STI Publications - View Publication Form #17341
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Publication Information
| Title | Global QCD Analysis and Dark Photons | ||||
| Abstract | We perform a global QCD analysis of high energy scattering data within the JAM Monte Carlo framework, including a coupling to a dark photon that augments the standard model electroweak coupling via kinetic mixing with the $Z$ boson. We find a significant reduction in $\chi^2$ favoring the inclusion of a dark photon, with a statistical significance in excess of 7$\sigma$, while the resulting parton distribution functions are consistent with previous global analyses within uncertainties. The modifications to the theoretical predictions are spread across a wide range of $x$ and $Q^2$, with the largest improvement corresponding to neutral current data from HERA. The best fit gives a dark photon mass in the range 3--4~GeV, and upwards of 0.1 for the mixing parameter, $\epsilon$. | ||||
| Author(s) | N. Hunt-Smith, W. Melnitchouk, N. Sato, A. Thomas, X. Wang, M. J. White | ||||
| Publication Date | September 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 | Journal of High Energy Physics |
| Refereed | Yes |
| Volume | |
| Issue | |
| Page(s) | 96 |
Attachments/Datasets/DOI Link
| Document(s) |
Dark_Photon_in_JAM.pdf
(STI Document)
JHEP09(2023)096.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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