Power corrections to B\to X_u l ν(X_sγ) decay spectra in the "shape-function" region

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.

34 pages, v2: journal version

References in corpus (3)

• Sudakov Resummation for Subleading SCET Currents and Heavy-to-Light Form Factors
• Subleading Shape Functions in Inclusive B Decays
• Loop Corrections to Heavy-to-Light Form Factors and Evanescent Operators in SCET

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