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Author: Publisher: ISBN: Category : Languages : en Pages : 8
Book Description
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])
Author: Publisher: ISBN: Category : Languages : en Pages : 8
Book Description
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])
Author: Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
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])
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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])
Author: James Paul Morris Publisher: ISBN: Category : Languages : en Pages : 153
Book Description
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.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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])
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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])
Author: Publisher: ISBN: Category : Languages : en Pages : 197
Book Description
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.
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Author: ![Search for the Decay B[sup 0][yields] Gamma-gamma PDF](https://books.google.com/books/content/images/frontcover/XQK9jwEACAAJ?fife=w80-h100)
Author: ![Search for the Decay D0 -] [gamma][gamma] and Measurement of the Decay D0 -] [pi]0 [pi]0 PDF](https://books.google.com/books/content/images/frontcover/8aVaAQAACAAJ?fife=w80-h100)
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Author: A. E. Blinov
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Author: Howard Fred Davis
Author: ![A Search for the Rare Decay B0 2![gamma][gamma]. PDF](https://books.google.com/books/content/images/frontcover/QIFPAQAACAAJ?fife=w80-h100)
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