The B -> X_s gamma Photon Spectrum

Abstract

The photon energy spectrum in inclusive weak radiative B -> X_s gamma decay is computed to order alpha_s^2 beta_0. This result is used to extract a value for the HQET parameter $\bar{\Lambda }$ from the average <1-2E_γ/m_B>, and a value of the parameter ${\lambda }_1$ from <(1-2E_γ/m_B)^2>. An accurate measurement of <1-2E_γ/m_B> can determine the size of the nonperturbative contributions to the Upsilon(1S) mass which cannot be absorbed into the b quark pole mass.

16 pages, RevTeX

References in corpus (4)

• QCD Anatomy of B -> X_s gamma Decays
• B decay and the Upsilon mass
• B decays in the upsilon expansion
• Model independent determination of the light-cone wave functions for exclusive processes

Cited by in corpus (52)

• Updated NNLO QCD predictions for the weak radiative B-meson decays
• Branching Fraction and Photon Energy Spectrum b -> s gamma
• Quark mass effects in B -> Xs gamma
• Weak Radiative Decays of the B Meson and Bounds on $M_{H^{\pm }}$ in the Two-Higgs-Doublet Model
• NNLO QCD corrections to the B -> X_s gamma matrix elements using interpolation in m_c
• Global analysis of inclusive B decays
• Present Status of Inclusive Rare B Decays
• Renormalization-Group Improved Calculation of the B->Xs+gamma Branching Ratio
• Shape function effects in B -> X_s gamma and B -> X_u l nu decays
• Towards B -> X_s gamma at the NNLO in QCD without interpolation in m_c
• Toward a NNLO calculation of the B-->X_s gamma decay rate with a cut on photon energy: I. Two-loop result for the soft function
• Imprecated, yet Impeccable: On the Theoretical Evaluation of Gamma(B -> X_c \ell ν)
• Analysis of Br(B-->X_s gamma) at NNLO with a Cut on Photon Energy
• B, D and K decays
• Precision determination of |V_{ub}| from inclusive decays
• The photon polarization in B -> X gamma in the standard model
• The photon energy spectrum in B-> X_s + γin perturbative QCD through O(α_s^2)
• Radiative and Electroweak Penguin Decays of B Mesons
• Upper Bounds on Rare K and B Decays from Minimal Flavour Violation
• Fermionic NNLL corrections to b -> s γ
• B decay shape variables and the precision determination of |Vcb| and mb
• NNLO fermionic corrections to the charm quark mass dependent matrix elements in B -> X_s gamma
• On the photon energy moments and their `bias' corrections in B -> X_s+γ
• Enhanced subleading structure functions in semileptonic B decay
• Resummed Photon Spectra for WIMP Annihilation
• Advanced Predictions for Moments of the B->X_s+gamma Photon Spectrum
• Measurement of B(B-->X_s γ), the B-->X_s γ photon energy spectrum, and the direct CP asymmetry in B-->X_{s+d} γ decays
• Magnetic dipole operator contributions to the photon energy spectrum in anti-B -> X(s) gamma at O(alpha(s)^2)
• Charm quark mass dependence of the electromagnetic dipole operator contribution to anti-B -> X(s) gamma at O(alpha**2(s))
• The Mass of the b Quark
• Completing the Calculation of BLM corrections to B -> Xs gamma
• Fermionic corrections to the interference of the electro- and chromomagnetic dipole operators in anti-B --> X(s) gamma at O(alpha(s)**2)
• Radiative B decay spectrum: DGE at NNLO
• Heavy quark symmetry in B -> D(*) ell nu spectra
• Chromomagnetic Dipole-Operator Corrections in Bbar -> X_sgamma at O(beta_0 alpha_s^2)
• Large-m_c Asymptotic Behaviour of O(alpha_s^2) Corrections to B -> X_s gamma
• The Resummed Rate for B -> X_s gamma
• Tree-level contributions to B -> Xs gamma
• A two-loop relation between inclusive radiative and semileptonic B-decay spectra
• Precision Global Determination of the $B\to X_s\gamma$ Decay Rate
• Taming the B --> X(s) gamma spectrum by Dressed Gluon Exponentiation
• Subleading shape function contributions to the hadronic invariant mass spectrum in B -> X_u l νdecay
• Radiative and semi-leptonic B-meson decay spectra: Sudakov resummation beyond logarithmic accuracy and the pole mass
• Complete (O_7,O_8) contribution to B -> X_s gamma at order alpha_s^2
• Status of SM calculations of b > s transitions
• Perturbative corrections to the determination of Vub from the P+ spectrum in B->X_u l nu
• Comparing B -> X_u l nu_l to B -> X_s gamma
• Running-coupling effects in the triple-differential charmless semileptonic decay width
• Specific three-loop contributions to $b\to s\gamma$ associated with the current-current operators
• QCD Corrections to the Radiative Decay B -> X_s gamma
• Developments in the evaluation of m_c dependent matrix elements in B -> Xs gamma at NNLO
• High order perturbative corrections to the determination of |Vub| from the P+ spectrum in B -> Xu l nu