QCD sum rule approach to the new mesons and the gDsJ DK coupling constant

AUTOR(ES)

Nielsen, Marina

FONTE

Braz. J. Phys.

DATA DE PUBLICAÇÃO

2007-06

RESUMO

We use diquark-antidiquark currents to investigate the masses and partial decay widths of the recently observed mesons D+sJ(2317), D*0(0)(2308) and X(3872), considered as four-quark states, in a QCD sum rule approach. In particular we investigate the coupling constant gDsJ DK. We found that the gDsJ DK obtained in this four-quark scenario is smaller than the coupling constant obtained when D+sJ(2317) is considered as a conventional cs state.

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