Probing electroweak physics for all B→XM decays in the endpoint region

Junegone Chay, Chul Kim, Adam K. Leibovich, Jure Zupan

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Using soft-collinear effective theory we describe at leading order in 1/mb all the semi-inclusive hadronic B→XM decays near the endpoint, where an energetic light meson M recoils against an inclusive jet X. Here we extend to the decays in which spectator quarks go into the jet X, and also include the decays involving η, η′ mesons that receive additional contributions from gluonic operators. The predicted branching ratios and CP asymmetries depend on fewer hadronic parameters than the corresponding two-body B decays. This makes semi-inclusive hadronic B→XM decays a powerful probe of the potential nonperturbative nature of charming penguins as well as a useful probe of new physics effects in electroweak flavor changing transitions. A comparison with B→KX data from BABAR points to an enhanced charming penguin, albeit with large experimental errors.

Original languageEnglish
Article number094031
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume76
Issue number9
DOIs
Publication statusPublished - 2007 Nov 30

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Physics
Decay
physics
decay
Mesons
Probe
mesons
probes
Collinear
Asymmetry
Quarks
Branching
asymmetry
quarks
operators
Operator

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Probing electroweak physics for all B→XM decays in the endpoint region. / Chay, Junegone; Kim, Chul; Leibovich, Adam K.; Zupan, Jure.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 76, No. 9, 094031, 30.11.2007.

Research output: Contribution to journalArticle

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