Download or read book Search for Rare Quark Annihilation Decays Charged B Mesons Decaying to Charged D S Mesons And Phi Mesons written by and published by . This book was released on 2008 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on a search for the decay B{sup {+-}} 2!D{sub s}{sup (*){+-}} [phi] using 212.2 fb−1 of data collected with the BABAR detector at the PEP-II B Factory at the Stanford Linear Accelerator Center between 1999 and 2004. This sample of 234 x 106 ee− 2 2!B{bar B} events yields no significant signal. They report the Bayesian upper limits [Beta](B{sup {+-}} 2!D{sub s}{sup {+-}} [phi]) x [Beta](D{sub s}{sup {+-}} 2![phi][pi]{sup {+-}})
Download or read book Search for Rare Quark annihilation Decays B Mesons Decaying to D s Mesons and Phi Mesons written by J. Adam M. Cunha and published by ProQuest. This book was released on 2006 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the decay B+/- & rarr; D*+/- sf using 212.2 fb-1 of data collected with the BABAR detector at the PEP-II B Factory at the Stanford Linear Accelerator Center between 1999 and 2004. This sample of 234 x 106 e+e- & rarr; Upsilon(4 S) & rarr; BB ̄ events yields no significant signal. We report the Bayesian upper limits B (B+/- & rarr; D+/-sf) x B (D+/-s & rarr; & phis;pi+/- )
Download or read book A Search for the Rare Decay B Meson to Two Photons written by Andrew Michael Ruland and published by . This book was released on 2010 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a search for the rare radiative decay of a B meson to two photons. where the charged congugate mode is implied throughout. These decays are highly suppressed in the Standard Model where the branching fraction is expected to be of order 10^-8. In some new physics scenarios this could be enhanced by up to an order of magnitude to 10^-7. Therefore an observation of a significant signal above the Standard Model prediction could be a sign of new physics. The search for this rare decay was performed using the data collected with the BaBar detector at the SLAC National Accelerator Laboratory PEP-II storage ring operating at the Upsilon(4S) resonance. The analysis uses a dataset with an integrated luminosity of 425.7 fb-1 corresponding to 467 million BB pairs. A signal yield of 21.3 +12.8 -11.8 events with a significance of 1.88 sigma was measured using an unbinned extended maximum likelihood fit. An upper limit on the branching fraction is set at the 90% confidence level of less than 3.2 times 10^-7. This is about two times more stringent than the best upper limit of less than 6.2 times 10^-7 published by the Belle collaboration.
Download or read book Search for the Decay of a Charged B Meson to a Charged Rho Meson and a F0 980 Meson written by Zafar Yasin and published by . This book was released on 2009 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semileptonic B Meson to D star Meson Decay written by Mauricio Garcia-Sciveres and published by . This book was released on 1994 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book B Meson Decays to Mega K Omega Rho Omega Omega Omega Phi and Omega F0 written by J. C. Chen and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors describe searches for B meson decays to the charmless vector-vector final states {omega}K*, {omega}p, {omega}{omega}, and {omega}{phi} with 233 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation at {radical}s = 10.58 GeV. They also search for the vector-scalar B decay to {omega}f{sub 0}.
Download or read book Search for the Rare Quark annihilation Decays B Ds Phi written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on searches for B− → D{sub s}− ? and B− → D*{sub s}− ?. In the context of the Standard Model, these decays are expected to be highly suppressed since they proceed through annihilation of the b and {bar u} quarks in the B− meson. Our results are based on 234 million ?(4S) → B{bar B} decays collected with the BABAR detector at SLAC. We find no evidence for these decays, and we set Bayesian 90% confidence level upper limits on the branching fractions ?(B− → D{sub s}−?)
Download or read book Search for Doubly Cabibbo Suppressed Decays of the Charged D Meson written by and published by . This book was released on 1992 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The doubly Cabibbo suppressed decayed D → K+?{sup −}?+, D+ → K+?°and D+ → K*+?° are searched for in a 9.56 pb{sup −1} data sample of e+e{sup −} annihilation events collected near the?(3770) resonance with the Mark 3 detector at the SPEAR storage ring, at the Stanford Linear Accelerator Center. These rare weak decays are naively expected at a rate of tan4?{sub c} relative to corresponding Cabibbo allowed decays. In the context of presently accepted models of hadronic weak decays, however, they are anticipated to be enhanced, making their experimental detection feasible in the Mark 3 data set. The experimentally simplest decay channel D+ → K+?{sup −}?+ is searched for inclusively through conventional analysis techniques. A signal of approximately 2.5? significance is obtained. An independent analysis is performed to establish examples of this decay of D+ → K+?° and K*+?° by full reconstruction of D+D{sup −} events. Exploiting the two body kinematics of?(3770) → D{bar D}, this second approach obtains significantly smaller backgrounds than the inclusive study. Consistent with the inclusive results, three D+ → K+?{sup −}?+ candidate events are observed. No events are observed for either D+ → K+?° or K*+?°. The branching fraction for D+ → K+?{sup −}?+ is measured, and limits are established on the branching fractions for D+ → K+?° and K*+?°. These results are used to confront the theoretical predictions from models of the weak hadronic decays of charmed mesons.
Download or read book A Search for B Meson Decay to a Muon a Neutrino and a Photon written by Michael G. Greene and published by . This book was released on 2006 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 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)
Download or read book Rare B Decays from the CDF Experiment written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The 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!??−
Download or read book Rare Decays of Light Mesons written by Benjamin Mayer and published by Atlantica Séguier Frontières. This book was released on 1990 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of B Meson Decays with Excited Eta and Eta prime Mesons written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using 383 million B{bar B} pairs from the BABAR data sample, they report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to K{bar K}* or [eta][pi][pi] final states with mass in the range (1.2-1.8) GeV/c2. They observe a significant enhancement at the low K{bar K}* invariant mass which is interpreted as B 2K, find evidence for the decay B+ 2K+, and place upper limits on the decays B+ 2K+, B+ 2!f1(1285)K+, B+ 2!f1(1420)K+, and B+ 2K+.
Download or read book Search for Exclusive Rare Baryonic Decays of B Mesons written by Curtis William Ward and published by . This book was released on 1998 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Searches for B Meson Decays to Phiphi Phirho Phif0 980 and F0 980 f0 980 Final States written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of searches for B decays to charmless final states involving?, f0(980), and charged or neutral? mesons. The data sample corresponds to 384 x 106 B{bar B} pairs collected with the BABAR detector operating at the PEP-II asymmetric-energy ee− collider at SLAC. We find no significant signals and determine the following 90% confidence level upper limits on the branching fractions, including systematic uncertainties:?(B° →??)
Download or read book Search for Doubly Cabibbo Suppressed Decays of the Charged D Meson written by Jonathan Freeman Labs and published by . This book was released on 1992 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the B Meson Decay to Eta Phi written by and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Rare Decay of a B Meson to a K Meson and Two Neutrinos written by John Gregg Thayer and published by . This book was released on 2004 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
