Search for rare B-meson decays into D+s [D s] mesons
Author: Deutsches Elektronen-Synchrotron (Hamburg).
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Published: 1993
Total Pages:
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Author: Deutsches Elektronen-Synchrotron (Hamburg).
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Published: 1993
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DOWNLOAD EBOOKAuthor: ARGUS Collaboration
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Published: 1993
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DOWNLOAD EBOOKAuthor: Dana Lindemann
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Published: 2012
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DOWNLOAD EBOOK"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." --
Author: Kuriakose Panose
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Published: 1992
Total Pages: 136
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Published: 1998
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DOWNLOAD EBOOKThe high cross-section for the production of b quarks at the Tevatron hadron collider make it an ideal place to search for rare B meson species and very low branching fraction decay modes of the more common B mesons. This paper reports the recent discovery of the Bc meson by the CDF collaboration. It also discusses the observation of rare B meson final states involving?(2S) mesons and searches for ultra-rare decays such as B 2!??−
Author: Curtis William Ward
Publisher:
Published: 1998
Total Pages: 374
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DOWNLOAD EBOOKAuthor: Michael G. Greene
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Published: 2006
Total Pages: 167
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DOWNLOAD EBOOKThis thesis describes a search for the rare decay B + {yields} mu+numugamma, performed at the Stanford Linear Accelerator Center. The BABAR detector is used to analyze 81.65 fb{sup -1} of data, with (88.6 {+-} 0.6) x 10{sup 6} charged B meson decays, from the PEP-II e{sup +}e{sup -} collider running at the Upsilon(4S) resonance. The background estimate for the analysis is three events, and three signal candidates are observed. An upper limit on the branching fraction is set at B (B+ {yields} mu +numugamma)
Author: Lei Zhang
Publisher:
Published: 2004
Total Pages: 368
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DOWNLOAD EBOOKAuthor: John Gregg Thayer
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Published: 2004
Total Pages: 288
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DOWNLOAD EBOOKAuthor: ARGUS Collaboration
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Published: 1989
Total Pages: 4
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