We search for the decay B-0->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We find no significant signal and set an upper limit of 1.1x10(-6) at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle alpha measured in B ->rho rho decays is decreased to 11 degrees at 68% C.L.

Limit on the B-0 ->rho(0)rho(0) branching fraction and implications for the Cabibbo-Kobayashi-Maskawa angle alpha / Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J.p., Poireau, V., Tisserand, V., Zghiche, A., GRAUGES POUS, E., Palano, A., Pompili, A., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Ofte, I., Stugu, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 94:(2005), p. 131801. [10.1103/PhysRevLett.94.131801]

Limit on the B-0 ->rho(0)rho(0) branching fraction and implications for the Cabibbo-Kobayashi-Maskawa angle alpha

DEL RE, Daniele;RAHATLOU, SHAHRAM;SARTI, ALESSIO;BELLINI, Fabio;CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;VOENA C;
2005

Abstract

We search for the decay B-0->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We find no significant signal and set an upper limit of 1.1x10(-6) at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle alpha measured in B ->rho rho decays is decreased to 11 degrees at 68% C.L.
2005
01 Pubblicazione su rivista::01a Articolo in rivista
Limit on the B-0 ->rho(0)rho(0) branching fraction and implications for the Cabibbo-Kobayashi-Maskawa angle alpha / Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J.p., Poireau, V., Tisserand, V., Zghiche, A., GRAUGES POUS, E., Palano, A., Pompili, A., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Ofte, I., Stugu, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 94:(2005), p. 131801. [10.1103/PhysRevLett.94.131801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/231036
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