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:

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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])

Study of Hadronic and Rare B Decays in BABAR.
Study of Hadronic and Rare B Decays in BABAR.

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Publisher:

Published: 2002

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We present results from BaBar experiment for the measurement of inclusive and exclusive branching fractions of B mesons into final states containing J/[psi], [psi](2S) and[chi]c. The contributions of CP even and odd amplitudes in the decay B[sup 0][yields] J/[psi]K*[sup 0] are determined from an angular analysis. We report the measurements of the branching ratios B[sup 0][yields] D*[sup+] D*[sup -] and D*[sup+] D*[sup -] K[sub S][sup 0], and the study of exclusive two-body and quasi-two-body charmless decays. The branching fraction of the decay B[sup 0][yields] K*[sup 0][gamma] has been determined and the corresponding CP asymmetry has been measured.

Rare Decays And Exotic States With BaBar
Rare Decays And Exotic States With BaBar

Author: S. H. Robertson

Publisher:

Published: 2006

Total Pages: 12

ISBN-13:

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Results from the BABAR experiment are presented for searches for several rare FCNC B and D meson decays, including the modes B{sup 0} {yields} {ell}{sup +}{ell}{sup -} and D{sup 0} {yields} {ell}{sup +}{ell}{sup -}, B {yields} ({rho}, {omega}){gamma} and B{sup +} {yields} (K, {pi}){sup +}{nu}{bar {nu}}. Limits on lepton flavor violation in neutrino-less {tau} decays are also discussed. Finally, results of BABAR searches for the strange pentaquark states {Theta}{sup +}(1540), {Xi}{sup --}(1860) and {Xi}{sup 0}(1860) are summarized.

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.