The gV sigma gamma coupling constants in hadron electrodynamics

Download

index.pdf

Date

2003-09-22

Author

Rekalo, MP
Tomasi-Gustafsson, E

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

215
views

62
downloads

Recent measurements of the branching ratios for the decays omega --> pi(0) pi(0)gamma and rho(0) --> pi(0)pi(0)gamma lead to coupling constants of the Vsigmagamma interaction (V is a vector meson) one order of magnitude smaller than previously assumed to describe the threshold cross section of gamma + p --> p + rho(0) and the HERMES effect. The new g(Vsigmagamma)(2) a couplings are in contradiction with the predictions of the QCD sum rules, but are in agreement with vector meson dominance estimation of the sigma --> gammagamma width.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/65623

Journal

NUCLEAR PHYSICS A

DOI

https://doi.org/10.1016/s0375-9474(03)01605-1

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

The mass and residues of radially and orbitally excited doubly heavy baryons in QCD Alıyev, Tahmasıb; Bilmiş, Selçuk (Elsevier BV, 2019-04-01) The mass and residues of the first radial and orbital excitations of J = 1/2 baryons containing two heavy quarks (b or c) are calculated within the QCD sum rules method. In calculations, the general forms of the interpolating currents with symmetric and anti-symmetric forms with respect to the exchange of heavy quarks have been used. Our results on the spectroscopic parameters of doubly heavy baryons are compared with the predictions of other theoretical approaches.
General analysis of polarization phenomena in inclusive and semi-inclusive radiative decays of B mesons Pak, Namık Kemal; Rekalo, MP; Yilmaz, T (IOP Publishing, 2000-07-01) Polarization characteristics of photons produced in inclusive and semi-inclusive radiative decays of B mesons, B --> gamma + X-s, B --> gamma + h + X', are described in a general model-independent framework, using the structure function formalism.
The semileptonic B to K-1(1270,1400) decays in QCD sum rules Dag, H.; Özpineci, Altuğ; Zeyrek, Mehmet Tevfik (IOP Publishing, 2011-01-01) We analyze the semileptonic rare decays of the B meson to K-1(1270) and K-1(1400) axial vector mesons. The B -> K-1(1270, 1400)l(+)l(-) decays are significant flavor-changing neutral current decays of the B meson. These decays are sensitive to the new physics beyond the standard model (SM), since these processes are forbidden at tree level at SM. These decays occurring at the quark level via b -> sl(+)l(-) transition also provide new opportunities for calculating the CKM matrix elements V-bt and V-ts. In th...
Vector meson-baryon strong coupling constants in light cone QCD sum rules Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (American Physical Society (APS), 2009-07-01) Using the most general form of the interpolating current of the baryons, the strong coupling constants of the light vector mesons with the octet baryons are calculated within the light cone QCD sum rules. The SU(3)(f) symmetry breaking effects are taken into account in the calculations. It is shown that each of the electric and magnetic coupling constants can be described in terms of three universal functions. A detailed comparison of the results of this work on aforementioned couplings with the existing th...
Thermodynamics of Lifshitz black holes Devecioglu, Deniz Olgu; Sarıoğlu, Bahtiyar Özgür (American Physical Society (APS), 2011-06-23) We apply the recently extended conserved Killing charge definition of Abbott-Deser-Tekin formalism to compute, for the first time, the energies of analytic Lifshitz black holes in higher dimensions. We then calculate the temperature and the entropy of this large family of solutions, and study and discuss the first law of black hole thermodynamics. Along the way we also identify the possible critical points of the relevant quadratic curvature gravity theories. Separately, we also apply the generalized Killin...

Citation Formats

M. Rekalo and E. Tomasi-Gustafsson, “The gV sigma gamma coupling constants in hadron electrodynamics,” NUCLEAR PHYSICS A, pp. 116–126, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65623.