.17±0.33) × 10sup–4

Measurement Of The Ratio Of Branching Fractions Br B 0 Atop S U2192 D Atop S Br B0 U2192 D At Cdf Ii

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Ratio Of Branching Fractions Br B 0 Atop S U2192 D Atop S Br B0 U2192 D At Cdf Ii written by 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.

The measurement of B$0top{s}$ mixing is one of the flagship analyses for the Run II B physics program. The sensitivity of the measurement to the frequency of B$0top{s}$ oscillations strongly depends on the number of reconstructed B$0top{s}$ mesons. They present the measurement of the ratio of branching fractions Br(B$0top{s}$ → D$-top{s}$?+)/Br(B0 → D-?+), which directly influences the number of B$0top{s}$ events available for the measurement of B$0top{s}$ mixing at CDF-II. They analyze 115 pb-1 of data collected with the CDF-II detector in p$ar{p}$ collisions at √s = 1.96 TeV using a novel displaced track trigger. They reconstruct 78 ± 11 B$0top{s}$ → D$-top{s}$?+ decays at 1153 ± 45 B0 → D-?+ decays with good signal to background ratio. This is the world's largest sample of fully reconstructed B$0top{s}$ → D$-top{s}$?+ decays. They find the ratio of production fractions multiplied by the ratio of branching fractions to be: fs/fd • Br(B$0top{s}$ → D$-top{s}$?+)/Br(B0 → D-?+) = 0.325 ± 0.046(stat) ± 0.034(syst) ± 0.084 (BR). Using the world average value of fs/fd = 0.26 ± 0.03, we infer that the ratio of branching fractions is: Br(B$0top{s}$ → D$-top{s}$?+)/Br(B0 → D-?+) = 1.25 ± 0.18(stat) ± 0.13(syst) ± 0.32(BR) ± 0.14(PR) where the last uncertainty is due to the uncertainty on the world average measurement of the ratio of B$0top{s}$ to B0 production rates, fs/fd.

Measurement Of The Inclusive Semileptonic Branching Fraction Of B Mesons Using Fully Reconstructed B Mesons As Tags In The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Inclusive Semileptonic Branching Fraction Of B Mesons Using Fully Reconstructed B Mesons As Tags In The Babar Experiment written by 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.

The BABAR experiment at SLAC provides an opportunity for measurement of the Standard Model parameters describing CP violation. A method of measuring the CKM matrix element V[sub cb] using Inclusive Semileptonic B decays in events tagged by a fully reconstructed decay of one of the B mesons is presented here. This mode is considered to be one of the most powerful approaches due to its large branching fraction, simplicity of the theoretical description and very clean experimental signatures. Using fully reconstructed B mesons to flag B[bar B] event we were able to produce the spectrum and branching fraction for electron momenta P[sub C.M.S.]> 0.5 GeV/c. Extrapolation to the lower momenta has been carried out with Heavy Quark Effective Theory. The branching fractions are measured separately for charged and neutral B mesons. For 82 fb[sup -1] of data collected at BABAR we obtain: BR(B[sup [+-]] [yields] X e[bar [nu]]) = 10.63 [+-] 0.24 [+-] 0.29%, BR(B[sup 0] [yields] X e[bar [nu]]) = 10.68 [+-] 0.34 [+-] 0.31%, averaged BR(B [yields] X e[bar [nu]]) = 10.65 [+-] 0.19 [+-] 0.27%, ratio of Branching fractions BR(B[sup [+-]])/BR(B[sup 0]) = 0.996 [+-] 0.039 [+-] 0.015 (errors are statistical and systematic, respectively). They also obtain V[sub cb] = 0.0409 [+-] 0.00074 [+-] 0.0010 [+-] 0.000858 (errors are: statistical, systematic and theoretical).

Measurement Of The Inclusive Charmless Semileptonic Branching Ratio Of B Mesons And Determination Of Verticalv Sub Ub Vertical

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Author :
language : en
Publisher:
Release Date : 2003

Measurement Of The Inclusive Charmless Semileptonic Branching Ratio Of B Mesons And Determination Of Verticalv Sub Ub Vertical 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.

We report a measurement of the inclusive charmless semileptonic branching fraction of B mesons in a sample of 89 million B[bar B] events recorded with the BABAR detector at the[Upsilon](4S) resonance. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson. The number of signal events is extracted from the hadronic mass distribution and is used to determine the ratio of branching fractions[Beta]([bar B][yields] X[sub u]l[bar[nu]])/[Beta]([bar B][yields] Xl[bar[nu]])= (2.06[+-] 0.25(stat)[+-] 0.23(syst)[+-] 0.36(theo)) x 10[sup -2]. Using the measured branching fraction for inclusive semileptonic B decays, we find[Beta]([bar B][yields] X[sub u]l[bar[nu]])= (2.24[+-] 0.27(stat)[+-] 0.26(syst)[+-] 0.39(theo)) x 10[sup -3] and derive the CKM matrix elementV[sub ub]= (4.62[+-] 0.28(stat)[+-] 0.27(syst)[+-] 0.48(theo)) x 10[sup -3].

Measurement Of The Inclusive Charmless Semileptonic Branching Ratio Of B Mesons And Determination Of

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Author :
language : en
Publisher:
Release Date : 2003

Measurement Of The Inclusive Charmless Semileptonic Branching Ratio Of B Mesons 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 2003 with categories.

We report a measurement of the inclusive charmless semileptonic branching fraction of B mesons in a sample of 89 million B{bar B} events recorded with the BABAR detector at the [Upsilon](4S) resonance. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson. The number of signal events is extracted from the hadronic mass distribution and is used to determine the ratio of branching fractions [Beta]({bar B} → X{sub u}l{bar {nu}})/[Beta]({bar B} → Xl{bar {nu}}) = (2.06 ± 0.25(stat) ± 0.23(syst) ± 0.36(theo)) x 10−2. Using the measured branching fraction for inclusive semileptonic B decays, we find [Beta]({bar B} → X{sub u}l{bar {nu}}) = (2.24 ± 0.27(stat) ± 0.26(syst) ± 0.39(theo)) x 10−3 and derive the CKM matrix element.