The first observation of the decay of a B0 meson to a purely baryonic final state, B0→p¯p, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0  fb−1. The branching fraction is determined to be B(B0→p¯p)=(1.25±0.27±0.18)×10−8, where the first uncertainty is statistical and the second systematic. The decay mode B0→p¯p is the rarest decay of the B0 meson observed to date. The decay B0s→p¯p is also investigated.No signal is seen and the upper limit B(B0s→p¯p)<1.5×10−8 at 90% confidence level is set on the branching fraction.

First Observation of the Rare Purely Baryonic Decay B0 →p p- / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:23(2017). [10.1103/PhysRevLett.119.232001]

First Observation of the Rare Purely Baryonic Decay B0 →p p-

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

Abstract

The first observation of the decay of a B0 meson to a purely baryonic final state, B0→p¯p, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0  fb−1. The branching fraction is determined to be B(B0→p¯p)=(1.25±0.27±0.18)×10−8, where the first uncertainty is statistical and the second systematic. The decay mode B0→p¯p is the rarest decay of the B0 meson observed to date. The decay B0s→p¯p is also investigated.No signal is seen and the upper limit B(B0s→p¯p)<1.5×10−8 at 90% confidence level is set on the branching fraction.
2017
hadronic decays, bottom mesons
01 Pubblicazione su rivista::01a Articolo in rivista
First Observation of the Rare Purely Baryonic Decay B0 →p p- / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:23(2017). [10.1103/PhysRevLett.119.232001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074664
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