Measuring of |Vub| in the forthcoming decade

C. S. Kim

doi:10.1016/S0920-5632(97)00433-7

Measuring of |V_ub| in the forthcoming decade

C. S. Kim

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

I first introduce the importance of measuring V_ub precisely. Then, from a theoretician's point of view, I review (a) past history, (b) present trials, and (c) possible future alternatives on measuring \V_ub/ and/or |V_ub/V_cb. As of my main topic, I introduce a model-independent method, which predicts Γ(B → X_ulν)/Γ(B → X_clν) ≡ (γ/γc) × |V_ub/V_cb|² ≃ (1.83±0.28) × |V_ub/V_cb\² and \V_ub/V_cb\ ≡ (γc/γu)^1/2 × [B(B → X_ulν)/B(B → X_clν)]^1/2 ≃ (0.74 ± 0.06) × [B(B → X_ulν)/B(B → X_clν)]^1/2, based on the heavy quark effective theory. I also explore the possible experimental options to separate B → X_ulν from the dominant B → X_clν: 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 language	English
Pages (from-to)	114-121
Number of pages	8
Journal	Nuclear Physics B - Proceedings Supplements
Volume	59
Issue number	1-3
DOIs	https://doi.org/10.1016/S0920-5632(97)00433-7
Publication status	Published - 1997 Nov

Bibliographical note

Funding Information:
*Present address till Feb. 1997: Theory Division, KEK, Tsukuba, Ibaraki 305, Japan. The work was supported in part by the KOSEF, Project No. 951-0207-0P08-2, in part by the BSRI Program, Project No. BSRI-97-2425, in part by CTP of SNU, and in part by the COE fellowship of Japanese Government.

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/S0920-5632(97)00433-7

Cite this

@article{b203a779cad1439f94827138bf188684,

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.",

author = "Kim, {C. S.}",

note = "Funding Information: *Present address till Feb. 1997: Theory Division, KEK, Tsukuba, Ibaraki 305, Japan. The work was supported in part by the KOSEF, Project No. 951-0207-0P08-2, in part by the BSRI Program, Project No. BSRI-97-2425, in part by CTP of SNU, and in part by the COE fellowship of Japanese Government.",

year = "1997",

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doi = "10.1016/S0920-5632(97)00433-7",

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N1 - Funding Information: *Present address till Feb. 1997: Theory Division, KEK, Tsukuba, Ibaraki 305, Japan. The work was supported in part by the KOSEF, Project No. 951-0207-0P08-2, in part by the BSRI Program, Project No. BSRI-97-2425, in part by CTP of SNU, and in part by the COE fellowship of Japanese Government.

PY - 1997/11

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N2 - 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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