First simultaneous global QCD analysis of dihadron fragmentation functions and transversity parton distribution functions

被引：6

作者：

Cocuzza, C. ^{[1
]}

Metz, A. ^{[1
]}

Pitonyak, D. ^{[2
,3
]}

Prokudin, A. ^{[4
]}

Sato, N. ^{[4
]}

Seidl, R. ^{[5
]}

机构：

[1] Temple Univ, Dept Phys, SERC, Philadelphia, PA 19122 USA

[2] Lebanon Valley Coll, Dept Phys, Annville, PA 17003 USA

[3] Penn State Univ Berks, Div Sci, Reading, PA 19610 USA

[4] Jefferson Lab, Newport News, VA 23606 USA

[5] RIKEN, BNL Res Ctr, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 03期

基金：

美国国家科学基金会;

关键词：

LEADING ORDER DETERMINATION; ELECTRIC-DIPOLE MOMENTS; KAON PRODUCTION; COLLISIONS; E(+)E(-); PION; NUCLEAR; HADRON; EP; CONSTRAINTS;

D O I：

10.1103/PhysRevD.109.034024

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a comprehensive study within quantum chromodynamics (QCD) of dihadron observables in electron-positron annihilation, semi-inclusive deep-inelastic scattering, and proton-proton collisions, including recent cross section data from Belle and azimuthal asymmetries from STAR. We extract simultaneously for the first time pi+ pi- dihadron fragmentation functions (DiFFs) and the nucleon transversity distributions for up and down quarks as well as antiquarks. For the transversity distributions we impose their small-x asymptotic behavior and the Soffer bound. In addition, we utilize a new definition of DiFFs that has a number density interpretation to then calculate expectation values for the dihadron invariant mass and momentum fraction. Furthermore, we investigate the compatibility of our transversity results with those from single-hadron fragmentation (from a transverse momentum dependent/collinear twist-3 framework) and the nucleon tensor charges computed in lattice QCD. We find a universal nature to all of this available information. Future measurements of dihadron production can significantly further this research, especially, as we show, those that are sensitive to the region of large parton momentum fractions.

引用

页数：30

共 155 条

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