SemileptonicB→D¯transition in a nuclear medium

Abstract

We study the semileptonic tree-level B →D transition in the framework of QCD sum rules in nuclear medium. In particular, we calculate the in-medium form factors entering the transition matrix elements defining this decay channel. It is found that the interactions of the participating particles with the medium lead to a considerable suppression in the branching ratio compared to the vacuum.

Mass and magnetic dipole moment of negative-parity heavy baryons with spin-3/2

“…. After lengthy calculations (for details see for instance [20,30]), the OPE side of the correlation function is obtained in terms of the selected structures as…”

“…The theoretical studies on the spectroscopic and electromagnetic decays of negative parity baryons have mainly been devoted to the radial excitations of the nucleons and other light baryons (see for instance [15][16][17][18][19][20] and references therein). In the heavy sector, some spectroscopic properties of negative parity spin-1/2 and spin-3/2 heavy baryons have been studied in [21][22][23][24][25].…”

“…where ϕ 2 (1 GeV ) = 0, w V γ = 3.8 ± 1.8, w A γ = −2.1 ± 1.0, κ = 0.2, κ + = 0, ζ 1 = 0.4, ζ 2 = 0.3, ζ + 1 = 0 and ζ + 2 = 0 [39]. After lengthy calculations (for details see for instance [20,30]), the OPE side of the correlation function is obtained in terms of the selected structures as…”