Publication: B decays to two pseudoscalars and a generalized Δi= 12 rule
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Issued Date
2014
Resource Type
File Type
application/pdf
ISSN
15507998
Other identifier(s)
2-s2.0-84902971144
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Physical Review D - Particles, Fields, Gravitation and Cosmology. Vol 89, No.11 (2014)
Suggested Citation
Grinstein B., Stone D.C., Pirtskhalava D., Uttayarat P. B decays to two pseudoscalars and a generalized Δi= 12 rule. Physical Review D - Particles, Fields, Gravitation and Cosmology. Vol 89, No.11 (2014). doi:10.1103/PhysRevD.89.114014 Retrieved from: https://hdl.handle.net/20.500.14740/6657
Author(s)
Abstract
We perform an isospin analysis of B decays to two pseudoscalars. The analysis extracts appropriate Cabbibo-Kobayashi-Maskawa matrix elements and short distance loop factors to allow for comparison of nonperturbative QCD effects in the reduced matrix elements of the amplitudes. In decays where penguin diagrams compete with tree-level diagrams we find that the reduced matrix elements of the penguin diagrams, which are singlets or doublets under isospin, are significantly enhanced compared with the triplet and fourplet contributions of the weak Hamiltonian. This similarity to the ΔI=12 rule in K→ππ decays suggests that, more generally, processes mediated by Hamiltonians in lower-dimensional isospin representations see enhancement over higher-dimensional ones in QCD. © 2014 American Physical Society.