QCD Sum Rules on the Light-Cone, Factorisation and SCET

Abstract

The accurate calculation of weak heavy-to-light form factors is crucial for the determination of CKM matrix elements from experimental data on B decays. In SCET, the soft-collinear effective theory, these form factors can, in the heavy quark limit, be split into a factorisable part that is calculable in perturbation theory, and a nonfactorisable part that observes certain spin-symmetries. I discuss the relation between the SCET factorisation formulas and the heavy quark limit of the corresponding QCD sum rules on the light-cone. I also analyse the numerical size of factorisable and nonfactorisable parts and corrections suppressed by powers of the b quark mass.

22 pages

References in corpus (12)

• Symmetry-breaking corrections to heavy-to-light B meson form factors at large recoil
• Heavy-to-Light Form Factors in the Final Hadron Large Energy Limit of QCD
• B->pi and B->K Transitions from QCD Sum Rules on the Light-Cone
• Exclusive Radiative B-Decays in the Light-Cone QCD Sum Rule Approach
• Renormalization-Group Evolution of the B-Meson Light-Cone Distribution Amplitude
• Predictions on $B\to \pi \bar{l}{\nu }_l$, $D\to \pi \bar{l}{\nu }_l$ and $D\to K\bar{l}{\nu }_l$ from QCD Light-Cone Sum Rules
• Perturbative QCD Correction to the $B\to \pi$ Transition Form Factor
• CLEO and E791 data: A smoking gun for the pion distribution amplitude?
• On Power Suppressed Operators and Gauge Invariance in SCET
• SU(3) Breaking in K and K* Distribution Amplitudes
• Subleading collinear operators and their matrix elements
• Exclusive Semileptonic and Rare Radiative B Decays from QCD Sum Rules

Cited by in corpus (14)

• New Results on B->pi, K, eta Decay Formfactors from Light-Cone Sum Rules
• B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited
• Symmetries and Asymmetries of B -> K* mu+ mu- Decays in the Standard Model and Beyond
• Higher-Twist Distribution Amplitudes of the K Meson in QCD
• The B-Meson Distribution Amplitude in QCD
• Light-cone sum rules for $B\to \pi$ form factors revisited
• $B$-Meson Distribution Amplitude from the $B\to \pi$ Form Factor
• |V_td/V_ts| from B-> V gamma
• Semileptonic charm decays $D\to \pi l{\nu }_{ł}$ and $D\to Kl{\nu }_l$ from QCD Light-Cone Sum Rules
• Perturbative corrections to $B\to D$ form factors in QCD
• Constraining the Unitarity Triangle with B -> V gamma
• The phenomenology of rare and semileptonic B decays
• Determination of |Vub|
• B->pi,K,eta Decay Formfactors from Light-Cone Sum Rules