We present a study of the decay B-0-->pi(0)pi(0) based on a sample of 124x10(6) B (B) over bar pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B-0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B-0 and (B) over bar (0) decays.

Observation of a significant excess of pi(0)pi(0) events in B meson decays / Aubert, B., Barate, R., Boutigny, D., Gaillard, J.m., Hicheur, A., Karyotakis, Y., Lees, J.p., Robbe, P., Tisserand, V., Zghiche, A., 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. - 91:(2003). [10.1103/physrevlett.91.241801]

Observation of a significant excess of pi(0)pi(0) events in B meson decays

DEL RE, Daniele;RAHATLOU, SHAHRAM;SARTI, ALESSIO;BELLINI, Fabio;CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;VOENA C;
2003

Abstract

We present a study of the decay B-0-->pi(0)pi(0) based on a sample of 124x10(6) B (B) over bar pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B-0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B-0 and (B) over bar (0) decays.
2003
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of a significant excess of pi(0)pi(0) events in B meson decays / Aubert, B., Barate, R., Boutigny, D., Gaillard, J.m., Hicheur, A., Karyotakis, Y., Lees, J.p., Robbe, P., Tisserand, V., Zghiche, A., 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. - 91:(2003). [10.1103/physrevlett.91.241801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/248191
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