A Search for the Rare Leptonic B Decay B to Tau Nu Recoiling Against B to Dstar-zero 1 Nu
Author: Mousumi Datta
Publisher:
Published: 2005
Total Pages: 220
ISBN-13:
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A Search for the Rare Leptonic B- to Tau- Anti-neutrino Recoiling Against B+ to Decays to Anti-D*0 L+ Lepton-neutrino
Author: Mousumi Datta
Publisher:
Published: 2006
Total Pages: 195
ISBN-13:
DOWNLOAD EBOOKThis 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}})
Search for the Rare Leptonic Decay B- -] Tau- Nubar
Author:
Publisher:
Published: 2004
Total Pages:
ISBN-13:
DOWNLOAD EBOOKWe 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]])
A Search for B+ --] Tau + Nu Tau Recoiling Against B- --] D0 L- Nu-bar L X.
Author: Stephen J. Sekula
Publisher:
Published: 2003
Total Pages: 22
ISBN-13:
DOWNLOAD EBOOKWe 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}})
A Search for B+ --] Tau+ Nu Tau Recoiling Against B- --] D0 L- Nu-bar L X.
Author:
Publisher:
Published: 2003
Total Pages:
ISBN-13:
DOWNLOAD EBOOKWe 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]])
A Search for B[sup +] --] [tau][sup +][nu][sub [tau] Recoiling Against B[sup -] --] D*[sup 0][ell][sup -][bar [nu][sub [ell]].
Author:
Publisher:
Published: 2004
Total Pages:
ISBN-13:
DOWNLOAD EBOOKThe 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]])
A Search for B --]?+?{sub {tau}} Recoiling Against B− --] D*°l−{bar {nu}}{sub {ell}}
Author:
Publisher:
Published: 2004
Total Pages: 5
ISBN-13:
DOWNLOAD EBOOKThe authors present a search for the decay B -->?+?{sub?} in 124.1 x 106?(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− --> D*°l−{bar?}{sub {ell}}) is selected, and in the recoil a search for B+ -->?+?{sub?} signal is performed. The? is identified in the following channels:?+ --> e+?{sub e}{bar?}{sub?} -->?+?{sub {mu}}{bar?}{sub?},?+ -->?+{bar {nu}}{sub?}, {tau}+ -->?+?°{bar {nu}}{sub {tau}}, {tau}+ -->?+?−?+{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+ --> {tau}+{nu}{sub {tau}}) 4.3 x 10−4 at the 90% confidence level (CL). This result is then combined with a statistically independent BABAR search for B+ -- {tau}+{nu}{sub {tau}} to give a combined preliminary limit of B(B+ --> {tau}+{nu}{sub {tau}})
A Search for B{sup +} --] {tau}{sup +}{nu}{sub {tau}} Recoiling Against B{sup -} --] D*{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}}
Author: B. Aubert
Publisher:
Published: 2004
Total Pages: 5
ISBN-13:
DOWNLOAD EBOOKThe 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}})
A Search for B -] Tau Nu Recoiling Against B- -] D0 L- Nu X.
Author:
Publisher:
Published: 2009
Total Pages: 8
ISBN-13:
DOWNLOAD EBOOKThe 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})
Searches for Leptonic B-Decays and B to D(*) Tau Nu/Tau at the B-Factories
Author:
Publisher:
Published: 2013
Total Pages: 7
ISBN-13:
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