Speaker
Description
I will present our work on the application of a combination of soft collinear effective theory and non-relativistic QCD to observables in quarkonium production and decay that are sensitive to soft gluon radiation, in particular measurements that are sensitive to small transverse momentum. Ultimately the aim is to use this approach to study quarkonium production in hadronic collisions at small transverse momentum. In my talk I will present the simpler scenario where a chi_c decays to light quarks followed by the fragmentation of those quarks to light hadrons. This example has all the elements of hadronic production: factorization involving transverse momentum dependent parton distribution, fragmentation functions and new quarkonium shape functions. It also has large logarithms both in invariant mass and rapidity that can be resumed.
