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Paper IPM / Physic / 15193

School of Physics

Title:

Semileptonic Λ_b→ Λ_clν Transition in Full QCD

Author(s):

1 .	K. Azizi
2 .	J.Y. Sungu

Status:

Published

Journal:

Phys. Rev. D

No.:

Vol.:

Year:

2018

Pages:

074007

Supported by:

IPM

Abstract:

The tree-level b→cl―ν_l based hadronic transitions have been on the focus of much attention since recording significant deviations of the experimental data, on the ratios of the branching fractions in τ and e−μ channels of the semileptonic B → D transition, from the SM predictions by BaBar Collaboration in 2012. It can be of great importance to look whether similar discrepancies take place in the semileptonic baryonic Λ_b→Λ_cl―ν_l decay channel or not. In this accordance we estimate the decay width as well as the ratios of the branching fractions in τ and e−μ channels of this baryonic transition by calculating the form factors, entering the amplitude of this transition as the main inputs, in the framework of QCD sum rules in full theory. We compare the obtained results with the predictions of other theoretical studies. Our results may be compared with the corresponding future experimental data to look for possible deviations of data from the SM predictions.

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