Flavor-changing neutral currents transition of the Sigma(Q) to nucleon in full QCD and heavy quark effective theory
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, vol.37, no.8, 2010 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 37 Issue: 8
- Publication Date: 2010
- Doi Number: 10.1088/0954-3899/37/8/085002
- Journal Name: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Open Archive Collection: AVESIS Open Access Collection
- Kocaeli University Affiliated: No
Abstract
The loop-level flavor-changing neutral currents transitions of the Sigma(b) -> nl(+)l(-) and Sigma(c) -> pl(+)l(-) are investigated in full QCD and heavy quark effective theory in the light cone QCD sum rules approach. Using the most general form of the interpolating current for Sigma(Q), Q = b or c, as members of the recently discovered sextet heavy baryons with spin 1/2 and containing one heavy quark, the transition form factors are calculated using two sets of input parameters entering the nucleon distribution amplitudes. The obtained results are used to estimate the decay rates of the corresponding transitions. Since such a type of transitions occurs at the loop level in the standard model (SM), they can be considered as good candidates to search for the new physics effects beyond the SM.