Radiative decay of the X(3872) as a mixed molecule-charmonium state in effective field theory

Cincioglu, E.
Özpineci, Altuğ
Assuming that X(3872) is a mixture between 2P charmonium and (D) over barD* molecular states with J(PC) = 1(++), an analysis of X(3872) radiative decays into J/psi gamma and psi(2S)gamma is presented. The modification of the radiative branching ratio due to possible constructive or destructive interferences between the meson-loop and the short-distance contact term, which is modeled by a charm quark loop, is shown. The model predictions are shown to be compatible with the experimentally determined ratio of the mentioned branching fractions for a wide range of the X(3872) charmonium content. In the case of the destructive interference, a strong restriction on the charmonium admixture is found. (C) 2019 Published by Elsevier B.V.


Radiative decays of decuplet to octet baryons in light cone QCD
Alıyev, Tahmasıb; Özpineci, Altuğ (Elsevier BV, 2006-01-02)
The radiative decays of decuplet to octet baryons are analyzed within the light cone QCD sum rules framework. The electromagnetic transition form factors for these decays are calculated at q(2) = 0 up to twist-4 accuracy for photon wave functions and including first order strange quark mass corrections. A comparison of our results with predictions of lattice theory and existing experimental data is presented. (c) 2005 Published by Elsevier B.V.
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Berkdemir, C; Berkdemir, A; Sever, Ramazan (American Physical Society (APS), 2005-08-01)
The bound state energy eigenvalues and the corresponding eigenfunctions of the generalized Woods-Saxon potential are obtained by means of Nikiforov-Uvarov (NU) method. Certain bound states of the Schrodinger equation for the potential are calculated analytically and the wave functions are found in terms of the Jacobi polynomials. It is shown that the results are in good agreement with those obtained previously.
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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 gV sigma gamma coupling constants in hadron electrodynamics
Rekalo, MP; Tomasi-Gustafsson, E (Elsevier BV, 2003-09-22)
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(Q)Lambda(Q)pi coupling constant in light cone QCD sum rules
Azizi, K.; Bayar, M.; Özpineci, Altuğ (American Physical Society (APS), 2009-03-01)
The strong coupling constants g(Sigma Q)Lambda(Q)pi (Q=b and c) are studied in the framework of the light cone QCD sum rules using the most general form of the baryonic currents. The predicted coupling constants are used to estimate the decay widths for the Sigma(Q)->Lambda(Q)pi decays which are compared with the predictions of the other approaches and existing experimental data.
Citation Formats
E. Cincioglu and A. Özpineci, “Radiative decay of the X(3872) as a mixed molecule-charmonium state in effective field theory,” PHYSICS LETTERS B, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48716.