Qcd enhancement of b → sγ decay for a heavy top quark
1991; Elsevier BV; Volume: 365; Issue: 2 Linguagem: Inglês
10.1016/s0550-3213(05)80022-7
ISSN1873-1562
AutoresPeter J. Cho, Benjamı́n Grinstein,
Tópico(s)High-Energy Particle Collisions Research
ResumoAn effective five-quark hamiltonian for b → s decay processes is derived by integrating out a heavy top quark with mt2 ≫ mw2 from the minimal six-quark standard model. The leading strong interaction corrections to this hamiltonian are then determined in an effective field theory computation. The renormalization group running of the operators in the effective hamiltonian between a top quark scale of 250 GeV and the W-scale is found to be significant and enhances the inclusive rate for the rare weak decay ̄B → Xsγ by about 14%.
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