Measurement Of Partial Branching Fractions Of Inclusive Charmless B Meson Decays To K K0 And Pi
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Measurement Of Partial Branching Fractions Of Inclusive Charmless B Meson Decays To K K0 And Pi
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Author :
language : en
Publisher:
Release Date : 2011
Measurement Of Partial Branching Fractions Of Inclusive Charmless B Meson Decays To K K0 And Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
The authors present measurements of partial branching fractions of B 2!KX, B 2!K° X, and B 2![pi]+X, where X denotes any accessible final state above the endpoint for B decays to charmed mesons, specifically for momenta of the candidate hadron greater than 2.34 (2.36) GeV for kaons (pions) in the B rest frame. These measurements are sensitive to potential new-phisics particles which could enter the b 2!s(d) loop transitions. The analysis is performed on a data sample consisting of 383 x 106 B{bar B} pairs collected with the BABAR detector at the PEP-II e+e− asymmetric energy collider. The results are in agreement with standard model predictions and exclude large enhancements of the inclusive branching fraction due to sources of new physics.
High Energy Physics Index
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language : en
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Release Date : 1990
High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Nuclear physics categories.
Measurement Of The Partial Branching Fraction For Inclusive Charmless Semileptonic B Decays And Extraction Of
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of The Partial Branching Fraction For Inclusive Charmless Semileptonic B Decays And Extraction 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.
Charmless semileptonic decays, {bar B} 2!X{sub u}l{bar {nu}}, are studied in a sample of 232 million B{bar B} decays recorded with the BABAR detector, in events where the decay of the second B meson is fully reconstructed. Inclusive charmless decays are selected in kinematic regions where the dominant background from semileptonic B decays to charm is reduced by requirements on the hadronic mass M{sub X} and the momentum transfer q2. The partial branching fraction for {bar B} 2!X{sub u}l{bar {nu}} decays for M{sub X} 1.7 GeV/c2 and q2 8 GeV2/c4 is measured to be [Delta][Beta]({bar b} 2!X{sub u}l{bar {nu}}) = (0.87 ± 0.09{sub stat} ± 0.09{sub sys} ± 0.01{sub th}) x 10−3. The CKM matrix element.
Measurements Of Branching Fractions And Cp Violating Asymmetries In B Meson Decays To The Charmless Two Body States K Sup 0 Pi K Bar Sup 0 K Sup And K Sup 0 K Bar Sup 0
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language : en
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Release Date : 2004
Measurements Of Branching Fractions And Cp Violating Asymmetries In B Meson Decays To The Charmless Two Body States K Sup 0 Pi K Bar Sup 0 K Sup And K Sup 0 K Bar Sup 0 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 present preliminary measurements of the branching fraction and the CP-violating charge asymmetry in the B[sup +] --> K[sup 0][pi][sup +] decay, and a preliminary measurement of the branching fraction of the B[sup 0] --> K[sup 0][bar K][sup 0] decay. No evidence of direct CP violation in the B[sup +] --> K[sup 0][pi][sup +] mode is observed. The B[sup 0] --> K[sup 0][bar K][sup 0] measurement constitutes the first observation of this decay channel: the probability of obtaining the result assuming the null-signal hypothesis is 3.4 x 10[sup -6]. The authors have also searched for the B[sup +] --> [bar K][sup 0]K[sup +] decay and set an upper limit on its branching fraction at 2.35 x 10[sup -6] at the 90% C.L. The branching-fraction measurements reported here are consistent with previous measurements of the same quantities, but are extracted from a data sample larger by a factor of 2.6.
Measurement Of The Partial Branching Fraction For Inclusive Semileptonic B Meson Decays To Light Hadrons B Xu L Nu And An Improved Determination Of The Quark Mixing Matrix Element V Ub
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Author : Alexei Volk
language : en
Publisher:
Release Date : 2009
Measurement Of The Partial Branching Fraction For Inclusive Semileptonic B Meson Decays To Light Hadrons B Xu L Nu And An Improved Determination Of The Quark Mixing Matrix Element V Ub written by Alexei Volk and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Measurement Of The Inclusive Charmless Semileptonic Branching Ratio Of B Mesons And Determination Of
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Author :
language : en
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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.
Measurement Of The Inclusive Charmless Semileptonic Branching Ratio Of B Mesons And Determination Of Verticalv Sub Ub Vertical
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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 Partial Branching Fraction For Inclusive Semileptonic B Meson Decays To Light Hadrons B Xulv And An Improved Determination Of The Quark Mixing Matrix Element Vub
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Author : Alexei Volk
language : en
Publisher:
Release Date : 2009
Measurement Of The Partial Branching Fraction For Inclusive Semileptonic B Meson Decays To Light Hadrons B Xulv And An Improved Determination Of The Quark Mixing Matrix Element Vub written by Alexei Volk and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Morelly
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Author :
language : en
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Release Date : 1971
Morelly written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.
Improved Measurements Of The Branching Fractions For B0 Into Pi Pi And B0 Into K Pi And A Search For B0 Into K K
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Author :
language : en
Publisher:
Release Date : 2006
Improved Measurements Of The Branching Fractions For B0 Into Pi Pi And B0 Into K Pi And A Search For B0 Into K K 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.
The authors present measurements of the branching fractions for the charmless two-body decays B° →??− and B° → K+?−, and a search for the decay B° → K+K−. They include the effects of final-state radiation from the daughter mesons for the first time, and quote branching fractions for the inclusive processes B° → h+h'−n?, where h and h' are pion or kaons. The maximum value of the sum of the energies of the n undetected photons, E{sub {gamma}}{sup max}, is mode-dependent. Using a data sample of approximately 227 million?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider at SLAC.