Search for Rare Semileptonic B-meson Decays PDF Download
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Author: ARGUS Collaboration
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ISBN:
Category :
Languages : en
Pages : 4
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Author: ARGUS Collaboration
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Languages : de
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Author: James David Lyon
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Languages : en
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Author: James Gratrex
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Category :
Languages : en
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![Search for Semileptonic Decays in the B Meson Into the [Lambda]+[subscript C] Baryon PDF](https://books.google.com/books/content/images/frontcover/PGVRAQAAMAAJ?fife=w80-h100)
Author: Tomohiko Tanabe
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Category :
Languages : en
Pages : 248
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Author: ARGUS Collaboration
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Category :
Languages : en
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Author: Curtis William Ward
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Category :
Languages : en
Pages : 374
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Author: Gennadiy Anatolyevich Kukartsev
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ISBN: 9780549168973
Category :
Languages : en
Pages : 212
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This document presents results of the search for B + → etaXK+ in which etaX → etapi+pi - or etaX → K0S K+pi-, and etaX is a potentially exotic state with a resonant mass within (1.2-1.8) GeV. We use the BABAR data of 382.9 million BB pairs and report the first observation of B+ → eta(1295) K+ and B+ → eta(1475)K+, and set upper limits for the modes listed below. We also consider an alternative signal model in the etaX → K0S K+/-pi∓ mode with an extra resonance, to better describe the meson mass spectrum. We provide the central values where possible. Hermitian conjugation is implied throughout the document unless stated otherwise. BB+/- →h1295 K+/- xBh 1295→h pp=2.93+0.77+0.22 -0.73-0.21 ˙10-6, BB+/- →h1475 K+/- xBh 1475→ KK&d1;p =13.79+1.83+1.00-1.65-0.56 ˙10-6. The following upper limits assume 90% C.L: BB+/- →f11285 K+/-xB f11285 →hpp
![Search for rare B-meson decays into D+s [D s] mesons PDF](https://books.google.com/books/content/images/frontcover/35tUGwAACAAJ?fife=w80-h100)
Author: Deutsches Elektronen-Synchrotron (Hamburg).
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Languages : de
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Author: Dana Lindemann
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Category :
Languages : en
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"This thesis presents the searches for two rare B meson decays: the radiative leptonic decay B+ -> l+ nu gamma (l = e, mu) and the flavor-changing neutral current B -> K(*) nu nubar. These searches use the full dataset collected by the BaBar experiment, which corresponds to almost 500 million BB pairs. After fully reconstructing the hadronic decay of one of the B mesons in Upsilon(4S) -> BB decays, evidence of B+ -> l+ nu gamma or B -> K(*) nu nubar is looked for in the rest of the event. No significant evidence of either signal decay is observed. Model-independent branching-fraction upper limits are set at BR(B ->e nu gamma)17 x10 {-6}, BR(B -mu nu gamma)24 x10 {-6}, and BR(B -l nu gamma)15.6 x10 {-6}, all at the 90% confidence level. These are currently the most stringent published upper limits for B+ - l+ nu gamma. In addition, branching-fraction upper limits are set at BR(B -> K+ nu nubar)3.7 x10 {-5}, BR(B - K0 nu nubar)8.0 x10 {-5}, BR(B - K*+ nu nubar)11.5 x10 {-5}, and BR(B - K*0 nu nubar)9.2 x10 {-5}, all at the 90% confidence level. For additional sensitivity to New Physics contributions, partial B - K(*) nu nubar branching-fraction upper limits are also determined over the full kinematic range." --
