Download or read book Search for the Decay B 2 gamma gamma written by and published by . This book was released on 2001 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a limit on the branching fraction for the decay B° 2![gamma][gamma] using data collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II asymmetric--energy ee− collider. Based on the observation of one event in the signal region, out of a sample of 21.3 x 106 ee− 2 2!B{bar B} decays, we establish an upper limit on the branching fraction of [Beta] (B° 2![gamma][gamma])
Download or read book A Search for the Rare Decay B rightarrow gamma gamma written by and published by . This book was released on 2011 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the result of a search for the rare decay B° 2![gamma][gamma] in 426 fb−1 of data, corresponding to 226 million B°{bar B}° pairs, collected on the [Upsilon](4S) resonance at the PEP-II asymmetric-energy ee− collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 2112{sup +13} signal events with a statistical signficance of 1.9 [sigma]. This corresponds to a branching fraction [Beta](B° 2![gamma][gamma]) = (1.7 ± 1.1(stat.) ± 0.2(syst.)) x 10−7. Based on this result, we set a 90% confidence level upper limit of [Beta](B° 2![gamma][gamma])
Download or read book Search for the Decay B sup 0 yields Gamma gamma written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a limit on the branching fraction for the decay B[sup 0][yields][gamma][gamma] using data collected at the[Upsilon](4S) resonance with the BABAR detector at the PEP-II asymmetric--energy e[sup+]e[sup -] collider. Based on the observation of one event in the signal region, out of a sample of 21.3 x 10[sup 6] e[sup+]e[sup -][yields][Upsilon](4S)[yields] B[bar B] decays, we establish an upper limit on the branching fraction of[Beta] (B[sup 0][yields][gamma][gamma])
Download or read book Search for the Decay D0 gamma gamma and Measurement of the Decay D0 pi 0 pi 0 written by James Paul Morris and published by . This book was released on 2009 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The Standard Model is the best current description of fundamental interactions and particles; however, the Standard Model has certain shortcomings which have driven particle physicists for the last 30 years to search for phenomena which provide evidence for the next theory beyond the Standard Model. To this end, using the BaBar detector, we search for evidence of the rare decay D* -> D0[pi];D0->[gamma][gamma]. The branching fraction of this decay is enhanced up to 200 times the standard model prediction in certain beyond-the-Standard-Model theories. A measurement of a significant branching fraction would provide evidence for a new theory of particle physics. We describe our search for this rare decay and an improved measurement of the associated decay, B(D0-> [pi]0 [pi]0) using an integrated luminosity corresponding to 470.5 fb−1 of e e− data collected by the BaBar detector at the PEP-II asymmetric ee− collider at SLAC from 1999-2007. We place an upper limit of B(D0->[gamma][gamma]) 2.51 X 10−6 at 90% confidence level and find B(D0-[pi]0[pi]0) = (8.4 " 0.1 " 0.4 " 0.3) X 10−4.
Download or read book Search for Decay gamma rho 0 pi 0 written by A. E. Blinov and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Inclusive B to D Gamma Decay at BaBar written by and published by . This book was released on 2013 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Radiative Decay B0 to Phi Gamma written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We perform a search for the exclusive radiative decay B° 2![phi][gamma], which is dominated by {bar b}d annihilation, in a sample of 124 million B{bar B} events collected with the BABAR detector at the PEP-II asymmetric-energy ee− storage ring at SLAC. No significant signal is seen. We set an upper limit on the branching fraction of [Beta](B° 2![phi][gamma])
Download or read book A Search for the Rare Decay B0 2 gamma gamma written by and published by . This book was released on 2010 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a search for the rare radiative decay B0 → [gamma][gamma], 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.
Download or read book Search for the Decay B sup 0 J psi gamma 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 the results of a search for the radiative decay B[sup 0] --> J/[psi][gamma] in a data set containing 123 million [Upsilon](4S) --> B[bar B] decays, collected by the BABAR detector at the PEP-II asymmetric-energy E[sup +]e[sup -] storage ring at SLAC. They find no evidence for a signal and place an upper limit of B(B[sup 0] --> J/[psi][gamma])
Download or read book Search for the Decay mu E gamma written by Howard Fred Davis and published by . This book was released on 1960 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Decay B J psi gamma written by 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 the results of a search for the radiative decay B° --> J/[psi][gamma] in a data set containing 123 million [Upsilon](4S) --> B{bar B} decays, collected by the BABAR detector at the PEP-II asymmetric-energy Ee− storage ring at SLAC. They find no evidence for a signal and place an upper limit of B(B° --> J/[psi][gamma])
Download or read book Search for the Decay K subscript L Pi0 gamma gamma written by Vaia Papadimitriou and published by . This book was released on 1990 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Decay Mu E Gamma written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This Letter reports a new experimental search for the family-number-nonconserving decay ..mu.. ..-->.. e..gamma ... There is no evidence for the presence of this decay mode. The upper limit for the branching ratio is GAMMA(..mu.. ..-->.. e..gamma..)/GAMMA(..mu.. ..-->.. enu anti nu)
Download or read book Search for the Decay K pi gamma gamma written by Atiya, M. S and published by . This book was released on 1990 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Rare Decay B0bar D 0 Gamma written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the rare decay {bar B}° → D*°[gamma], which in the standard model is dominated by W-exchange. The analysis is based on a data sample comprising 87.8 x 106 B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. No significant signal is observed, and an upper limit on the branching fraction of 2.5 x 10−5 at the 90% confidence level is obtained.
Download or read book The Search for the K pi gamma gamma Decay Above the K p i 2 Peak written by Stephen Scott Adler and published by . This book was released on 1995 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Decay pi 0 gamma X written by Atiya, M. S and published by . This book was released on 1992 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
