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B C Tau Nu Semileptonic Decays
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Book Synopsis Observation of the Semileptonic Decays B to D*taunu and Evidence for B to D Tau Nu by :
Download or read book Observation of the Semileptonic Decays B to D*taunu and Evidence for B to D Tau Nu written by and published by . This book was released on 2007 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the semileptonic decays B− → D°?−{bar {nu}}{sub?}, B− → D{sup *0}?−{bar {nu}}{sub?}, B− → D?−{bar {nu}}{sub {tau}}, and B− → D{sup *+}{tau}−{bar {nu}}{sub {tau}}, which are potentially sensitive to non-Standard Model amplitudes, The data sample comprises 232 x 106?(4s) → B{bar B} decays collected with the BABAR detector. From a combined fit to B− and {bar B}° channels, we obtain the branching fractions?(B → D{sub {tau}}−{bar {nu}}{sub {tau}}) = (0:86 ± 0:24 ± 0:11 ± 0:06)% and?(B → D*{tau}−{bar {nu}}{sub {tau}}) = (1:62 ± 0:31 ± 0:10 ± 0:05)% (normalized for the {bar B}°), where the uncertainties are statistical, systematic, and normalization-mode-related.
Book Synopsis Measurement of the Semileptonic Decays B-]D Tau Nu and B-]D* Tau Nu by :
Download or read book Measurement of the Semileptonic Decays B-]D Tau Nu and B-]D* Tau Nu written by and published by . This book was released on 2009 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present measurements of the semileptonic decays B− → D°?− {bar?}{sub?}, B− → D*°?−{bar {nu}}{sub?}, {bar B}° → D?− {bar {nu}}{sub?}, and {bar B}° → D*+?−{bar {nu}}{sub?}, which are sensitive to non-Standard Model amplitudes in certain scenarios. The data sample consists of 232 x 106?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II e+e− collider. They select events with a D or D* meson and a light lepton (l = e or?) recoiling against a fully reconstructed B meson. They perform a fit to the joint distribution of lepton momentum and missing mass squared to distinguish signal B → D{sup (*)}?− {bar {nu}}{sub?} ({tau}− → l− {bar {nu}}{sub l}{nu}{sub {tau}}) events from the backgrounds, predominantly B → D{sup (*)} l−{bar {nu}}{sub l}. They measure the branching-fraction ratios R(D) {triple_bond}?(B → D{tau}− {bar {nu}}{sub {tau}})/?(B → Dl− {bar {nu}}{sub {ell}}) and R(D*) {triple_bond}?(B → D*{tau}− {bar {nu}}{sub {tau}})/?(B → D* {ell}− {bar {nu}}{sub {ell}}) and, from a combined fit to B− and {bar B}° channels, obtain the results R(D) = (41.6 ± 11.7 ± 5.2)% and R(D*) = (29.7 ± 5.6 ± 1.8)%, where the uncertainties are statistical and systematic. Normalizing to measured B− → D{sup (*)0} {ell}− {bar {nu}}{sub {ell}} branching fractions, they obtain?(B → D{tau}− {bar {nu}}{sub {tau}}) = (0.86 ± 0.24 ± 0.11 ± 0.06)% and?(B → D*{tau}− {bar {nu}}{sub {tau}}) = (1.62 ± 0.31 ± 0.10 ± 0.05)%, where the additional third uncertainty is from the normalization mode. They also present, for the first time, distributions of the lepton momentum,
Book Synopsis B to Tau Leptonic and Semileptonic Decays by :
Download or read book B to Tau Leptonic and Semileptonic Decays written by and published by . This book was released on 2011 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decays of B mesons to states involving [tau] leptons can be used as a tool to search for the effects of new physics, such as those involving a charged Higgs boson. The experimental status of the decays B → [tau][nu] and B → D{sup (*)}[tau][nu] is discussed, together with limits on new physics effects from current results. Leptonic and semileptonic decays of B mesons into states involving [tau] leptons remain experimentally challenging, but can prove a useful tool for constraining Standard Model parameters, and also offer to constrain the effects of any new physics that may exist including the presence of a charged Higgs boson.
Book Synopsis B -> C Tau Nu Semileptonic Decays by : Neus Penalva Martínez
Download or read book B -> C Tau Nu Semileptonic Decays written by Neus Penalva Martínez and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Semileptonic decays of B-mesons into τντ [tau ny tau] by : Patrick Heiliger
Download or read book Semileptonic decays of B-mesons into τντ [tau ny tau] written by Patrick Heiliger and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Semileptonic decays of B-mesons into tau ny tau by : Patrick Heiliger
Download or read book Semileptonic decays of B-mesons into tau ny tau written by Patrick Heiliger and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Semileptonic decays of B-mesons into _t63_n63_1tn_t63 [tau ny tau] by : Patrick Heiliger
Download or read book Semileptonic decays of B-mesons into _t63_n63_1tn_t63 [tau ny tau] written by Patrick Heiliger and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Semileptonic decays of B-mesons into tnt [tau ny tau] by : Patrick Heiliger
Download or read book Semileptonic decays of B-mesons into tnt [tau ny tau] written by Patrick Heiliger and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Semileptonic Anti-B to D(*) Tau Anti-Nu/Tau Decays at BaBar by :
Download or read book Measurement of the Semileptonic Anti-B to D(*) Tau Anti-Nu/Tau Decays at BaBar written by and published by . This book was released on 2011 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semileptonic B meson decays into final states containing the [tau] lepton are of interesting as they provide information on the Standard Model as well as a window on new physics effects. We present results on {bar B} → D{sup (*)} [tau]{bar {nu}}{sub {tau}} decays where the second B in the event is fully reconstructed.
Book Synopsis Semileptonic Decays $B\rightarrow D{̂(*)}l\nu$ at Nonzero Recoil by :
Download or read book Semileptonic Decays $B\rightarrow D{̂(*)}l\nu$ at Nonzero Recoil written by and published by . This book was released on 2013 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Semileptonic B Decays And of Lepton Flavor Violating Tau Decays at BaBar by :
Download or read book A Study of Semileptonic B Decays And of Lepton Flavor Violating Tau Decays at BaBar written by and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of the semileptonic B decays at BABAR is presented. The results shown include measurements of the moments of hadronic-mass and electron-energy of the decay B → X{sub c}l[nu]; a determination of the.
Book Synopsis Study of Exclusive Semileptonic B Meson Decays to Tau Leptons by : Michael A. Mazur
Download or read book Study of Exclusive Semileptonic B Meson Decays to Tau Leptons written by Michael A. Mazur and published by ProQuest. This book was released on 2007 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search for four exclusive semileptonic decays B & rarr; D(*)tau -nutau in 209 fb -1 of data collected with the BABAR detector, corresponding to 232 million e+e - & rarr; Upsilon(4S) & rarr; B B events. We select events with a D (*) meson and a light lepton (e or mu) recoiling against a fully-reconstructed B meson. We perform a fit to the lepton spectrum and missing mass squared to discriminate signal events from backgrounds, predominantly B & rarr; D (*) & ell;-nu & ell; . A control sample of identified D** & ell;- nu & ell; events is included in the fit to estimate the background contribution from these decays. We measure B (B & rarr; Dtaunu) = (0.86+/-0.24+/-0.11+/-0.06)% and B (B & rarr; D*taunu) = (1.62+/-0.31+/-0.10+/-0.05)%, where the errors are statistical, systematic, and normalization-mode related, respectively, and where the results are expressed for the B0 lifetime.
Book Synopsis Hadronic Moments of the Inclusive Semileptonic Decay B -> X[tau]v[superscript Bar][subscript Tau]. by : James W. Walden
Download or read book Hadronic Moments of the Inclusive Semileptonic Decay B -> X[tau]v[superscript Bar][subscript Tau]. written by James W. Walden and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis B ---] Mu Mu and B ---] Tau Nu Decays by :
Download or read book B ---] Mu Mu and B ---] Tau Nu Decays written by and published by . This book was released on 2009 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the most recent experimental results on Branching Fractions of rare fully leptonic B decays is given; constraints on the parameters of some New Physics models are presented. Perspectives with new accelerator programs are discussed.
Download or read book B Decays written by Sheldon Stone and published by World Scientific. This book was released on 1994 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2nd edition is an extensive update of "B Decays?. The revisions are necessary because of the extensive amount of new data and new theoretical ideas. This book reviews what is known about b-quark decays and also looks at what can be learned in the future.The importance of this research area is increasing, as evidenced by the approval of the luminosity upgrade for CESR and the asymmetric B factories at SLAC and KEK, and the possibility of experiments at hadron colliders.The key experimental observations made thus far, measurement of the lifetimes of the different B species, B0-B0 mixing, the discovery of ?Penguin? mediated decays, and the extraction of the CKM matrix elements Vub and Vcb from semileptonic decays, as well as more mundane results, are described in great detail by the experimentalists who have been closely involved with making the measurements. Theoretical progress in understanding b-quark decays using HQET and lattice gauge techniques are described by theorists who have developed and used these techniques.Synthesizing the experimental and theoretical information, several articles discuss the implications for the ?Standard Model? and how further tests can be done using measurements of CP violation in the B system.
Book Synopsis Searches for Leptonic B-Decays and B to D(*) Tau Nu/Tau at the B-Factories by :
Download or read book Searches for Leptonic B-Decays and B to D(*) Tau Nu/Tau at the B-Factories written by and published by . This book was released on 2013 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for the Decay B+ ---] Tau+ Nu/Tau at BaBar by : M. Datta
Download or read book A Search for the Decay B+ ---] Tau+ Nu/Tau at BaBar written by M. Datta and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on an 87-fb{sup -1} dataset collected by the Babar detector at the PEP-II asymmetric-energy B-Factory, a search for D{sup 0}-{bar D}{sup 0} mixing has been made using the semileptonic decay modes D*{sup +} {yields} {pi}{sup +}D{sup 0}, D{sup 0} {yields} Ke{nu} (+c.c.). The use of these modes allows unambiguous flavor tagging and a combined fit of the D{sup 0} decay time and D*{sup +}-D{sup 0} mass difference ({Delta}M) distributions. The high-statistics sample of unmixed semileptonic D{sup 0} decays is used to model the {Delta}M distribution and time-dependence of mixed events directly from the data. Neural networks are used to select events and reconstruct the D{sup 0}. A result consistent with no charm mixing has been obtained, R{sub mix} = 0.0023 {+-} 0.0012 {+-} 0.0004. This corresponds to an upper limit of R{sub mix}
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