Article

# Exclusive rare decay b→ sγ of heavy b baryons

Physical review D: Particles and fields 03/2011; 83(5). DOI: 10.1103/PhysRevD.83.054007

Source: arXiv

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**ABSTRACT:**The Light-cone distribution amplitudes (LCDAs) of the $\Sigma^\pm$ baryons up to twist six are investigated on the basis of QCD conformal partial wave expansion approach. The calculations are carried out to the next-to-leading order of conformal spin accuracy. The nonperturbative parameters relevant to the LCDAs are determined in the framework of the QCD sum rule method. The explicit expressions of the LCDAs are given as the main results.Physical Review D 11/2013; 89(3). · 4.86 Impact Factor -
##### Article: Radiative decay in SM and BSM

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**ABSTRACT:**Using transition form factors calculated via light cone QCD sum rules in full theory, we comparatively analyze the rare radiative decay in the standard model (SM) and models with one or two universal extra dimensions, such as beyond the SM scenarios. We estimate the total decay width and branching ratio associated with this decay channel in the SM and compare the obtained results with those of scenarios with one or two universal extra dimensions. We discuss how the results of universal extra dimensional models approach the SM predictions when the compactification factor of extra dimension is increased.Journal of Physics G Nuclear and Particle Physics 08/2014; 41(9):095006. · 2.84 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**The improved light-cone distribution amplitudes (LCDAs) of the $\Lambda$ baryon are examined on the basis of the QCD conformal partial wave expansion approach. The calculations are carried out to the next-to-leading order of conformal spin accuracy with consideration of twist $6$. The next leading order conformal expansion coefficients are related to the nonperturbative parameters defined by the local three quark operator matrix elements with different Lorentz structures with a covariant derivative. The nonperturbative parameters are determined with the QCD sum rule method. The explicit expressions of the LCDAs are provided as the main results.European Physical Journal C 07/2014; 74(9). · 5.44 Impact Factor

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