First analysis of world polarized DIS data with small-$x$ helicity evolution
| Title: | First analysis of world polarized DIS data with small-$x$ helicity evolution |
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| Authors: | Adamiak, Daniel, Kovchegov, Yuri V., Melnitchouk, W., Pitonyak, Daniel, Sato, Nobuo, Sievert, Matthew D. |
| Source: | Phys. Rev. D 104, 031501 (2021) |
| Publication Year: | 2021 |
| Collection: | High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| Subject Terms: | High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Experiment, Nuclear Theory |
| More Details: | We present a Monte Carlo based analysis of the combined world data on polarized lepton-nucleon deep-inelastic scattering at small Bjorken $x$ within the polarized quark dipole formalism. We show for the first time that double-spin asymmetries at $x<0.1$ can be successfully described using only small-$x$ evolution derived from first-principles QCD, allowing predictions to be made for the $g_1$ structure function at much smaller $x$. Anticipating future data from the Electron-Ion Collider, we assess the impact of electromagnetic and parity-violating polarization asymmetries on $g_1$ and demonstrate an extraction of the individual flavor helicity PDFs at small $x$. Comment: 7 pages, 5 figures; v2: Discussion extended, typos corrected, data set expanded, figure added. To appear in Phys. Rev. D |
| Document Type: | Working Paper |
| DOI: | 10.1103/PhysRevD.104.L031501 |
| Access URL: | http://arxiv.org/abs/2102.06159 |
| Accession Number: | edsarx.2102.06159 |
| Database: | arXiv |
| DOI: | 10.1103/PhysRevD.104.L031501 |
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