Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino

Details Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino

2004-01-13

arxiv.org/abs/hep-ph/0401094v3

Phys.Rev. D69 (2004) 094003

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX 4, formulas about distribution amplitudes and some misprints corrected, minor changes in numerical results, conclusions

Scientific paper

10.1103/PhysRevD.69.094003

The exclusive semileptonic heavy baryon decay \Lambda_b\to p l\bar\nu is investigated using light-cone sum rule method in both full QCD and HQET. The form factors describing the decay are calculated and used to predict the decay width and differential distribution. The total decay width obtained from full QCD is in agreement with the previous theoretical predictions while the HQET result are typically one order smaller. Both results are consistent with the experimental upper limit and can be compared to the refined experimental data in the future.

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