Unpolarized transverse momentum dependent parton distributions of the nucleon from lattice QCD

Journal Article · Tue Jun 18 00:00:00 UTC 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.114513 · OSTI ID:2375542

He, Jin-Chen; Chu, Min-Huan; Hua, Jun; Ji, Xiangdong; Schäfer, Andreas; Su, Yushan; Wang, Wei; Yang, Yi-Bo; Zhang, Jian-Hui; Zhang, Qi-An

We present a first lattice QCD calculation of the unpolarized nucleon’s isovector transverse-momentum-dependent parton distribution functions (TMDPDFs), which are essential to predict observables of multiscale, semi-inclusive processes in the standard model. We use a $N_f=2+1+1$ MILC ensemble with valence clover fermions on a highly improved staggered quark (HISQ) sea to compute the quark momentum distributions in a large-momentum nucleon on the lattice. The state-of-the-art techniques in renormalization and extrapolation in the correlation distance on the lattice are adopted. The perturbative kernel up to next-to-next-to-leading order is taken into account, and the dependence on the pion mass and the hadron momentum is explored. Our results are qualitatively comparable with phenomenological TMDPDFs, which provide an opportunity to predict high energy scatterings from first principles. Published by the American Physical Society 2024

• Research Organization: Temple Univ., Philadelphia, PA (United States); Univ. of Maryland, College Park, MD (United States)
• Sponsoring Organization: USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: SC0020682; SC0023646
• OSTI ID: 2375542
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical SocietyCopyright Statement
• Country of Publication: United States
• Language: English