Collinear factorization in wide-angle hadron pair production in e + e − annihilation

Moffat, E.; Rogers, T. C.; Sato, N.; Signori, A.

doi:10.1103/PhysRevD.100.094014

Title: Collinear factorization in wide-angle hadron pair production in $e^{+} e^{-}$ annihilation

Journal Article · Thu Nov 14 00:00:00 EST 2019 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.100.094014· OSTI ID:1607556

Moffat, E.;

; Sato, N.;

We compute the inclusive unpolarized dihadron production cross section in the far from back-to-back region of e(+)e(-) annihilation in leading order pQCD using existing fragmentation function fits and standard collinear factorization, focusing on the large transverse momentum region where transverse momentum is comparable to the hard scale (the center-of-mass energy). We compare with standard transverse-momentum-dependent (TMD) fragmentation function-based predictions intended for the small transverse momentum region with the aim of testing the expectation that the two types of calculation roughly coincide at intermediate transverse momentum. We find significant tension, within the intermediate transverse momentum region, between calculations done with existing nonperturbative TMD fragmentation functions and collinear factorization calculations if the center-of-mass energy is not extremely large. We argue that e(+)e(-) measurements are ideal for resolving this tension and exploring the large-to-small transverse momentum transition, given the typically larger hard scales (greater than or similar to 10 GeV) of the process as compared with similar scenarios that arise in semi-inclusive deep inelastic scattering and fixed-target Drell-Yan measurements.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Old Dominion Univ., Norfolk, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26), Washington, DC (United States); European Commission (EC)

Grant/Contract Number:: SC0018106; AC02-06CH11357; AC05-06OR23177; 795475

OSTI ID:: 1607556

Alternate ID(s):: OSTI ID: 1574290; OSTI ID: 1581245; OSTI ID: 1593804

Report Number(s):: JLAB-THY-19-3020; DOE/OR/23177-4766; arXiv:1909.02951; arXiv:1909.02951v2; PRVDAQ; 094014

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 100 Journal Issue: 9; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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