Azimuthal angle distribution in B→K*(→Kπ)ℓ+- in the low invariant mℓ+ℓ- region

Choong Sun Kim, Yeong Gyun Kim, Cai Dian Lü, Takuya Morozumi

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

We present the angular distribution of the rare B decay, B→K*(→Kπ)ℓ+-. By studying the azimuthal angle distribution in the low invariant mass region of dileptons, we can probe new physics effects efficiently. In particular, this distribution is found to be quite sensitive to the ratio of the contributions from two independent magnetic moment operators, which also contribute to B→K*γ. Therefore, our method can be very useful when new physics is introduced without changing the total decay rate of the b→s γ. The angular distributions are compared with the predictions of the standard model, and are shown for the cases when the aforementioned ratio is different from the standard model prediction.

Original languageEnglish
Article number034013
Pages (from-to)1-9
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume62
Issue number3
Publication statusPublished - 2000 Aug 1

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angular distribution
physics
predictions
decay rates
magnetic moments
operators
probes
decay

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We present the angular distribution of the rare B decay, B→K*(→Kπ)ℓ+ℓ-. By studying the azimuthal angle distribution in the low invariant mass region of dileptons, we can probe new physics effects efficiently. In particular, this distribution is found to be quite sensitive to the ratio of the contributions from two independent magnetic moment operators, which also contribute to B→K*γ. Therefore, our method can be very useful when new physics is introduced without changing the total decay rate of the b→s γ. The angular distributions are compared with the predictions of the standard model, and are shown for the cases when the aforementioned ratio is different from the standard model prediction.",
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Azimuthal angle distribution in B→K*(→Kπ)ℓ+- in the low invariant mℓ+ℓ- region. / Kim, Choong Sun; Kim, Yeong Gyun; Lü, Cai Dian; Morozumi, Takuya.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 62, No. 3, 034013, 01.08.2000, p. 1-9.

Research output: Contribution to journalArticle

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