We report on a search for the rare decay (B) over bar (0)-> D(*0)gamma, which in the standard model is dominated by W-exchange. The analysis is based on a data sample comprising 87.8x10(6) B (B) over bar 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 2.5x10(-5) at the 90% confidence level is obtained.
Search for the rare decay (B)over-bar(0)-> D-*0 gamma
ANDREOTTI, Mirco;CALABRESE, Roberto;CIBINETTO, Gianluigi;LUPPI, Eleonora;NEGRINI, Matteo;
2005
Abstract
We report on a search for the rare decay (B) over bar (0)-> D(*0)gamma, which in the standard model is dominated by W-exchange. The analysis is based on a data sample comprising 87.8x10(6) B (B) over bar 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 2.5x10(-5) at the 90% confidence level is obtained.File in questo prodotto:
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