Decays of B0 and B0s mesons to the charmless baryonic final states p¯ph+h'−, where h and h′ each denote a kaon or a pion, are searched for using the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3  fb−1. Four-body charmless baryonic B0s decays are observed for the first time. The decays B0s→p¯pK+K−, B0s→p¯pK±π∓, B0→p¯pK±π∓ and B0→p¯pπ+π− are observed with a significance greater than 5 standard deviations; evidence at 4.1 standard deviations is found for the B0→p¯pK+K− decay and an upper limit is set on the branching fraction for B0s→p¯pπ+π−. Branching fractions in the kinematic region m(p¯p)<2850  MeV/c2 are measured relative to the B0→J/ψ(→p¯p)K∗(892)0 channel.

Observation of charmless baryonic decays B (s)0 →p p - h+h′- / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 96:5(2017). [10.1103/PhysRevD.96.051103]

Observation of charmless baryonic decays B (s)0 →p p - h+h′-

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

Abstract

Decays of B0 and B0s mesons to the charmless baryonic final states p¯ph+h'−, where h and h′ each denote a kaon or a pion, are searched for using the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3  fb−1. Four-body charmless baryonic B0s decays are observed for the first time. The decays B0s→p¯pK+K−, B0s→p¯pK±π∓, B0→p¯pK±π∓ and B0→p¯pπ+π− are observed with a significance greater than 5 standard deviations; evidence at 4.1 standard deviations is found for the B0→p¯pK+K− decay and an upper limit is set on the branching fraction for B0s→p¯pπ+π−. Branching fractions in the kinematic region m(p¯p)<2850  MeV/c2 are measured relative to the B0→J/ψ(→p¯p)K∗(892)0 channel.
2017
Branching fraction, Hadron-Hadron scattering (experiments), QCD
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of charmless baryonic decays B (s)0 →p p - h+h′- / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 96:5(2017). [10.1103/PhysRevD.96.051103]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074653
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