Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Electron Identification And Measurement Of The Inclusive Semileptonic Branching Fraction Of B Mesons At The Babar Experiment
Download Electron Identification And Measurement Of The Inclusive Semileptonic Branching Fraction Of B Mesons At The Babar Experiment full books in PDF, epub, and Kindle. Read online Electron Identification And Measurement Of The Inclusive Semileptonic Branching Fraction Of B Mesons At The Babar Experiment ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Electron Identification and Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons at the BABAR Experiment by :
Download or read book Electron Identification and Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons at the BABAR Experiment written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An algorithm for identification of electrons with the BABAR detector is developed. Based on pure samples of electrons and hadrons obtained from data, we determine the electron identification efficiency to be above 90% for momenta above 0.5 GeV/c in the laboratory frame, while the pion fake rate lies between 0.05% and 0.1%. Based on this algorithm, a measurement of the inclusive lepton momentum spectrum in B meson decays is performed. We analyze 4.13 fb^-1 and 0.97 fb^-1 of data recorded at and slightly below the Upsilon(4S) resonance with the BABAR detector at the PEP-II a symmetric B-Factory. B-Bbar events are tagged by a high momentum electron. Using charge and angular correlations, leptons from a second semileptonic $B$ decay are separated from secondary charm semileptonic decays. The inclusive branching ratio is measured to be (10.85 +-0.22(stat.) +-0.34(sys))% . Combined with the B lifetime we determine |V_cb| = 0.0406 +-0.0009(exp) +-0.0019(theory).
Book Synopsis Electron Identification and Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons at the BABAR Experiment by : Thorsten Brandt
Download or read book Electron Identification and Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons at the BABAR Experiment written by Thorsten Brandt and published by . This book was released on 2002 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons Using Fully Reconstructed B-Mesons as Tags in the BABAR Experiment by :
Download or read book Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons Using Fully Reconstructed B-Mesons as Tags in the BABAR Experiment written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Book Synopsis Measurement of the B-meson Inclusive Semileptonic Branching Fraction and Electron-energy Moments by : Christopher John Stepaniak
Download or read book Measurement of the B-meson Inclusive Semileptonic Branching Fraction and Electron-energy Moments written by Christopher John Stepaniak and published by . This book was released on 2004 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons Using Fully Reconstructed B-mesons as Tags in the BABAR Experiment by : Valery Miftakhov
Download or read book Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons Using Fully Reconstructed B-mesons as Tags in the BABAR Experiment written by Valery Miftakhov and published by . This book was released on 2003 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of the Inclusive Semileptonic Branching Fraction of B Mesons at the Upsilon(4S) Resonance by : Ruoyu Wang
Download or read book Measurements of the Inclusive Semileptonic Branching Fraction of B Mesons at the Upsilon(4S) Resonance written by Ruoyu Wang and published by . This book was released on 1994 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays by :
Download or read book Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded at the[Upsilon](4S) resonance with the BABAR detector. Backgrounds from secondary charm decays are separated from prompt B decays using charge and angular correlations between the electron from one B meson and a high momentum electron tag from the second B meson. The resulting branching fraction is[Beta](B[yields] Xe[nu])= (10.87[+-] 0.18(stat)[+-] 0.30(syst))%. Based on this measurement we determine the CKM matrix elementV[sub cb].
Book Synopsis A Measurement of the Inclusive Semileptonic B Meson Branching Fraction at Babar by : Daniel Edward Azzopardi
Download or read book A Measurement of the Inclusive Semileptonic B Meson Branching Fraction at Babar written by Daniel Edward Azzopardi and published by . This book was released on 2003 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semileptonic B Decays at BaBar written by and published by . This book was released on 2007 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the inclusive semileptonic branching fractions of charged and neutral B mesons using 20.6 fb-1 of data measured at the Upsilon(4S) with the BABAR detector. Events are tagged with a fully reconstructed hadronic decay of a B meson. The correlation between the flavor of the tag B meson and the electron charge allows the separation of prompt semileptonic B decays and cascade semileptonic charm decays. We obtain the preliminary inclusive semileptonic branching fraction of charged B mesons b+ = 0.103+/-0.006+/-0.005, neutral B mesons b0 = 0.104+/-0.008+/-0.005, their average b = 0.104+/-0.005+/-0.004, and their ratio b+/b0 = 0.99+/-0.10+/-0.03.
Book Synopsis Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination of by :
Download or read book Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination of written by and published by . This book was released on 2003 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination Of[verticalV[sub Ub][vertical by :
Download or read book Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination Of[verticalV[sub Ub][vertical written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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].
Book Synopsis Studies of Inclusive Semileptonic B Meson Decays with the BABAR Detector by :
Download or read book Studies of Inclusive Semileptonic B Meson Decays with the BABAR Detector written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a brief report on the measurement of the inclusive branching fraction[Beta]([bar B][yields] X[sub c][ell][sup -][bar[nu]]) and the preliminary measurement of the first moment of the hadron mass M[sub X] in such decays. The implications of these results onV[sub cb] are discussed.
Book Synopsis Inclusive Semileptonic B Decays at BABAR. by :
Download or read book Inclusive Semileptonic B Decays at BABAR. written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the inclusive semileptonic branching fractions of charged and neutral B mesons using 20.6 fb−1 of data measured at the [Upsilon](4S) with the BABAR detector. Events are tagged with a fully reconstructed hadronic decay of a B meson. The correlation between the flavor of the tag B meson and the electron charge allows the separation of prompt semileptonic B decays and cascade semileptonic charm decays. We obtain the preliminary inclusive semileptonic branching fraction of charged B mesons b+ = 0.103 ± 0.006 ± 0.005, neutral B mesons b0 = 0.104 ± 0.008 ± 0.005, their average b = 0.104 ± 0.005 ± 0.004, and their ratio b+/b0 = 0.99 ± 0.10 ± 0.03.
Book Synopsis Gebete, Segnungen u. Ceremonien bei der feierlichen Grundsteinlegung zu dem neuen kathol. Gotteshause d. 21. Aug by :
Download or read book Gebete, Segnungen u. Ceremonien bei der feierlichen Grundsteinlegung zu dem neuen kathol. Gotteshause d. 21. Aug written by and published by . This book was released on 1842 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Fraction of the Semileptonic Decay Anti-B0 ---] D*+ Mu- Anti-Muon-Neutrino in the BaBar Experiments by : Douglas Michael Thiessen
Download or read book Measurement of the Branching Fraction of the Semileptonic Decay Anti-B0 ---] D*+ Mu- Anti-Muon-Neutrino in the BaBar Experiments written by Douglas Michael Thiessen and published by . This book was released on 2005 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a measurement of the branching fraction for the exclusive semileptonic decay {bar B}{sup 0} {yields} D*{sup +}{mu}{sup -}{nu}{sub {mu}}. This decay is essentially the decay of a b quark to a c quark inside the meson with the release of a muon and neutrino, and it provides a very clean signal for measuring various B meson decay properties. the data for this measurement consist of 22.3 million B{bar B} pairs collected by the BABAR detector at the Stanford Linear Accelerator Center in 1999-2000. The branching fraction is measured to be {Beta}({bar B}{sup 0} {yields} D*{sup +}{mu}{sup -}{bar {nu}}{sub {mu}}) = [4.72 {+-} 0.10 (data stat.) {+-} 0.06 (MC stat.) {+-} 0.20 (syst.) {+-} 0.17 (other {Beta})]%.
Book Synopsis Studying B --] S Gamma at BABAR Using a Fully Inclusive Method by :
Download or read book Studying B --] S Gamma at BABAR Using a Fully Inclusive Method written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The b [yields] s[gamma] decay represents a possible electromagnetic ''loop'' penguin decay of the B meson. This FCNC process is of high theoretical interest because various scenarios of new physics are expected to have contributions at the same (one loop) level as the Standard Model. The large sample of B[bar B] meson decays collected by the BaBar experiment makes a precision measurement of this rare decay possible. In conjunction with Standard Model predictions at the 10% level, it brings new physics effects into the realm of detection--or seriously constrains models that could predict them. A fully inclusive technique is presented to study the b [yields] s[gamma] transition as a function of photon energy, using 88.5 [+-] 1.0 x 10[sup 6] B[bar B] meson decays collected by the BaBar experiment in the years 2000 to 2002. The expected statistical and systematic uncertainties have been fully determined which enables first comparisons with theoretical predictions and other experimental results. It also lays the basis for the determination of the inclusive branching fraction [Beta](B [yields] X[sub s][gamma]) and the measurement of the photon energy spectrum.
Book Synopsis A Measurement of the Semileptonic Branching Fraction of the B_s Meson by :
Download or read book A Measurement of the Semileptonic Branching Fraction of the B_s Meson written by and published by . This book was released on 2012 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the inclusive semileptonic branching fraction of the B{sub s} meson using data collected with the BABAR detector in the center-of-mass energy region above the?(4S) resonance. We use the inclusive yield of? mesons and the? yield in association with a high-momentum lepton to perform a simultaneous measurement of the semileptonic branching fraction and the production rate of B{sub s} mesons relative to all B mesons as a function of center-of-mass energy. The inclusive semileptonic branching fraction of the B{sub s} meson is determined to be?(B{sub s} → l?X) = 9.5{sub -2.0}{sup +2.5}(stat){sub -1.9}{sup +1.1}(syst)%, where l indicates the average of e and?
![Download Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination Of[verticalV[sub Ub][vertical PDF Online Free](https://books.google.com/books/content/images/frontcover/hBvtjwEACAAJ?fife=w200-h370)
![Download Measurement of the Branching Fraction of the Semileptonic Decay Anti-B0 ---] D*+ Mu- Anti-Muon-Neutrino in the BaBar Experiments PDF Online Free](https://books.google.com/books/content/images/frontcover/2fqOAQAACAAJ?fife=w200-h370)
![Download Studying B --] S Gamma at BABAR Using a Fully Inclusive Method PDF Online Free](https://books.google.com/books/content/images/frontcover/hq4RDAEACAAJ?fife=w200-h370)
