تقرير
First simultaneous global QCD analysis of dihadron fragmentation functions and transversity parton distribution functions
| العنوان: | First simultaneous global QCD analysis of dihadron fragmentation functions and transversity parton distribution functions |
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| المؤلفون: | Cocuzza, C., Metz, A., Pitonyak, D., Prokudin, A., Sato, N., Seidl, R. |
| سنة النشر: | 2023 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment, High Energy Physics - Lattice, Nuclear Experiment, Nuclear Theory |
| الوصف: | 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. Comment: 34 pages, 24 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.109.034024 |
| الوصول الحر: | http://arxiv.org/abs/2308.14857Test |
| رقم الانضمام: | edsarx.2308.14857 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.109.034024 |
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