Publications
Publication Information
| Title | Collinear Factorization in Wide-Angle Hadron Pair Production in $e^+e^-$ Annihilation |
| Authors | Ted Rogers,Nobuo Sato Gonzalez,Eric Moffat,Andrea Signori |
| JLAB number | JLAB-THY-19-3020 |
| LANL number | arXiv:1909.02951 |
| Other number | DOE/OR/23177-4766 |
| Document Type(s) | (Journal Article) |
| Supported by U.S. Naval Research: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | DOE, Award Number DE-SC0018106. DOE, contract no. DE-AC02-06CH11357. |
|
Journal Compiled for Physical Review D Volume 100 Page(s) 094014 Refereed | |
| Publication 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 non-perturbative 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 ($\gtrsim 12$~GeV) of the process as compared with similar scenarios that arise in semi-inclusive deep inelastic scattering and fixed-target Drell-Yan measurements. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.100.094014 |
| Accepted Manuscript: | PhysRevD.100.094014.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |