Observation of the decay B(c)(+) → B(s)(0)π+.

Journal article

The result of a search for the decay B(c)(+) → B(s)(0) π+ is presented, using the B(s)(0) → D(s)(-)π+ and B(s)(0) → J/ψ Ø channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb(-1) taken at a center-of-mass energy of 7 TeV, and 2 fb(-1) taken at 8 TeV. The decay B(c)(+) → B(s)(0)π+ is observed with significance in excess of 5 standard deviations independently in both decay channels. The measured product of the ratio of cross sections and branching fraction is [σ(B(c)(+))/σ(B(s)(0))] × B(B(c)(+)→ B(s)(0)π+) = [2.37 ± 0.31 (stat)± 0.11 (syst)(-0.13)(+0.17)(τ(B)(c)(+)))] × 10(-3), in the pseudorapidity range 2<η(B)<5, where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the B(c)(+) lifetime. This is the first observation of a B meson decaying to another B meson via the weak interaction.

Authors: Aaij, R; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 111
• Issue: 18
• Pages: 181801
• Publication date: 2013-11-01
• DOI: 10.1103/physrevlett.111.181801
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: LHCb Collaboration