Precise measurements of the properties of the B-1(5721)(0,+) and B-2*(5747)(0,+) states and observation of B-+,B-0 pi(-,+) mass structures

Invariant mass distributions of B+pi- and B0pi+ combinations are investigated in order to study excited B mesons. The analysis is based on a data sample corresponding to 3.0 fb-1 of pp collision data, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. Precise measurements of the masses and widths of the B_1(5721)^(0,+) and B_2*(5747)^(0,+) states are reported. Clear enhancements, particularly prominent at high pion transverse momentum, are seen over background in the mass range 5850--6000 MeV in both B+pi- and B0pi+ combinations. The structures are consistent with the presence of four excited B mesons, labelled B_J(5840)^(0,+) and B_J(5960)^(0,+), whose masses and widths are obtained under different hypotheses for their quantum numbers.Comment: 29 pages, 5 Figures, 8 Table

Spectroscopy and decay properties of B and B

A study of the spectroscopy and decay properties of the B and \ensuremath B_s mesons is carried out within the framework of the phenomenological quark-antiquark potential model using the Hydrogenic and the Gaussian wave function. The spin-hyperfine, spin-orbit and the tensor interactions are employed to obtain the pseudoscalar and vector meson masses incorporating the effect of mixing. The decay constants \ensuremath (f_{P/V}) are computed using the wave function at the origin. The leptonic branching fractions, electromagnetic transition rates and mixing parameters of the B and \ensuremath B_{s} are also calculated in this scheme. Our predictions are in good agreement with the experimental results as well as the lattice and other theoretical models

Masses and electromagnetic transitions of the B

The mass spectra and decay properties of the $B_{c}(c\bar{b})$ meson are investigated in the framework of the phenomenological quark anti-quark potential (Coulomb plus power) model consisting of relativistic corrections to the kinetic-energy term as well as relativistic corrections to the quark antiquark potential at $O(1/m)$ using the Gaussian wave function. The spin-spin, spin-orbit and tensor interactions are employed to obtain the pseudoscalar and vector meson masses incorporating the effect of mixing. The decay constants $(f_{P/V})$ with and without QCD correction are computed using the wave function at the origin. The electromagnetic transition rates are also calculated in this scheme. Our predictions for the Bc meson are in good agreement with experimental results as well as other theoretical models