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