Search for structure in the B0sπ± invariant mass spectrum.
Physical Review Letters American Physical Society 117:15 (2016) 152003
Abstract:
The B0sπ± invariant mass distribution is investigated in order to search for possible exotic meson states. The analysis is based on a data sample recorded with the LHCb detector corresponding to 3fb^-1 of pp collision data at √s=7 and 8 TeV. No significant excess is found, and upper limits are set on the production rate of the claimed X(5568) state within the LHCb acceptance. Upper limits are also set as a function of the mass and width of a possible exotic meson decaying to the B0sπ± final state. The same limits also apply to a possible exotic meson decaying through the chain B*0sπ±, B*0s → B0sγ where the photon is excluded from the reconstructed decays.Measurement of the ratio of branching fractions B(B+c→J/ψK+)/B(B+c→J/ψπ+)
Journal of High Energy Physics Springer 2016:9 (2016) 153
Abstract:
The ratio of branching fractions RK/π ≡ ℬ(Bc+ → J/ψK+)/ℬ(Bc+ → J/ψπ+) is measured with pp collision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. It is found to be RK/π = 0.079 ± 0.007 ± 0.003, where the first uncertainty is statistical and the second is systematic. This measurement is consistent with the previous LHCb result, while the uncertainties are significantly reduced.Measurement of CP observables in B ± → DK ± and B ± → Dπ ± with two- and four-body D decays
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 760 (2016) 117-131
Abstract:
© 2016 The Author(s) Measurements of CP observables in B ± →DK ± and B ± →Dπ ± decays are presented where the D meson is reconstructed in the final states K ± π ∓ , π ± K ∓ , K + K − , π + π − , K ± π ∓ π + π − , π ± K ∓ π + π − and π + π − π + π − . This analysis uses a sample of charged B mesons from pp collisions collected by the LHCb experiment in 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb −1 . Various CP-violating effects are reported and together these measurements provide important input for the determination of the unitarity triangle angle γ. The analysis of the four-pion D decay mode is the first of its kind.Erratum to: Measurements of prompt charm production cross-sections in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
Journal of High Energy Physics Springer Verlag 2016:9 (2016)
First study of the CP-violating phase and decay-width difference in Bs0 → ψ(2S)ϕ decays
Physics Letters B Elsevier 762 (2016) 253-262