b -> s(d) gamma with a Vector-like Quark as Fourth-generation

 
 
Penulis: L. T. Handoko, T. Morozumi
We study the implications of a vector-like quark, especially a down-type vector-like quark in b -> s(d) gamma including the neutral Higgs in the calculation. After analyzing some possible constraints for the mixing, the contribution may be significant for the b -> d gamma, but not for the $b rightarrow s gamma$. We also find that the FCNC among ordinary quarks vanishes for a special form of down-type quark mass matrix.

Modern Physics Letter A10 (1995) 309, Err. Modern Physics Letter A10 (1995) 1733

arXiv:hep-ph/9409240

ISSN / ISBN / IBSN : 0217-7323

DOI: 10.1142/S021773239500034X

No. Arsip : LIPI-94008