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

Abstract

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 (≳10 GeV) of the process as compared with similar scenarios that arise in semi-inclusive deep inelastic scattering and fixed-target Drell-Yan measurements.

Authors:
 [1]; ORCiD logo [2];  [2]; ORCiD logo [3]
  1. Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics
  2. Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Theory Center
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Theory Center; Argonne National Lab. (ANL), Lemont, IL (United States). Physics Div.; Univ. di Pavia, Pavia (Italy). Dipartimento di Fisica; INFN, Sezione di Pavia, Pavia (Italy)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1574290
Report Number(s):
JLAB-THY-19-3020; DOE/OR/23177-4766; arXiv:1909.02951
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:  
SC0018106; AC02-06CH11357; AC05-06OR23177; 795475
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 100; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Moffat, E., Rogers, T. C., Sato, N., and Signori, A. Collinear factorization in wide-angle hadron pair production in e+e– annihilation. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.094014.
Moffat, E., Rogers, T. C., Sato, N., & Signori, A. Collinear factorization in wide-angle hadron pair production in e+e– annihilation. United States. doi:10.1103/PhysRevD.100.094014.
Moffat, E., Rogers, T. C., Sato, N., and Signori, A. Thu . "Collinear factorization in wide-angle hadron pair production in e+e– annihilation". United States. doi:10.1103/PhysRevD.100.094014. https://www.osti.gov/servlets/purl/1574290.
@article{osti_1574290,
title = {Collinear factorization in wide-angle hadron pair production in e+e– annihilation},
author = {Moffat, E. and Rogers, T. C. and Sato, N. and Signori, A.},
abstractNote = {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 (≳10 GeV) of the process as compared with similar scenarios that arise in semi-inclusive deep inelastic scattering and fixed-target Drell-Yan measurements.},
doi = {10.1103/PhysRevD.100.094014},
journal = {Physical Review D},
number = 9,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}

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