Search for the Decay B[sup 0] --] J/[psi] [gamma].
Search for the Decay B[sup 0] --] J/[psi] [gamma].

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Publisher:

Published: 2004

Total Pages:

ISBN-13:

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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])

Search for the Decay B° --] J/[psi] [gamma].
Search for the Decay B° --] J/[psi] [gamma].

Author:

Publisher:

Published: 2004

Total Pages: 5

ISBN-13:

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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])

Search for the Decay D0 -] [gamma][gamma] and Measurement of the Decay D0 -] [pi]0 [pi]0
Search for the Decay D0 -] [gamma][gamma] and Measurement of the Decay D0 -] [pi]0 [pi]0

Author: James Paul Morris

Publisher:

Published: 2009

Total Pages: 153

ISBN-13:

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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.

Search for B+ to X(3872) K+, X(3872) to J/psi Gamma
Search for B+ to X(3872) K+, X(3872) to J/psi Gamma

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Publisher:

Published: 2006

Total Pages: 7

ISBN-13:

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In a study of B 2!J/[psi][gamma]K decays, they find evidence for the radiative decay X(3872) 2!J/[psi][gamma] with a statistical significance of 3.4[sigma]. They measure the product of branching fractions [Beta](B+ 2!X(3872)K+) · [Beta](X(3872) 2!J/[psi][gamma]) = (3.3 ± 1.0 ± 0.3) x 10−6, where the uncertainties are statistical and systematic, respectively. They also measure the branching fraction [Beta](B+ 2![chi]{sub c1}K+) = (4.9 ± 0.20 ± 0.4) x 10−4. These results are obtained from (287 ± 3) million B{bar B} decays collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II B Factory at SLAC.