Breakdown of Nonrelativistic QCD Factorization in Processes Involving Two Quarkonia and its Cure

by Dr Xiang-Peng Wang (Argone National Laboratory, USA)

Sunday 19 Jan 2025, 14:40 → 16:00 Asia/Shanghai

Meeting Room 410,TDLI（Tsung-Dao Lee Library）

Abstract

We study inclusive processes involving two heavy quarkonia in nonrelativistic QCD (NRQCD) and demonstrate that, in the presence of two P-wave Fock states, NRQCD factorization breaks down, leaving uncanceled infrared singularities. We infer that such singularities will appear for double quarkonium hadroproduction at next-to-leading order. As a solution to this problem, we introduce to NRQCD effective field theory new types of operators whose quantum corrections absorb these singularities.

Biography

2014 – 2018 PhD at Universität Hamburg & DESY, Hamburg, Germany 2011 – 2014 MA at University of Chinese Academy of Sciences, Beijing, China 2007 – 2011 BA at Jilin University, Changchun, China

Division

Particle and Nuclear