Rare B -> l(+)l(-)gamma decay and new physics effects

Using the most general, model independent form of the effective Hamiltonian rare decays B --> l(+)l(-)gamma (l = mu, tau) are studied. The sensitivity of the photon energy distribution and branching ratio to the new Wilson coefficients is investigated.


T violation in Lambda b ->Lambda l(+)l(-) decay beyond standard model
Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (2002-08-29)
Using the most general, model independent form of effective Hamiltonian, the transverse polarization PT of A in Ab Al(+)l(-) decay is studied. It is observed that the averaged (PT) is very sensitive to the existence of new physics and can attain large values, which can be measured at future colliders.
Fourth generation effects in rare exclusive B -> K*l(+)l(-) decay
Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (2000-10-02)
Influence of the fourth generation, if ever exists, on the experimentally measurable quantities such as invariant dilepton mass distribution, lepton forward-backward asymmetry, and the ratio Gamma(L)/Gamma(T) of the decay widths when K* meson is longitudinally and transversally polarized, is studied. Using the experimental results on the branching ratios for the B --> X(s)gamma and semileptonic B --> X(c)l (v) over bar decays, the two possible solutions of the 4 x 4 Cabibbo-Kobayashi-Maskawa factor Vt'sVt'b...
Interference effects in the decay phi ->pi(0)pi(0)gamma and the coupling constant g(phi sigma gamma)
Gokalp, A; Yılmaz, Osman (2001-09-01)
We study the radiative decay phi --> pi (0)pi (0)gamma within the framework, of a phenomenological approach in which the contributions of sigma mesons, rho mesons, and f(0) mesons are considered. We analyze the interference effects between different contributions and, utilizing the experimental branching ratio for this decay, we estimate the coupling constant g(phi sigma gamma).
Heavy chi(Q) (2) tensor mesons in QCD
Alıyev, Tahmasıb; Savcı, Mustafa (Elsevier BV, 2010-06-14)
The masses and decay constants of the ground state heavy chi(Q2) (Q = b, c) tensor mesons are calculated in the framework of the QCD sum rules approach. The obtained results on the masses are in good consistency with the experimental values. Our predictions on the decay constants can be verified in the future experiments.
Coupling constants g alpha(0)omega gamma and g alpha(0)p gamma as derived from QCD sum rules
Gokalp, A; Yılmaz, Osman (2001-11-01)
We consider the two point correlation function of a scalar current in the QCD sum rule approach to estimate the overlap amplitude of the a(o)-meson. We then employ QCD sum rules to calculate the coupling constants g(omegaaogamma) and g(rhoaogamma) by studying the three point a(o)omegagamma- and a(o)rhogamma-correlation functions.
Citation Formats
T. Alıyev, A. Özpineci, and M. Savcı, “Rare B -> l(+)l(-)gamma decay and new physics effects,” PHYSICS LETTERS B, pp. 69–77, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35123.