Measurement Of The Relative Branching Fractions For B To D D D D Pi Ell Bar Nu Ell With A Large Sample Of Tagged B Mesons

DOWNLOAD

Download Measurement Of The Relative Branching Fractions For B To D D D D Pi Ell Bar Nu Ell With A Large Sample Of Tagged B Mesons PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Measurement Of The Relative Branching Fractions For B To D D D D Pi Ell Bar Nu Ell With A Large Sample Of Tagged B Mesons book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Measurement Of The Relative Branching Fractions For B To D D D D Pi Ell Bar Nu Ell With A Large Sample Of Tagged B Mesons

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

Measurement Of The Relative Branching Fractions For B To D D D D Pi Ell Bar Nu Ell With A Large Sample Of Tagged B Mesons 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 present a study of B semileptonic decays into charm final states based on 211.7 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring. Using a novel technique based on the simultaneous fit of a set of variables reconstructed on the recoil of a B tagged in an hadronic decay mode, we measure the relative branching fractions {Lambda}(B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}}) = 0.611 {+-} 0.022 (stat.) {+-} 0.027 (syst.) and {Lambda}(B{sup -} {yields} D**{sup 0})(D{sup (*)}{pi}){ell}{sup -}{bar {nu}}{sub {ell}}/{Lambda}(B{sup -} {yields} DX{ell}{sup -}{bar {nu}}{sub {ell}}) = 0.173 {+-} 0.017 (stat.) {+-} 0.021 (syst.).

Measurement Of The Relative Branching Fractions Of Bbar To D D D L Nubar L Decays In Events With A Fully Reconstructed B Meson

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The Relative Branching Fractions Of Bbar To D D D L Nubar L Decays In Events With A Fully Reconstructed B Meson 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.

We determine the relative branching fractions of semileptonic B decays to charmed final states. The measurement is performed on the recoil from a fully reconstructed B meson in a sample of 362 million B{bar B} pairs collected at the [Upsilon](4S) resonance with the BABAR detector. A simultaneous fit to a set of discriminating variables is performed on a sample of {bar B} → DXl−{bar {nu}}{sub {ell}} decays to determine the contributions from the different channels.

Branching Fraction For B Pi0 L Nu Measured In Upsilon 4s Bbbar Events Tagged By B D0 L Nubar X Decays

DOWNLOAD
Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

Branching Fraction For B Pi0 L Nu Measured In Upsilon 4s Bbbar Events Tagged By B D0 L Nubar X Decays 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 2005 with categories.

We report a preliminary branching fraction of (1.80 {+-} 0.37{sub stat.} {+-} 0.23{sub syst.}) x 10{sup -4} for the charmless exclusive semileptonic B{sup +} {yields} {pi}{sup 0}{ell}{sup +}{nu} decay, where {ell} can be either a muon or an electron. This result is based on data corresponding to an integrated luminosity of 81 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector. The analysis uses B{bar B} events that are tagged by a B meson reconstructed in the semileptonic B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}(X) decays, where X can be either a {gamma} or a {pi}{sup 0} from a D* decay.

Measurement Of The Branching Fractions Of Bbar D L Nubar L Decays In Events Tagged By A Fully Reconstructed B Meson

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008

Measurement Of The Branching Fractions Of Bbar D L Nubar L Decays In Events Tagged By A Fully Reconstructed B Meson written by 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.

We report a measurement of the branching fractions of {bar B} 2!D** l−{bar {nu}}{sub l} decays based on 417 fb−1 of data collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D{sup (*)})-m(D{sup (*)}) is performed to extract the signal yields of the different D** states. We observe the {bar B} 2!D**{ell}−{bar {nu}}{sub {ell}} decay modes corresponding to the four D** states predicted by Heavy Quark Symmetry with a significance greater than six standard deviations including systematic uncertainties.

Measurements Of B To Pi Eta Eta L Nu Branching Fractions Anddetermination Of

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008

Measurements Of B To Pi Eta Eta L Nu Branching Fractions Anddetermination 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 2008 with categories.

La P Tite Du Sixi Me

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1917

La P Tite Du Sixi Me written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1917 with categories.

Measurement Of The Absolute Branching Fraction Of D 0 To K Pi

DOWNLOAD
Author : Romulus Godang
language : en
Publisher:
Release Date : 2006

Measurement Of The Absolute Branching Fraction Of D 0 To K Pi written by Romulus Godang 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.

The authors measure the absolute branching fraction for D{sup 0} {yields} K{sup -} {pi}{sup +} using partial reconstruction of {bar B}{sup 0} {yields} D*{sup +} X {ell}{sup -} {bar {nu}}{sub {ell}} decays. Only the charged lepton and the soft pion from the decay D*{sup +} {yields} D{sup 0} {pi}{sup +} are used. Based on a data sample of 230 million B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they obtain {Beta}(D{sup 0} {yields} K{sup -} {pi}{sup +}) = (4.025 {+-} 0.038 {+-} 0.098)%, where the first error is statistical and the second error is systematic.

Measurement Of The B To Pi L Nu Branching Fraction And Determination Of

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The B To Pi L Nu 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 a measurement of the B →?l? branching fraction based on 211 fb−1 of data collected with the BABAR detector. We use samples of B° and B mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay, and combine the results assuming isospin symmetry to obtain?(B° →?−l+?) = (1.33 ± 0.17{sub stat} ± 0.11{sub syst}) x 10−4. We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element.

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

DOWNLOAD
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 Branching Fraction Of Ee B Bar B At The Upsilon 4s Resonance

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Branching Fraction Of Ee B Bar B At The Upsilon 4s Resonance 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 a measurement of the branching fraction ee− --> B°{bar B}° with a data sample of 81.7 fb−1 collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II asymmetric-energy ee− storage ring. Using partial reconstruction of the decay {bar B}° --> D*+l−{bar {nu}}{sub {ell}} they obtain a preliminary result of f00 = 0.486 ± 0.010(stat.) ± 0.009(sys.). The result does not depend on branching fractions of the {bar B}° and the D*+ decay chains, on the simulated reconstruction efficiency, on the ratio of the charged and neutral B meson lifetimes, nor on assumption of isospin symmetry. This measurement is important for normalizing many B decay branching fractions, and contributes to an understanding of isospin violation in the [Upsilon](4S) system.