Measuring of |Vub| in the forthcoming decade

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Abstract

I first introduce the importance of measuring Vub precisely. Then, from a theoretician's point of view, I review (a) past history, (b) present trials, and (c) possible future alternatives on measuring \Vub/ and/or |Vub/Vcb. As of my main topic, I introduce a model-independent method, which predicts Γ(B → Xulν)/Γ(B → Xclν) ≡ (γ/γc) × |Vub/Vcb|2 ≃ (1.83±0.28) × |Vub/Vcb\2 and \Vub/Vcb\ ≡ (γc/γu)1/2 × [B(B → Xulν)/B(B → Xclν)]1/2 ≃ (0.74 ± 0.06) × [B(B → Xulν)/B(B → Xclν)]1/2, based on the heavy quark effective theory. I also explore the possible experimental options to separate B → Xulν from the dominant B → Xclν: the measurement of inclusive hadronic invariant mass distributions, and the 'D - π' (and 'K - π') separation conditions. I also clarify the relevant experimental backgrounds.

Original languageEnglish
Pages (from-to)114-121
Number of pages8
JournalNuclear Physics B - Proceedings Supplements
Volume59
Issue number1-3
DOIs
Publication statusPublished - 1997 Nov

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mass distribution
histories
quarks

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

Cite this

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title = "Measuring of |Vub| in the forthcoming decade",
abstract = "I first introduce the importance of measuring Vub precisely. Then, from a theoretician's point of view, I review (a) past history, (b) present trials, and (c) possible future alternatives on measuring \Vub/ and/or |Vub/Vcb. As of my main topic, I introduce a model-independent method, which predicts Γ(B → Xulν)/Γ(B → Xclν) ≡ (γ/γc) × |Vub/Vcb|2 ≃ (1.83±0.28) × |Vub/Vcb\2 and \Vub/Vcb\ ≡ (γc/γu)1/2 × [B(B → Xulν)/B(B → Xclν)]1/2 ≃ (0.74 ± 0.06) × [B(B → Xulν)/B(B → Xclν)]1/2, based on the heavy quark effective theory. I also explore the possible experimental options to separate B → Xulν from the dominant B → Xclν: the measurement of inclusive hadronic invariant mass distributions, and the 'D - π' (and 'K - π') separation conditions. I also clarify the relevant experimental backgrounds.",
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Measuring of |Vub| in the forthcoming decade. / Kim, C. S.

In: Nuclear Physics B - Proceedings Supplements, Vol. 59, No. 1-3, 11.1997, p. 114-121.

Research output: Contribution to journalArticle

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