Subleading shape function contributions to the hadronic invariant mass spectrum in B -> X_u l νdecay
arXiv:hep-ph/0312366 · doi:10.1103/PhysRevD.69.074015
Abstract
We study the O(Lambda/mb) corrections to the singly and doubly differential hadronic invariant mass spectra dΓ/dsH and dΓ/dsH dq^2 in b -> u decays, and discuss the implications for the extraction of the CKM matrix element |Vub|. Using simple models for the subleading shape functions, the effects of subleading operators are estimated to be at thefew percent level for experimentally relevant cuts. The subleading corrections proportional to the leading shape function are larger, but largely cancel in the relation between the hadronic invariant mass spectrum and the photon spectrum in B -> X_s γ. We also discuss the applicability of the usual prescription of convoluting the partonic level rate with the leading light-cone wavefunction of the b quark to subleading order.
26 pages, 7 figures
Cited by in corpus (19)
- CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
- Factorization and Shape-Function Effects in Inclusive B-Meson Decays
- Subleading Shape Functions in Inclusive B Decays
- Factorization for Power Corrections to B->Xs gamma and B-> Xu e nu
- Power corrections to B\to X_u l ν(X_sγ) decay spectra in the "shape-function" region
- Proposal for a Precision Measurement of |Vub|
- Subleading Jet Functions in Inclusive B Decays
- Shape-Function Effects and Split Matching in B-> Xs l+ l-
- A two-loop relation between inclusive radiative and semileptonic B-decay spectra
- Full-Phase-Space Twist Expansion in Semileptonic and Radiative B-Meson Decays
- Experimental Limits on Weak Annihilation Contributions to b -->u ell nu Decay
- Nonperturbative m_X cut effects in B -> Xs l+ l- observables
- Perturbative corrections to the determination of Vub from the P+ spectrum in B->X_u l nu
- Shape Function Effects in B -> X_c l ν_l
- Shape-function independent relations of charmless inclusive B-decay spectra
- Impact of Four-Quark Shape Functions on Inclusive B Decay Spectra
- Towards the Anomalous Dimension to Order Lambda_QCD/m_b for Phase Space Restricted B --> X(u) ell anti-nu and B --> X(s) gamma
- Soft-Collinear Factorization and Sudakov Resummation of Heavy Meson Decay Amplitudes with Effective Field Theories
- QCD Beyond Leading Power