Power corrections to B̄ → Xu ℓ̄ν (X sγ) decay spectra in the "shape-function" region

Martin Beneke; Francisco Campanario; Thomas Mannel; Benjamin D. Pecjak

doi:10.1088/1126-6708/2005/06/071

Power corrections to B̄ → X_u ℓ̄ν (X _sγ) decay spectra in the "shape-function" region

Martin Beneke, Francisco Campanario, Thomas Mannel, Benjamin D. Pecjak

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

48 Scopus citations

Abstract

Using soft-collinear effective theory (SCET), we examine the 1/m _b corrections to the factorization formulas for inclusive semi-leptonic B decays in the endpoint region, where the hadronic final state consists of a single jet. At tree level, we find a new contribution from four-quark operators that was previously assumed absent. Beyond tree level many sub-leading shape-functions are needed to correctly describe the decay process.

Original language	English
Pages (from-to)	1635-1668
Number of pages	34
Journal	Journal of High Energy Physics
Issue number	6
DOIs	https://doi.org/10.1088/1126-6708/2005/06/071
State	Published - 1 Jun 2005
Externally published	Yes

Keywords

B-Physics
Heavy Quarks Physics
QCD

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10.1088/1126-6708/2005/06/071

Cite this

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abstract = "Using soft-collinear effective theory (SCET), we examine the 1/m b corrections to the factorization formulas for inclusive semi-leptonic B decays in the endpoint region, where the hadronic final state consists of a single jet. At tree level, we find a new contribution from four-quark operators that was previously assumed absent. Beyond tree level many sub-leading shape-functions are needed to correctly describe the decay process.",

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AU - Beneke, Martin

AU - Campanario, Francisco

AU - Mannel, Thomas

AU - Pecjak, Benjamin D.

PY - 2005/6/1

Y1 - 2005/6/1

N2 - Using soft-collinear effective theory (SCET), we examine the 1/m b corrections to the factorization formulas for inclusive semi-leptonic B decays in the endpoint region, where the hadronic final state consists of a single jet. At tree level, we find a new contribution from four-quark operators that was previously assumed absent. Beyond tree level many sub-leading shape-functions are needed to correctly describe the decay process.

AB - Using soft-collinear effective theory (SCET), we examine the 1/m b corrections to the factorization formulas for inclusive semi-leptonic B decays in the endpoint region, where the hadronic final state consists of a single jet. At tree level, we find a new contribution from four-quark operators that was previously assumed absent. Beyond tree level many sub-leading shape-functions are needed to correctly describe the decay process.

KW - B-Physics

KW - Heavy Quarks Physics

KW - QCD

UR - http://www.scopus.com/inward/record.url?scp=22144496127&partnerID=8YFLogxK

U2 - 10.1088/1126-6708/2005/06/071

DO - 10.1088/1126-6708/2005/06/071

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JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 6

ER -

Power corrections to B̄ → X_u ℓ̄ν (X _sγ) decay spectra in the "shape-function" region

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Keywords

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