1997/02/03 by Eric Braaten, Braaten, Eric · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9702225
33 pages, LaTeX using the World Scientific style file sprocl.sty, based on a series of lectures presented at the Third International Workshop on Particle Phenomenology held in Taipei in November 1996
arxiv created 1997/02/03 · arxiv updated 2009/11/30
I present an introduction to the NRQCD factorization method for calculating annihilation rates and inclusive production rates for heavy quarkonium. Using this method, annihilation decay rates and sufficiently inclusive cross sections are factored into long-distance NRQCD matrix elements and perturbative short-distance coefficients. I derive the velocity-scaling rules that are used to estimate the magnitudes of the nonperturbative NRQCD matrix elements and I describe perturbative matching methods for calculating their short-distance coefficients. Some simple applications for which NRQCD factorization methods have dramatic implications are discussed.