Hadronic invariant mass spectrum in B→Xulv decay with a lepton energy cut

K. K. Jeong, Choong Sun Kim, Yeong Gyun Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We discuss the implications of a charged lepton energy cut to the hadronic invariant mass spectrum in charmless semileptonic B decays. A charged-lepton energy cut is inevitable in order to remove secondary leptonic events such as b→c, τ→l, and to identify the charged-leptons at detectors experimentally. We consider three possible lepton energy cuts, Ecutsl=0.6, 1.5, and 2.3 GeV, and find that with the most probable cuts Ecutl=1.5 GeV and MmaxX=1.5 (1.86) GeV, 45-60% (58-67%) of decay events survive. Therefore, B→Xulν decay events can be efficiently distinguished from B→Xclν decay events. We also discuss the possible model dependence of the results.

Original languageEnglish
Article number014005
Pages (from-to)140051-140057
Number of pages7
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume63
Issue number1
Publication statusPublished - 2001 Jan 1

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mass spectra
leptons
decay
energy
detectors

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "We discuss the implications of a charged lepton energy cut to the hadronic invariant mass spectrum in charmless semileptonic B decays. A charged-lepton energy cut is inevitable in order to remove secondary leptonic events such as b→c, τ→l, and to identify the charged-leptons at detectors experimentally. We consider three possible lepton energy cuts, Ecutsl=0.6, 1.5, and 2.3 GeV, and find that with the most probable cuts Ecutl=1.5 GeV and MmaxX=1.5 (1.86) GeV, 45-60{\%} (58-67{\%}) of decay events survive. Therefore, B→Xulν decay events can be efficiently distinguished from B→Xclν decay events. We also discuss the possible model dependence of the results.",
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Hadronic invariant mass spectrum in B→Xulv decay with a lepton energy cut. / Jeong, K. K.; Kim, Choong Sun; Kim, Yeong Gyun.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 63, No. 1, 014005, 01.01.2001, p. 140051-140057.

Research output: Contribution to journalArticle

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N2 - We discuss the implications of a charged lepton energy cut to the hadronic invariant mass spectrum in charmless semileptonic B decays. A charged-lepton energy cut is inevitable in order to remove secondary leptonic events such as b→c, τ→l, and to identify the charged-leptons at detectors experimentally. We consider three possible lepton energy cuts, Ecutsl=0.6, 1.5, and 2.3 GeV, and find that with the most probable cuts Ecutl=1.5 GeV and MmaxX=1.5 (1.86) GeV, 45-60% (58-67%) of decay events survive. Therefore, B→Xulν decay events can be efficiently distinguished from B→Xclν decay events. We also discuss the possible model dependence of the results.

AB - We discuss the implications of a charged lepton energy cut to the hadronic invariant mass spectrum in charmless semileptonic B decays. A charged-lepton energy cut is inevitable in order to remove secondary leptonic events such as b→c, τ→l, and to identify the charged-leptons at detectors experimentally. We consider three possible lepton energy cuts, Ecutsl=0.6, 1.5, and 2.3 GeV, and find that with the most probable cuts Ecutl=1.5 GeV and MmaxX=1.5 (1.86) GeV, 45-60% (58-67%) of decay events survive. Therefore, B→Xulν decay events can be efficiently distinguished from B→Xclν decay events. We also discuss the possible model dependence of the results.

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