Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/14066
ชื่อเรื่อง: B decays to two pseudoscalars and a generalized Δi= 12 rule
ผู้แต่ง: Grinstein B.
Stone D.C.
Pirtskhalava D.
Uttayarat P.
วันที่เผยแพร่: 2014
บทคัดย่อ: 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.
URI: https://ir.swu.ac.th/jspui/handle/123456789/14066
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902971144&doi=10.1103%2fPhysRevD.89.114014&partnerID=40&md5=780cd42af7c654dfde796d96a7751554
ISSN: 15507998
Appears in Collections:Scopus 1983-2021

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