7 papers
Orthopositronium Decay Spectrum using NRQED
Pedro D. Ruiz-Femenia
As noticed in Ref.[1], the Ore-Powell's classical calculation of the o-Ps -> 3 gamma decay amplitude does not fulfill Low's theorem requirements for the low energy end of the photo…
B Decays in the Upsilon Expansion
Zoltan Ligeti
Theoretical predictions for B decay rates are rewritten in terms of the Upsilon meson mass instead of the b quark mass, using a modified perturbation expansion. The theoretical con…
Large N QCD
Aneesh V. Manohar
1. Introduction 2. The Gross-Neveu Model 3. QCD 3.1 N-Counting Rules for Diagrams 3.1.1 U(1) Ghosts 3.2 The 't Hooft Model 3.3 -Counting Rules for Correlation Functions 3.4 The…
QCD from a Large N Perspective
Aneesh V. Manohar
The 1/N expansion of QCD can be used to calculate properties of nucleons and Delta baryons, such as masses, magnetic moments, and pion couplings. The predictions of the 1/N expansi…
Effective Field Theories
Aneesh V. Manohar
These lectures introduce some of the basic notions of effective field theories, as used in particle physics. The topics discussed are the and weak interactions, and…
Chiral Perturbation Theory
Aneesh V. Manohar
The basic ideas and power counting rules of chiral perturbation theory are discussed. The formalism of velocity dependent fields for baryons, and for hadrons containing a heavy qua…