Workshop on Resummation, Evolution, Factorization (REF 2019)

Session

Tuesday 1

Nov 26, 2019, 9:00 AM

Aula Foscolo (University of Pavia)

Conveners

Tuesday 1

• Alessandro Bacchetta (PV)

65. Quarkonium production measurements as a tool for TMD studies

Vato Kartvelishvili (Lancaster University)

11/26/19, 9:00 AM

An overview will be given of recent experimental results on quarkonium production at the LHC, both inclusive and in association with other particles, such as W, Z bosons or another quarkonium. The challenges of making such measurements will be highlighted, and possible applications for extracting gluon TMDs will be discussed.

42. Single-spin asymmetries in $p^\uparrow p\rightarrow J/\psi$ collision within a TMD approach

Rajesh Sangem (Istituto Nazionale di Fisica Nucleare)

11/26/19, 9:30 AM

Quarkonium production has been advertised as a tool to probe the gluon TMDs. Among the eight gluon TMDs, gluon Sivers function has been receiving paramount of interest both theoretically and experimentally. We study the single-spin asymmetry (SSA) in proton-proton collision process in $J/\psi$ production by employing the generalized parton model (GPM), and compare SSA with PHENIX data. We...

19. Resummation in Heavy Quarkonium Production

Hee Sok Chung (Technical University of Munich)

11/26/19, 10:00 AM

We discuss resummation of large logarithms in heavy quarkonium production cross sections. Due to the nonrelativistic nature of heavy quarkonium states, nonperturbative matrix elements of heavy quarkonia can involve singular distributions. In such cases, standard methods of solving evolution equations can lead to nonconverging integrals or series. We discuss methods to overcome these...

10. An EFT approach to quarkonium at small transverse momentum

Yiannis Makris

11/26/19, 10:30 AM

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...