Quasifragmentation functions in the massive Schwinger model

Journal Article · 10 December 2024 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.110.116009 · OSTI ID:2480986

Grieninger, Sebastian  ^[1]; Zahed, Ismail ^[1]

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1. Stony Brook University, NY (United States)

We introduce the concept of the quark quasifragmentation function (qFF) using an equal-time and spatially boosted form of the Collins-Soper fragmentation function where the out-meson fragment is replaced by the current asymptotic condition. We derive the qFF for a fermion in two-dimensional quantum electrodynamics (QED2) using the Kogut-Susskind Hamiltonian after a mapping onto spin qubits in a spatial lattice with open boundary conditions. This form is suitable for quantum computations. We compute the qFF by exact diagonalization of the spin Hamiltonian. The results are compared to the qFF following from the Drell-Levy-Yan result for QED2, both at strong and weak coupling, and to two-dimensional quantum chromodynamics in the lowest Fock approximation.

• Research Organization: Temple University-Of The CommonWealth System Of Higher Education, Philadelphia, PA (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC)
• Grant/Contract Number: SC0012704; SC0023646
• OSTI ID: 2480986
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 11 Vol. 110; ISSN 2470-0010; ISSN 2470-0029
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English