Evidence for the two-body charmless baryonic decay $ B^+\to pøverline\varLambda $статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 24 июня 2017 г.
Аннотация:A search for the rare two-body charmless baryonic decay B+→pΛ¯ is performed with pp collision data, corresponding to an integrated luminosity of 3fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. An excess of B+→pΛ¯ candidates with respect to background expectations is seen with a statistical significance of 4.1 standard deviations, and constitutes the first evidence for this decay. The branching fraction, measured using the B+→K0Sπ+ decay for normalisation, is
B(B+→pΛ¯)=(2.4+1.0−0.8±0.3)×10−7,
where the first uncertainty is statistical and the second systematic.