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Author : Mousumi Datta
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (89 download)
Download or read book A Search for the Rare Leptonic B Decay B to Tau Nu Recoiling Against B to Dstar-zero 1 Nu written by Mousumi Datta and published by . This book was released on 2005 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download A Search for B+ --] Tau+ Nu Tau Recoiling Against B- --] D0 L- Nu-bar L X. PDF Online Free](https://books.google.com/books/content/images/frontcover/y7PjjwEACAAJ?fife=w200-h370)
Download or read book A Search for B+ --] Tau+ Nu Tau Recoiling Against B- --] D0 L- Nu-bar L X. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for the decay B[sup+][yields][tau][sup+][nu][sub[tau]] in 88.9 x 10[sup 6][Upsilon](4S) decays recorded with the BABAR detector at the SLAC B-Factory. A sample of semi-exclusive, semi-leptonic B decays (B[sup -][yields] D[sup 0][ell][sup -][bar[nu]][sub[ell]]X), where X is either a photon, [pi][sup 0], or nothing, is used to identify the daughter particles that are associated with the other B meson in each event. These particles are searched for evidence of a one-prong leptonic B[sup+][yields][tau][sup+][nu][sub[tau]] decay. For this data sample we set a preliminary upper limit on the branching fraction of[Beta](B[sup+][yields][tau][sup+][nu][sub[tau]])
![Download A Search for B+ --] Tau + Nu Tau Recoiling Against B- --] D0 L- Nu-bar L X. PDF Online Free](https://books.google.com/books/content/images/frontcover/AeLYjwEACAAJ?fife=w200-h370)
Author : Stephen J. Sekula
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (316 download)
Download or read book A Search for B+ --] Tau + Nu Tau Recoiling Against B- --] D0 L- Nu-bar L X. written by Stephen J. Sekula and published by . This book was released on 2003 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for the decay B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} in 88.9 x 10{sup 6} {Upsilon}(4S) decays recorded with the BABAR detector at the SLAC B-Factory. A sample of semi-exclusive, semi-leptonic B decays (B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}}X), where X is either a photon, {pi}{sup 0}, or nothing, is used to identify the daughter particles that are associated with the other B meson in each event. These particles are searched for evidence of a one-prong leptonic B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} decay. For this data sample we set a preliminary upper limit on the branching fraction of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}})
Author : The ARGUS Collaboration
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Search for the Decay Tau - to Nu Tau Eta Pi- written by The ARGUS Collaboration and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Search for the Rare Leptonic Decay B- -] Tau- Nubar PDF Online Free](https://books.google.com/books/content/images/frontcover/54GyDAEACAAJ?fife=w200-h370)
Download or read book Search for the Rare Leptonic Decay B- -] Tau- Nubar written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for the decay B[sup -] [yields] [tau][sup -] [bar [nu]][sub [tau]] in a sample of 88.9 x 10[sup 6] B[bar B]pairs recorded with the BABAR detector at the SLAC B-Factory. One of the two B mesons from the [Upsilon](4S) is reconstructed in a hadronic or a semileptonic final state and the decay products of the other B in the event are analyzed for consistency with a B[sup -] [yields] [tau][sup -] [bar [nu]][sub [tau]] decay. We find no evidence of a signal and set an upper limit on the branching fraction of [Beta](B[sup -] [yields] [tau][sup -] [bar [nu]][sub [tau]])
![Download A Search for the Rare Decay B-]tau+tau- at the BaBar Experiment PDF Online Free](https://books.google.com/books/content/images/frontcover/LcfQjwEACAAJ?fife=w200-h370)
Author : Christopher Thomas Potter
Publisher :
ISBN 13 :
Total Pages : 223 pages
Book Rating : 4.:/5 (316 download)
Download or read book A Search for the Rare Decay B-]tau+tau- at the BaBar Experiment written by Christopher Thomas Potter and published by . This book was released on 2006 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Standard Model of particle physics predicts that the branching ratio for the rare decay B{sup 0} {yields} {tau}{sup +}{tau}{sup -} is 3.1 x 10{sup -8}, though untested models which could supersede it predict large enhancements. This dissertation describes the search for this rare decay in 210.4 fb{sup -1} of B{sup 0}{bar B}{sup 0} data collected at the {Upsilon}(4S) resonance in the Babar detector at the Stanford Linear Accelerator Center. In the analysis, one neutral B meson is fully reconstructed in a hadronic mode and recoil events which are consistent with each tau decaying in a mode {tau} {yields} {pi}{nu}, {rho}{nu}, or l{nu}{bar {nu}} are selected. There is no evidence for signal. The result is consistent with a downward fluctuation by 1.1 statistical standard deviations of the expected Standard Model background. Taking the expected background, the number of observed events and the expected statistical and systematic errors into account yields 2.7 x 10{sup -3} as the upper limit for B{sup 0} {yields} {tau}{sup +}{tau}{sup -} at the 90% confidence level.
![Download A Search for the Decay B+ ---] Tau+ Nu/Tau at BaBar PDF Online Free](https://books.google.com/books/content/images/frontcover/fhV8AQAACAAJ?fife=w200-h370)
Author : M. Datta
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (316 download)
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}
![Download Search for the Decay[tau][sup -][yields] 4[pi][sup -]3[pi][sup+]([pi][sup 0][nu][sub[tau]. PDF Online Free](https://books.google.com/books/content/images/frontcover/Hi8CkAEACAAJ?fife=w200-h370)
Download or read book Search for the Decay[tau][sup -][yields] 4[pi][sup -]3[pi][sup+]([pi][sup 0][nu][sub[tau]. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for the decay of the[tau] lepton into seven charged particles and zero or one[pi][sup 0]. The data used in the search were collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR) and correspond to an integrated luminosity of 4.61 fb[sup 1]. No evidence for a signal is found. Assuming all the charged particles are pions, we set an upper limit on the branching fraction, B([tau][sup -][yields] 4[pi][sup -]3[pi][sup+]([pi][sup 0])[nu][sub[tau]])
![Download A Search for the Decays B+ Arrow] L+nu and B[degree]arrow L+ Tau- (l PDF Online Free](https://books.google.com/books/content/images/frontcover/js20oQEACAAJ?fife=w200-h370)
Author : Miika A. Klemetti
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (891 download)
Download or read book A Search for the Decays B+ Arrow] L+nu and B[degree]arrow L+ Tau- (l written by Miika A. Klemetti and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "We present searches for the leptonic decays B + [arrow] l+nu and the lepton flavor violating decays B[degree][arrow] l[symbol][tau][symbol], where l = e, [mu], with data collected by the BABAR experiment at SLAC. These searches utilize a technique in which we fully reconstruct the accompanying B̄ in [Upsilon](4S)[arrow] BB̄ events, and look for a monoenergetic lepton in the signal B frame. The signal yield in the data is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378 million BB̄ pairs (342 fb-1), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of B (B+[arrow] e +[nu])
![Download A Search for B[sup +] --] [tau][sup +][nu][sub [tau] Recoiling Against B[sup -] --] D*[sup 0][ell][sup -][bar [nu][sub [ell]]. PDF Online Free](https://books.google.com/books/content/images/frontcover/mL39jwEACAAJ?fife=w200-h370)
Download or read book A Search for B[sup +] --] [tau][sup +][nu][sub [tau] Recoiling Against B[sup -] --] D*[sup 0][ell][sup -][bar [nu][sub [ell]]. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a search for the decay B[sup +] --> [tau][sup +][nu][sub [tau]] in 124.1 x 10[sup 6] [Upsilon](4S) decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay (B[sup -] --> D*[sup 0][ell][sup -][bar [nu]][sub [ell]]) is selected, and in the recoil a search for B[sup +] --> [tau][sup +][nu][sub [tau]] signal is performed. The [tau] is identified in the following channels: [tau][sup +] --> e[sup +][nu][sub e][bar [nu]][sub [tau]] --> [mu][sup +][nu][sub [mu]][bar [nu]][sub [tau]], [tau][sup +] --> [pi][sup +][bar [nu]][sub [tau]], [tau][sup +] --> [pi][sup +][pi][sup 0][bar [nu]][sub [tau]], [tau][sup +] --> [pi][sup +][pi][sup -][pi][sup +][bar [nu]][sub [tau]]. The authors find no evidence of signal, and they set a preliminary upper limit on the branching fraction of B(B[sup +] --> [tau][sup +][nu][sub [tau]]) 4.3 x 10[sup -4] at the 90% confidence level (CL). This result is then combined with a statistically independent BABAR search for B[sup +] -- [tau][sup +][nu][sub [tau]] to give a combined preliminary limit of B(B[sup +] --> [tau][sup +][nu][sub [tau]])
Author : B. Aubert
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (316 download)
Download or read book Search for the Decay $\tau^- \rightarrow 3\pi^- 2\pi^+2\pi^0 \nu_\tau$ written by B. Aubert and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay of the {tau} lepton to five charged and two neutral pions is performed using data collected by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider. The analysis uses 232 fb{sup -1} of data at center-of-mass energies on or near the {Upsilon}(4S) resonance. We observe 10 events with an expected background of 6.5{sub -1.4}{sup +2.0} events. In the absence of a signal, we set the limit on the branching ratio {Beta}({tau}{sup -} {yields} 3{pi}{sup -}2{pi}{sup +}2{pi}{sup 0}{nu}{sub {tau}})
![Download A Search for B -] Tau Nu Recoiling Against B- -] D0 L- Nu X. PDF Online Free](https://books.google.com/books/content/images/frontcover/klXowQEACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (16 download)
Download or read book A Search for B -] Tau Nu Recoiling Against B- -] D0 L- Nu X. written by and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a search for the decay B → l+?{sub l} (l =?,?, or e) in (458.9 ± 5.1) x 106 B{bar B} pairs recorded with the BABAR detector at the PEP-II B-Factory. They search for these B decays in a sample of B+B− events where one B-meson is reconstructed as B− → D°{ell}−{bar?}X. Using the method of Feldman and Cousins, they obtain?(B+ →?+?{sub {tau}}) = (1.7 ± 0.8 ± 0.2) x 10−4, which excludes zero at 2.3?. They interpret the central value in the context of the Standard Model and find the B meson decay constant to be f{sub B}2 = (62 ± 31) x 103 MeV2. They find no evidence for B+ → e+?{sub e} and B+ →?+?{sub?} and set upper limits at the 90% C.L.?(B+ → e+?{sub e})
![Download Evidence for B+ --] Tau+ Nu_tau Decays Using Hadronic B Tags PDF Online Free](https://books.google.com/books/content/images/frontcover/lZO6wgEACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (16 download)
Download or read book Evidence for B+ --] Tau+ Nu_tau Decays Using Hadronic B Tags written by and published by . This book was released on 2011 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for the decay B -->?+?{sub?} using 467.8 x 106 B{anti B} pairs collected at the?(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We select a sample of events with on completely reconstructed B− in an hadronic decay mode (B− --> D{sup (*)0}X− and B− --> J/? X−). We examine the rest of the event to search for a B+ -->?+?{sub?} decay. We identify the?+ lepton in the following modes:?+ --> e+?{sub e}{anti?}{sub?},?+ -->?+?{sub {mu}}{anti {nu}}{sub {tau}}, {tau}+ -->?+{anti {nu}}{sub {tau}} and {tau}+ -->?{anti {nu}}{sub {tau}}. We find an excess of events with respect to expected background, which excludes the null signal hypothesis at the level of 3.3? and can be converted to a branching fraction central value of B(B+ --> {tau}+ {nu}{sub {tau}})= (1.80{sup + 0.57}{sub - 0.54}(stat.) ± 0.26 (syst.)) x 10−4.
![Download A Search for B{sup +} --] {tau}{sup +}{nu}{sub {tau}} Recoiling Against B{sup -} --] D*{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}} PDF Online Free](https://books.google.com/books/content/images/frontcover/06vFjwEACAAJ?fife=w200-h370)
Author : B. Aubert
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (316 download)
Download or read book A Search for B{sup +} --] {tau}{sup +}{nu}{sub {tau}} Recoiling Against B{sup -} --] D*{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}} written by B. Aubert and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a search for the decay B{sup +} --> {tau}{sup +}{nu}{sub {tau}} in 124.1 x 10{sup 6} {Upsilon}(4S) decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay (B{sup -} --> D*{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}}) is selected, and in the recoil a search for B{sup +} --> {tau}{sup +}{nu}{sub {tau}} signal is performed. The {tau} is identified in the following channels: {tau}{sup +} --> e{sup +}{nu}{sub e}{bar {nu}}{sub {tau}} --> {mu}{sup +}{nu}{sub {mu}}{bar {nu}}{sub {tau}}, {tau}{sup +} --> {pi}{sup +}{bar {nu}}{sub {tau}}, {tau}{sup +} --> {pi}{sup +}{pi}{sup 0}{bar {nu}}{sub {tau}}, {tau}{sup +} --> {pi}{sup +}{pi}{sup -}{pi}{sup +}{bar {nu}}{sub {tau}}. The authors find no evidence of signal, and they set a preliminary upper limit on the branching fraction of B(B{sup +} --> {tau}{sup +}{nu}{sub {tau}}) 4.3 x 10{sup -4} at the 90% confidence level (CL). This result is then combined with a statistically independent BABAR search for B{sup +} -- {tau}{sup +}{nu}{sub {tau}} to give a combined preliminary limit of B(B{sup +} --> {tau}{sup +}{nu}{sub {tau}})
Author :
Publisher : ScholarlyEditions
ISBN 13 : 1464963282
Total Pages : 8864 pages
Book Rating : 4.4/5 (649 download)
Download or read book Issues in General Physics Research: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 8864 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in General Physics Research / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about General Physics Research. The editors have built Issues in General Physics Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about General Physics Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in General Physics Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (16 download)
Download or read book Searches for the Decays B0 to L+- Tau-+ and B+ to L+ Nu(L written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present searches for the leptonic decays B → l+? and the lepton flavor violating decays B° → l{sup {+-}}?{sup {-+}}, where l = e,?, with data collected by the BABAR experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying {bar B} in?(4S) → B{bar B} events, and look for a monoenergetic lepton from the signal B decay. The signal yield is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378 million B{bar B} pairs (342 fb−1), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of?(B+ → e+?)
Author : Mousumi Datta
Publisher :
ISBN 13 :
Total Pages : 195 pages
Book Rating : 4.:/5 (316 download)
Download or read book A Search for the Rare Leptonic B- to Tau- Anti-neutrino Recoiling Against B+ to Decays to Anti-D*0 L+ Lepton-neutrino written by Mousumi Datta and published by . This book was released on 2006 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a search for the decay B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}} in 231.8 x 10{sup 6} {Upsilon}(4S) decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay (B{sup +} {yields} {bar D}*{sup 0} {ell}{sup +}{nu}{sub {ell}}) is selected, and in the recoil a search for B{sup -} {yields} {tau}{sup -} {bar {nu}}{sub {tau}} signal is performed in the following {tau} decay modes: {tau}{sup -} {yields} e{sup -}{bar {nu}}{sub e}{nu}{sub {tau}}, {tau}{sup -} {yields} {mu}{sup -}{bar {nu}}{sub {mu}}{nu}{sub {tau}}, {tau}{sup -} {yields} {pi}{sup -}{nu}{sub {tau}}, {tau}{sup -} {yields} {pi}{sup -}{pi}{sup 0}{nu}{sub {tau}}, and {tau}{sup -} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup -}{nu}{sub {tau}}. They find no evidence of signal, and they set a preliminary upper limit on the branching fraction of {beta}(B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}})
