B_c -> l nu gamma decay in light cone QCD

The radiative B_c -> l nu gamma decay is investigated in the Standard Model in framework of the light cone QCD. The transition form factors and decay width are calculated. A comparison of light cone QCD and constituent quark model predictions on these quantities is presented.Comment: 11 pages, 3 figures, LaTeX formatte

Magnetic moments of negative-parity baryons in QCD

Using the most general form of the interpolating current for the octet baryons, the magnetic moments of the negative-parity baryons are calculated within the light-cone sum rules. The contributions coming from diagonal transitions of the positive-parity baryons, and also from non-diagonal transition between positive and negative-parity baryons are eliminated by considering the combinations of different sum rules corresponding to the different Lorentz structures. A comparison of our results on magnetic moments of the negative-parity baryons with the other approaches existing in literature is presented.Comment: 23 pages, No figures, LaTeX formatte

Magnetic moments of JP=32−J^P = {3\over 2}^- baryons in QCD

The magnetic moments of the low lying, negative parity, spin-3/2 baryons are calculated within the light cone QCD sum rules method. The contributions coming from the positive parity, spin-3/2 baryons, as well as from the positive and negative parity spin-1/2 baryons are eliminated by constructing combinations of various invariant amplitudes corresponding to the coefficients of the different Lorentz structures.Comment: 12 pages, 1 figure, LaTeX formatte

Penguin induced (B -> eta) transition form factor in light cone QCD

We calculate the penguin form factor for the (B -> eta l^+ l^-) decay. This form factor is calculated in light cone QCD sum rules, including contributions from wave functions up to twist-4, as well as mass corrections of the light (eta) meson.Comment: 9 pages, 2 figures, LaTeX formatte

Octet negative parity to octet positive parity electromagnetic transitions in light cone QCD

Light cone QCD sum rules for the electromagnetic transition form factors among positive and negative parity octet baryons are derived. The unwanted contributions of the diagonal transitions among positive parity octet baryons are eliminated by combining the sum rules derived from different Lorentz structures. The $Q^2$ dependence for the transversal and longitudinal helicity amplitudes are studied.Comment: 27 pages, 10 figures, LaTeX formatte

The Strong g_B(**)BPi Coupling Constant in full QCD

To leading order in alpha_s, the leading and non-leading 1/m_b corrections to the excited g_B^(**) meson coupling g_B^(**)BPi is calculated in the framework of QCD spectral moment sum rules in the full theory. Our prediction is in good agreement=20 with the light-cone QCD sum rule result.Comment: 7 pages,LaTeX formatte

Octet baryon magnetic moments in light cone QCD sum rules

Octet baryon magnetic moments are calculated in framework of the light cone QCD sum rules. The analysis is carried for the general form of the interpolating currents for octet baryons. A comparison of our results on the magnetic moments of octet baryons with the predictions of other approaches and experimental data is presented.Comment: 20 pages, 10 figures, 1 Table, LaTeX formatte