Study Of Inclusive B And Bar B 0 Decays Toflavor Tagged D D S And Lambda C

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Study Of Inclusive B And Bar B 0 Decays Toflavor Tagged D D S And Lambda C

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Study Of Inclusive B And Bar B 0 Decays Toflavor Tagged D D S And Lambda C written by B. Aubert 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 on a study of inclusive B{sup -} and {bar B}{sup 0} meson decays to D{sup 0}X, {bar D}{sup 0}X, D{sup +}X, D{sup -}X, D{sub s}{sup +}X, D{sub s}{sup -}X, {Lambda}{sub c}{sup +}X, {bar {Lambda}}{sub c}{sup -}X, based on a sample of 231 million B{bar B} events recorded with the BABAR detector at the {Upsilon}(4S) resonance. Events are selected by completely reconstructing one B and searching for a reconstructed charm particle in the rest of the event. From the measured branching fractions of these decays, we infer the number of charm and anti-charm particles per {bar B} decay, separately for charged and neutral parents. We derive the total charm yield per B{sup -} decay, n{sub c}{sup -} = 1.202 {+-} 0.023 {+-} 0.040{sub -0.029}{sup +0.035}, and per {bar B}{sup 0} decay, n = 1.193 {+-} 0.030 {+-} 0.034{sub -0.035}{sup +0.044} where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties. We also present the charm momentum distributions measured in the {bar B} rest frame.

Measurement Of The Branching Fractions For Inclusive B Sup And Bar B Sup 0 Decays To Flavor Tagged D D Sub S And Lambda Sub C

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Branching Fractions For Inclusive B Sup And Bar B Sup 0 Decays To Flavor Tagged D D Sub S And Lambda Sub C 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 authors report on the inclusive branching fractions of B[sup -] and of [bar B][sup 0] mesons decaying to D[sup 0]X, [bar D][sup 0]X, D[sup +]X, D[sup -]X, D[sub s][sup +]X, D[sub s][sup -]X, [Lambda][sub c][sup +]X, [bar [Lambda]][sub c][sup -]X, based on a sample of 88.9 million B[bar B] events recorded with the BABAR detector at the [Upsilon](4S) resonance. Events are selected by completely reconstructing one B and searching for a reconstructed charmed particle in the rest of the event. The authors measure the number of charmed and of anit-charmed particles per B decay and derive the total charm yield per B[sup -] decay, n[sub c][sup -] = 1.313 [+-] 0.037 [+-] 0.037 [+-] 0.062[sub -0.043][sup +0.063], and per [bar B][sup 0] decay, n[sub c][sup 0] = 1.276 [+-] 0.062 [+-] 0.058[sub -0.046][sup +0.066] where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties.

Measurement Of The Branching Fractions For Inclusive B And Bar B Decays To Flavor Tagged D D Sub S And Lambda Sub C

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Branching Fractions For Inclusive B And Bar B Decays To Flavor Tagged D D Sub S And Lambda Sub C 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 authors report on the inclusive branching fractions of B− and of {bar B}° mesons decaying to D°X, {bar D}°X, DX, D−X, D{sub s}+X, D{sub s}−X,?{sub c}+X, {bar {Lambda}}{sub c}−X, based on a sample of 88.9 million B{bar B} events recorded with the BABAR detector at the?(4S) resonance. Events are selected by completely reconstructing one B and searching for a reconstructed charmed particle in the rest of the event. The authors measure the number of charmed and of anit-charmed particles per B decay and derive the total charm yield per B− decay, n{sub c}− = 1.313 ± 0.037 ± 0.037 ± 0.062{sub -0.043}{sup +0.063}, and per {bar B}° decay, n{sub c}° = 1.276 ± 0.062 ± 0.058{sub -0.046}{sup +0.066} where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties.

Study Of Bbar To Xu L Nubar Decays In Bbbar Events Tagged By A Fully Reconstructed B Meson Decay And Determination Of

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Author :
language : en
Publisher:
Release Date : 2012

Study Of Bbar To Xu L Nubar Decays In Bbbar Events Tagged By A Fully Reconstructed B Meson Decay 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 2012 with categories.

We report measurements of partial branching fractions for inclusive charmless semileptonic B decays {bar B} → X{sub u}l{bar {nu}}, and the determination of the CKM matrix element.

Recueil Factice D Articles De Presse Concernant Henriette Berthias

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Author :
language : en
Publisher:
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Recueil Factice D Articles De Presse Concernant Henriette Berthias written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

Document Concernant Raymond Massey Vedette De Cin Ma

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language : en
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Document Concernant Raymond Massey Vedette De Cin Ma written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

Heavy Flavor Decays Of The Z0 And A Search For Flavor Changing Neutral Currents

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Author :
language : en
Publisher:
Release Date : 2004

Heavy Flavor Decays Of The Z0 And A Search For Flavor Changing Neutral Currents 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.

Presented here are the results of a direct search for flavor changing neutral currents via the rare process Z[sup 0] [yields] bs and a measurement of R[sub bs] = [Lambda](Z[sup 0] [yields] bs)/[Lambda](Z[sup 0] [yields] hadrons). Because the decays Z[sup 0] [yields] b[bar b] and Z[sup 0] [yields] c[bar c] contribute significant backgrounds to Z[sup 0] [yields] bs, simultaneous measurements of R[sub b] = [Lambda](Z[sup 0] [yields] b[bar b])/[Lambda](Z[sup 0] [yields] hadrons) and R[sub c] = [Lambda](Z[sup 0] [yields] c[bar c])/[Lambda](Z[sup 0] [yields] hadrons) were also made. The standard double tag technique was extended and self calibrating tags were used for s, c, and b quarks. These measurements were made possible by the unique capabilities of the SLAC Large Detector (SLD) at the Stanford Linear Accelerator Center (SLAC): The b and c tags relied upon the SLD's VXD3 307 megapixel CCD vertex detector for topological and kinematic reconstruction of the B and D decay vertices; the s tag identified K[sup [+-]] mesons using the particle identification capabilities of SLD's Cherenkov Ring Imaging Detector (CRID), and K[sub S][sup 0] mesons and [Lambda] hadrons by kinematic reconstruction of their decay vertices in SLD's 5120 channel central drift chamber (CDC) particle tracking system.

Inclusive Semileptonic B Decays At Babar

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Author :
language : en
Publisher:
Release Date : 2004

Inclusive Semileptonic B Decays 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 2004 with categories.

The authors report updates on two analyses of inclusive semileptonic B decays based on a dataset 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 [bar B] meson. IN the first analysis, the measurement of the first and second moment of the hadronic mass distribution in Cabibbo-favored [bar B] [yields] X[sub c][ell][bar [nu]] decays allows for the determination of the nonperturbative parameters [bar [Lambda]] and [lambda][sub 1] of Heavy Quark Effective Theory (HQET) and V[sub cb]. In the second analysis, the hadronic mass distribution is used to measure the inclusive charmless semileptonic branching fraction and to determine V[sub ub].

Study Of Inclusive And Exclusive B X U L Nu Decays And The Measurement Of

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Author :
language : en
Publisher:
Release Date : 2005

Study Of Inclusive And Exclusive B X U L Nu Decays And The Measurement 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 2005 with categories.

We report studies of B → X{sub u}l[nu] decays, based on a sample of 88 million B{bar B} events recorded with the BABAR detector. From both tagged and untagged B{bar B} events we have isolated inclusive charmless decays in kinematic regions for which the dominant background from B → X{sub c}l[nu] is reduced by making requirements on different variables: the electron energy E{sub l}, the momentum transfer q2, and the hadronic mass m{sub X}. Using theoretical calculations we extrapolate to the total decay rate to determine the CKM matrix element.

Measurements Of Lambda C Branching Fractions Of Cabibbo Suppressed Decay Modes Involving Lambda And Sigma 0

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2006

Measurements Of Lambda C Branching Fractions Of Cabibbo Suppressed Decay Modes Involving Lambda And Sigma 0 written by J. C. Chen 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.