More about on the short distance contribution to the B-c -> B-u*gamma decay

Download

index.pdf

Date

2000-05-04

Author

Alıyev, Tahmasıb
Savcı, Mustafa

Metadata

Show full item record

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

Item Usage Stats

185
views

69
downloads

We calculate the transition form factor for the B-c --> B-u*gamma decay taking into account only the short distance contribution, in framework of QCD sum rules method. We observe that the transition form factor predicted by the QCD sum rules method is approximately two times larger compared to the result predicted by the Isgur, Scora, Grinstein and Wise model.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/34273

Journal

PHYSICS LETTERS B

DOI

https://doi.org/10.1016/s0370-2693(00)00378-6

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Analysis of exclusive B-s -> D-s0(2317)l(v)over-bar(e) decay with QCD sum rules Alıyev, Tahmasıb; Savcı, Mustafa (American Physical Society (APS), 2006-06-01) The transition form factors of the semileptonic decay B-s into scalar D-s0(2317) meson is calculated in the framework of 3-point QCD sum rule. The branching ratio is found to be similar to 10(-3) for the B-s -> D-s0(2317)center dot(v) over bar (center dot)(center dot=e,mu) decay, and similar to 10(-4) for the B-s -> D-s0(2317)tau(v) over bar (tau) decay, respectively.
Scalar form factor of the nucleon and nucleon-scalar meson coupling constant in QCD Alıyev, Tahmasıb; Savcı, Mustafa (American Physical Society (APS), 2007-02-01) Scalar form factor of the nucleon is calculated in the framework of light-cone QCD sum rules, using the most general form of the baryon current. Using the result on scalar form factor of the nucleon, the nucleon-scalar sigma and a(0) meson coupling constants are estimated. Our results on these couplings are in good agreement with the prediction of the external-field QCD sum rules method.
Semileptonic B-c(-) -> D(*0)l nu transition in three-point QCD sum rules and heavy quark effective theory with gluon condensate corrections Ghahramany, N.; Khosravi, R.; Azizi, K. (American Physical Society (APS), 2008-12-01) Taking into account the gluon condensate contributions, the form factors of the semileptonic B-c(-) -> D(*0)l nu transition with l = tau, e are calculated in the framework of the three-point QCD sum rules. The heavy quark effective theory limit of the form factors is also computed. The relevant total decay width as well as the branching ratio are evaluated and compared with the predictions of the other nonperturbative approaches.
Noncommutative nonlinear sigma models and integrability Kürkcüoğlu, Seçkin (American Physical Society (APS), 2008-09-01) We first review the result that the noncommutative principal chiral model has an infinite tower of conserved currents and discuss the special case of the noncommutative CP1 model in some detail. Next, we focus our attention to a submodel of the CP1 model in the noncommutative spacetime A(theta)(R2+1). By extending a generalized zero-curvature representation to A(theta)(R2+1) we discuss its integrability and construct its infinitely many conserved currents. A supersymmetric principal chiral model with and wi...
Rare decay of the top t -> cgg in the standard model Eilam, G; Frank, M; Turan, İsmail (American Physical Society (APS), 2006-03-01) We calculate the one-loop flavor changing neutral current top quark decay t -> cgg in the standard model. We demonstrate that the rate for t -> cgg exceeds the rate for a single gluon emission t -> cg by about 2 orders of magnitude, while the rate for t -> cq (q) over bar q=u is slightly smaller than for t -> cg.

Citation Formats

T. Alıyev and M. Savcı, “More about on the short distance contribution to the B-c -> B-u*gamma decay,” PHYSICS LETTERS B, pp. 97–104, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34273.