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arXiv · hep-ph/0003325

The Lambda_b lifetime in the light front quark model

P. Yu. Kulikov·I. M. Narodetskii·A. I. Onischenko
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Abstract

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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P. Yu. Kulikov, I. M. Narodetskii, A. I. Onischenko. 2000-04-25. The Lambda_b lifetime in the light front quark model. https://doi.org/10.1134/1.568354

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