Decays of the form B0(s)→J/ψK0Sh+h(′)− (h(′)=K,π) are searched for in proton-proton collision data corresponding to an integrated luminosity of 1.0fb−1 recorded with the LHCb detector. The first observation of the B0s→J/ψK0SK±π∓ decay is reported, with significance in excess of 10 standard deviations. The B0→J/ψK0SK+K− decay is also observed for the first time. The branching fraction of B0→J/ψK0Sπ+π− is determined, to significantly better precision than previous measurements, using B0→J/ψK0S as a normalisation channel. Branching fractions and upper limits of the other B0(s)→J/ψK0Sh+h(′)− modes are determined relative to that of the B0→J/ψK0Sπ+π− decay.
Observation of the B s 0 → J/ψK S 0 K ± π ∓ decay
ANDREOTTI, Mirco;BALDINI, Wander;BOZZI, Concezio;CALABRESE, Roberto;CORVO, Marco;FIORE, Marco;FIORINI, Massimiliano;LUPPI, Eleonora;MANZALI, Matteo;SAVRIE', Mauro;TELLARINI, Giulia;TOMASSETTI, Luca;
2014
Abstract
Decays of the form B0(s)→J/ψK0Sh+h(′)− (h(′)=K,π) are searched for in proton-proton collision data corresponding to an integrated luminosity of 1.0fb−1 recorded with the LHCb detector. The first observation of the B0s→J/ψK0SK±π∓ decay is reported, with significance in excess of 10 standard deviations. The B0→J/ψK0SK+K− decay is also observed for the first time. The branching fraction of B0→J/ψK0Sπ+π− is determined, to significantly better precision than previous measurements, using B0→J/ψK0S as a normalisation channel. Branching fractions and upper limits of the other B0(s)→J/ψK0Sh+h(′)− modes are determined relative to that of the B0→J/ψK0Sπ+π− decay.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
