Four candidates for charmless hadronic B decay are observed in a data sample of four million hadronic Z decays recorded by the ALEPH detector at LEP. The probability that these events come from background sources is estimated to be less than 10(-6). The average branching of weakly decaying B hadrons (a mixture of B-d(0), B-s(0) and Lambda(b) weighted by their production cross sections and lifetimes, here denoted B) into two long-lived charged hadrons (pions, kaons or protons) is measured to be Br(B-->h(+)h(-))=(1.7 + (-0.7)(+1.0) +/- 0.2)x10(-5). The relative branching fraction Br(B-d(s)(0)-->pi(+)pi(-)(K-))/Br(B-d(s)(0)-->h(+)h(-)) is measured to be 1.0 +(-0.3+0.0) + (-0.1+0.0). In addition, branching ratio upper limits are obtained for a variety of exclusive charmless hadronic two-body decays of B hadrons.

D., B., I., D., D., D., P., G., C., G., J. P., L., et al. (1996). Observation of charmless hadronic B decays. PHYSICS LETTERS. SECTION B, 384(1-4), 471-480 [10.1016/0370-2693(96)00929-X].

Observation of charmless hadronic B decays

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1996-01-01

Abstract

Four candidates for charmless hadronic B decay are observed in a data sample of four million hadronic Z decays recorded by the ALEPH detector at LEP. The probability that these events come from background sources is estimated to be less than 10(-6). The average branching of weakly decaying B hadrons (a mixture of B-d(0), B-s(0) and Lambda(b) weighted by their production cross sections and lifetimes, here denoted B) into two long-lived charged hadrons (pions, kaons or protons) is measured to be Br(B-->h(+)h(-))=(1.7 + (-0.7)(+1.0) +/- 0.2)x10(-5). The relative branching fraction Br(B-d(s)(0)-->pi(+)pi(-)(K-))/Br(B-d(s)(0)-->h(+)h(-)) is measured to be 1.0 +(-0.3+0.0) + (-0.1+0.0). In addition, branching ratio upper limits are obtained for a variety of exclusive charmless hadronic two-body decays of B hadrons.
1996
D., B., I., D., D., D., P., G., C., G., J. P., L., et al. (1996). Observation of charmless hadronic B decays. PHYSICS LETTERS. SECTION B, 384(1-4), 471-480 [10.1016/0370-2693(96)00929-X].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38722
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