A search for the rare two-body charmless baryonic decay B+→pΛ is performed with pp collision data, corresponding to an integrated luminosity of 3 fb−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 + → K S 0 π + decay for normalisation, is (B+→pΛ)=(2.4+1.0−0.8±0.3)×10−7, where the first uncertainty is statistical and the second systematic.

Evidence for the two-body charmless baryonic decay B+→ pΛ¯ / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P.A., Alves, A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2017:4(2017). [10.1007/JHEP04(2017)162]

Evidence for the two-body charmless baryonic decay B+→ pΛ¯

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2017

Abstract

A search for the rare two-body charmless baryonic decay B+→pΛ is performed with pp collision data, corresponding to an integrated luminosity of 3 fb−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 + → K S 0 π + decay for normalisation, is (B+→pΛ)=(2.4+1.0−0.8±0.3)×10−7, where the first uncertainty is statistical and the second systematic.
2017
B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Evidence for the two-body charmless baryonic decay B+→ pΛ¯ / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P.A., Alves, A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2017:4(2017). [10.1007/JHEP04(2017)162]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074615
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