The flavour changing neutral current decay b --> s gamma has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b (b) over bar events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching ratio is measured to be (3.11 +/- 0.80(stat) +/- 0.72(syst)) x 10(-4), consistent with the Standard Model expectation via penguin processes.

R., B., D., B., D., D., P., G., C., G., J. P., L., et al. (1998). A measurement of the inclusive b -> s gamma branching ratio. PHYSICS LETTERS. SECTION B, 429(1-2), 169-187 [10.1016/S0370-2693(98)00404-3].

A measurement of the inclusive b -> s gamma branching ratio

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1998-01-01

Abstract

The flavour changing neutral current decay b --> s gamma has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b (b) over bar events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching ratio is measured to be (3.11 +/- 0.80(stat) +/- 0.72(syst)) x 10(-4), consistent with the Standard Model expectation via penguin processes.
1998
R., B., D., B., D., D., P., G., C., G., J. P., L., et al. (1998). A measurement of the inclusive b -> s gamma branching ratio. PHYSICS LETTERS. SECTION B, 429(1-2), 169-187 [10.1016/S0370-2693(98)00404-3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37777
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