SU(4) flavor symmetry breaking in D-meson couplings to light hadrons

C. E. Fontoura; J. Haidenbauer; G. Krein

doi:10.1140/epja/i2017-12289-2

EPJ

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2023 Impact factor 2.6

Hadrons and Nuclei

Open Access

Eur. Phys. J. A (2017) 53: 92
https://doi.org/10.1140/epja/i2017-12289-2

Letter

SU(4) flavor symmetry breaking in D-meson couplings to light hadrons

C. E. Fontoura¹^,2, J. Haidenbauer³ and G. Krein²^*

¹ Instituto Tecnológico da Aeronáutica, DCTA, 12228-900, São José dos Campos, SP, Brazil
² Instituto de Física Teórica, Universidade Estadual Paulista, 01140-070, São Paulo, SP, Brazil
³ Institute for Advanced Simulation, Institut für Kernphysik, and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany

^* e-mail: gkrein@ift.unesp.br

Received: 3 February 2017
Accepted: 20 April 2017
Published online: 16 May 2017

Abstract

The validity of SU(4)-flavor symmetry relations of couplings of charmed D-mesons to light mesons and baryons is examined with the use of ³ P ₀ quark-pair creation model and nonrelativistic quark-model wave functions. We focus on the three-meson couplings $\pi\pi\rho$ , $KK\rho$ and $DD\rho$ and baryon-baryon-meson couplings $NN\pi$ , $N\Lambda K$ and $N\Lambda_{c} D$ . It is found that SU(4)-flavor symmetry is broken at the level of 30% in the $DD\rho$ tree-meson couplings and 20% in the baryon-baryon-meson couplings. Consequences of these findings for DN cross sections and existence of bound states D-mesons in nuclei are discussed.