Spectra and decay constants of $B_c$-like and $B_0^⁎$ mesons in QCD

Stephan Narison (1)

1 LUPM - Laboratoire Univers et Particules de Montpellier

Using the existing state of art of the QCD expressions of the two-point correlators into the Inverse Laplace sum rules (LSR) within stability criteria, we present a first analysis of the spectra and decay constants of Bc -like scalar (0++) and axial-vector (1++) mesons and revisit the ones of the Bc⁎(1−−) vector meson. Improved predictions are obtained by combining these LSR results with some mass-splittings from Heavy Quark Symmetry (HQS). We complete the analysis by revisiting the B0⁎(0++) mass which might be likely identified with the BJ⁎(5732) experimental candidate. The results for the spectra collected in Table 2 are compared with some recent lattice and potential models ones. New estimates of the decay constants are given in Table 3.

Mots clés: 12.38.Lg; 14.65.Dw; 14.65.Fy; QCD spectral sum rules; Perturbative and Non-Pertubative calculations; Hadron and Quark masses; Gluon condensates (1155Hx; 1320-Gd; 1470Dj); Perturbative and non-pertubative calculations; Gluon condensates; heavy quark: symmetry; sum rule: Laplace; quantum chromodynamics; B/c: decay; correlation function; potential model; lattice field theory; axial-vector meson; scalar meson; B*(5320)

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]; Physique des Hautes Energies - Expérience [hep-ex]; Physique des Hautes Energies - Réseau [hep-lat]; Physique Nucléaire Théorique [nucl-th]

Stephan Narison. Spectra and decay constants of $B_c$-like and $B_0^⁎$ mesons in QCD. Phys.Lett.B, 2020, 807, pp.135522. ⟨10.1016/j.physletb.2020.135522⟩. ⟨hal-02557736⟩