Rho decay widths of excited heavy mesons from light-cone QCD sum rules in the leading order of HQET

Abstract

The couplings and decay widths of the proceses (1^+,2^+)->(0^-,1^-)+rho are studied with ligh-cone QCD sum rules in the leading order of heavy quark effective theory. These processes are employed to estimate the two pion transition widths of the (1^+,2^+) doublet through the low mass tail of the rho resonance. Our calculation shows that the two pion decay widths are much smaller than the single pion decay widths. However, B_1 and B_2^* mesons should also have significant two pion decay widths around 1.5 MeV.

Several references and a paragraph discussing the choice of the parameter $u_0$ are added. Final version to appear in Phys. Rev. D

References in corpus (4)

• Operator product expansion in static-quark effective field theory: large perturbative correction
• Order (1/m_Q) Corrections to Masses of Excited Heavy Mesons From QCD Sum Rules
• Decay widths of B_1 and B^*_2 up to the order of O(1/m_Q) in HQET
• Couplings of pions with heavy baryons from light-cone QCD sum rules in the leading order of HQET

Cited by in corpus (11)

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