STI Publications - View Publication Form #19255
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Publication Information
| Title | Global analysis of polarized DIS & SIDIS data with improved small-x helicity evolution | ||||
| Abstract | We analyze the world polarized deep-inelastic scattering (DIS) and semi-inclusive DIS (SIDIS) data at low values of $x < 0.1$, using small-$x$ evolution equations for the flavor singlet and nonsinglet helicity parton distribution functions (hPDFs). The hPDFs for quarks, antiquarks, and gluons are extracted and evolved to lower values of $x$ to make predictions for the future Electron-Ion Collider (EIC). We improve on our earlier work by employing the more realistic large-$N_c\, \& N_f$ limit of the revised small-$x$ helicity evolution, and incorporating running coupling corrections along with SIDIS data into the fit. We find an anti-correlation between the signs of the gluon and flavor-singlet quark hPDFs. While the existing low-$x$ polarized DIS and SIDIS data are insufficient to constrain the initial conditions for the polarized dipole amplitudes in the helicity evolution equations, future EIC data will allow more precise predictions for hPDFs and the $g_1$ structure function for $x$ | ||||
| Author(s) | D. Adamiak, N. Baldonado, Y. Kovchegov, W. Melnitchouk, D. Pitonyak, N. Sato, M. Sievert, A. Tarasov, Y. Tawabutr | ||||
| Publication Date | December 2023 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | Yes | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review D |
| Refereed | Yes |
| Volume | 108 |
| Issue | |
| Page(s) | 114007 |
Attachments/Datasets/DOI Link
| Document(s) |
JAM__small_x_long_paper1.pdf
(STI Document)
PhysRevD.108.114007.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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