The Lambda_b lifetime in the light front quark model

Details The Lambda_b lifetime in the light front quark model The Lambda_b lifetime in the light front quark model

2000-03-31

arxiv.org/abs/hep-ph/0003325v3

JETP Lett. 71 (2000) 362-366

Physics

High Energy Physics

High Energy Physics - Phenomenology

final journal version to appear in JETP Letters

Scientific paper

10.1134/1.568354

The enhancement of the Lambda_b decay width relative to B decay one due to the difference of Fermi motion effects in Lambda_b and B is calculated in the light--front quark model with the simplifying assumption that Lambda_b consists of the heavy quark and light scalar diquark. In order to explain the large deviation from unity in the experimental result for tau(Lambda_b)/tau(B), it is necessary that diquark be light and the ratio of the squares of the Lambda_b and B wave functions at the origin be \le 1.

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