期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP04(2020)122
关键词
ffective Field Theories; Perturbative QCD; Resummation
资金
- U.S. Department of Energy through the Office of Science, Office of Nuclear Physics [DE-AC52-06NA25396]
- Early Career Research Award, through the LANL/LDRD Program
- European Union [754496 - FELLINI]
- Office of Science, Office of Nuclear Physics, of the U.S. Department of Energy [DE-FG02-04ER41338, DE-FG02-05ER41368]
- Mainz Institute for Theoretical Physics (MITP) of the Cluster of Excellence PRISMA+ [39083149]
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 measurements 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. We derive a factorization theorem that involves transverse momentum distribution (TMD) fragmentation functions and new 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 to resum large logarithms. This theoretical framework will provide a systematic treatment of quarkonium production and decay processes in TMD sensitive measurements.
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