The results of searches for and B (+) → J/ψ p π(+) decays are reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0 fb(−1) of pp collisions, collected with the LHCb detector. An excess with 2.8 σ significance is seen for the decay and an upper limit on the branching fraction is set at the 90 % confidence level: < 4.8 × 10(−6), which is the first such limit. No significant signals are seen for B (0) → J/ψ p and B (+) → J/ψ p π (+) decays, for which the corresponding limits are set: < 5.2 × 10(−7), which significantly improves the existing limit, and < 5.0 × 10(−7), which is the first limit on this branching fraction.
Searches for $ B_{(s)}^0\ \to {J \left/ {{\psi p}} \right.}\overline{p} $ and B + → J/ψ p $ \overline{p} $ π + decays
BALDINI, Wander;BOZZI, Concezio;FIORE, Marco;SAVRIE', Mauro;
2013
Abstract
The results of searches for and B (+) → J/ψ p π(+) decays are reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0 fb(−1) of pp collisions, collected with the LHCb detector. An excess with 2.8 σ significance is seen for the decay and an upper limit on the branching fraction is set at the 90 % confidence level: < 4.8 × 10(−6), which is the first such limit. No significant signals are seen for B (0) → J/ψ p and B (+) → J/ψ p π (+) decays, for which the corresponding limits are set: < 5.2 × 10(−7), which significantly improves the existing limit, and < 5.0 × 10(−7), which is the first limit on this branching fraction.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.