First Observation of the Rare Purely Baryonic Decay &ITB&IT0 -> &ITp&IT$(&ITp&IT)over-bar-$

Bonivento W.;Brundu D.;Dettori F.;Lai A.;Manca G.;Oldeman R.;Saitta B.;
2017-01-01

Abstract

The first observation of the decay of a B0 meson to a purely baryonic final state, B-0 -> p$(p)over-bar-$ , 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(B-0 -> p$(p)over-bar-$) = (1.25 +/- 0.27 +/- 0.18) x 10(-8), where the first uncertainty is statistical and the second systematic. The decay mode B-0 -> p$(p)over-bar-$ is the rarest decay of the B-0 meson observed to date. The decay B-s(0 )-> p$(p)over-bar-$ is also investigated. No signal is seen and the upper limit B(B-s(0) -> p$(p)over-bar-$) < 1.5 x 10(-8) at 90% confidence level is set on the branching fraction.
2017
Inglese
119
23
10
Esperti anonimi
internazionale
scientifica
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S. Albrecht J.; Alessio, F.; Alexander, M.; Alfonso, Albero; Ali, S.; Alkhazov, G.; Cartelle P ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
768
open
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