<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mi>D</mml:mi><mml:mo>∗</mml:mo></mml:msup><mml:msub><mml:mi>D</mml:mi><mml:mi>s</mml:mi></mml:msub><mml:mi>K</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:msubsup><mml:mi>D</mml:mi><mml:mi>s</mml:mi><mml:mo>∗</mml:mo></mml:msubsup><mml:mi>D</mml:mi><mml:mi>K</mml:mi></mml:math> vertices in a QCD sum rule approach

200648 citationsJournal Articlehybrid Open Access

Authors

Mirian E. Bracco · Universidade do Estado do Rio de Janeiro

A. S. Cerqueira · Universidade do Estado do Rio de Janeiro

M. Chiapparini · Universidade do Estado do Rio de Janeiro

A. Lozéa · Universidade do Estado do Rio de Janeiro

Abstract

We calculate the strong form factors and coupling constants of D∗DsK and Ds∗DK vertices using the QCD sum rules technique. In each case we have considered two different cases for the off-shell particle in the vertex: the lightest meson and one of the heavy mesons. The method gives the same coupling constant for each vertex. When the results for different vertices are compared, they show that the SU(4) symmetry is broken by around 40%.

Topics & Keywords

Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions High-Energy Particle Collisions Research

Publication Details

Published in: Physics Letters B

Volume 641, Issue 3-4, pp. 286-293

DOI: 10.1016/j.physletb.2006.08.058

Field-Weighted Citation Impact: 3.00

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