Nov 25 – 29, 2019
University of Pavia
Europe/Rome timezone

An EFT approach to quarkonium at small transverse momentum

Nov 26, 2019, 10:30 AM
Aula Foscolo (University of Pavia)

Aula Foscolo

University of Pavia

Via Strada Nuova 65, Pavia


Yiannis Makris


In this work we apply effective field theory (EFT) to observables in quarkonium production and decay that are sensitive to soft gluon radiation, in particular measurement that are sensitive to small transverse momentum. Within the EFT framework we study $\chi_{Q}$ decay to light quarks followed by the fragmentation of those quarks to light hadrons and derive a factorization theorem that involves the un-subtracted transverse momentum distributions (TMDs) and quarkonium TMD shape functions. We derive renormalization group equations, both in rapidity and virtuality, which are used to evolve the different terms in the factorization theorem and resum large logarithms. This theoretical framework will provide a systematic treatment of quarkonium production and decay processes in TMD sensitive measurements

Primary author

Presentation materials