Study of Inclusive And Exclusive B ---] X/U L Nu Decays And the Measurement of PDF Download
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![Study of Inclusive And Exclusive B ---] X/U L Nu Decays And the Measurement of PDF](https://books.google.com/books/content/images/frontcover/3ttCAQAACAAJ?fife=w150-h200)
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Languages : en
Pages : 5
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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.
![Study of Inclusive And Exclusive B ---] X/U L Nu Decays And the Measurement of PDF](https://books.google.com/books/content/images/frontcover/3ttCAQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 5
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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.
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Languages : en
Pages : 7
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Author:
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Languages : en
Pages :
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A preliminary result on the study of the inclusive electron spectrum in B[yields] X[sub u]e[nu] decays above the kinematic limit for the dominant B[yields] X[sub c]e[nu] transitions is presented. This study is performed at the PEP-II asymmetric B Factory, where B meson pairs are produced in the decay of the[Upsilon](4S) resonance. For the electron momentum range of 2.3-2.6 GeV/c in the[Upsilon](4S) rest frame, the partial branching ratio is measured to be[Delta][Beta](B[yields] X[sub u]e[nu])= (0.152[+-] 0.014[+-] 0.014)[center-dot] 10[sup -3].
![Preliminary Measurement of the Inclusive Electron Spectrum in Charmless Semileptonic B Decays Near the Kinematic Endpoint and Determination of [verticalV[sub Ub][vertical PDF](https://books.google.com/books/content/images/frontcover/BhkJkAEACAAJ?fife=w80-h100)
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Languages : en
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The authors study the inclusive electron spectrum of B --> X[sub u]e[nu] decays near the kinematic limit for B --> X[sub c]e[nu] transitions using a sample of 88 million [Upsilon](4S) decays recorded by the BABAR detector at the PEP II e[sup +]e[sup -] storage rings. For the electron momentum interval of 2.0-2.6GeV/c the partial branching fraction is measured to be [Delta]B(B --> X[sub u]e[nu]) = (0.480 [+-] 0.029(stat) [+-] 0.053(syst) x 10[sup -3]). Combining this result on [Delta]B with measurements of the inclusive photon spectrum in B --> X[sub s][gamma] transition the authors find V[sub ub] = 3.94 [+-] 0.25exp [+-] 0.37 f[sub u] [+-] 0.19 theory x 10[sup -3], where the first error represents the combined statistical and systematic experimental uncertainty of the partial branching fraction measurement, the second refers to the uncertainty of the determination of the fraction f[sub u] of the inclusive electron spectrum that falls within the cuts, and the third error is due to theoretical uncertainties in the QCD corrections, plus the uncertainty in the b-quark mass. All results are preliminary.
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Category :
Languages : en
Pages : 5
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Book Description
The authors study the inclusive electron spectrum of B --> X{sub u}e[nu] decays near the kinematic limit for B --> X{sub c}e[nu] transitions using a sample of 88 million [Upsilon](4S) decays recorded by the BABAR detector at the PEP II ee− storage rings. For the electron momentum interval of 2.0-2.6GeV/c the partial branching fraction is measured to be [Delta]B(B --> X{sub u}e[nu]) = (0.480 ± 0.029(stat) ± 0.053(syst) x 10−3). Combining this result on [Delta]B with measurements of the inclusive photon spectrum in B --> X{sub s}[gamma] transition the authors find.
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Category : Translations
Languages : en
Pages : 1780
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Author: James Hastings
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Category : Bible
Languages : en
Pages : 894
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Author: Lonely Planet
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ISBN: 9781838694302
Category : Travel
Languages : en
Pages : 324
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Book Description
Avoid the crowds and discover 75 amazing places away from the tourist trail. Featuring practical planning information combined with vibrant photography and handy maps, Lonely Planet's Offbeat is a beautiful hardcover book that will inspire you to take the road less travelled and discover incredible experiences in under-the-radar destinations.
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Languages : en
Pages : 84
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Book Description
Macabre is a horror/fantasy short-stories novel written to entertain our senses and curiosity of the supernatural, paranormal, and mystical. You might have nightmares after reading Macabre or you might laugh. Either way, be prepared to be scared.
