Publications
Publication Information
| Title | Strange quark suppression from a simultaneous Monte Carlo analysis of parton distributions and fragmentation functions |
| Authors | Nobuo Sato, Carlota Andres Casas, Jacob Ethier, Wolodymyr Melnitchouk |
| JLAB number | JLAB-THY-19-2927 |
| LANL number | arXiv:1905.03788 |
| Other number | DOE/OR/23177-4690 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review D Volume 101 Page(s) 074020 Refereed | |
| Publication Abstract: | We perform the first simultaneous extraction of unpolarized parton distributions and fragmentation functions from a Monte Carlo analysis of inclusive and semi-inclusive deep-inelastic scattering, Drell-Yan lepton-pair production, and single-inclusive $e^+ e^-$ annihilation data. We use data resampling techniques to thoroughly explore the Bayesian posterior distribution of the extracted quantum correlation functions, and use $k$-means clustering on the parameter samples to identify the configurations that give the best description across all reactions. Inclusion of the semi-inclusive data reveals a strong suppression of the strange quark distribution at parton momentum fractions $x \gtrsim 0.01$, in contrast with the ATLAS observation of enhanced strangeness in $W^\pm$ and $Z$ production at the LHC. The simultaneous analysis reveals significant correlations between the strange quark density and the strange $\to$ kaon fragmentation function needed to describe semi-inclusive $K^\pm$ production data from COMPASS and inclusive $K^\pm$ spectra in $e^+ e^-$ annihilation from ALEPH and SLD, as well as between the strange and light antiquark densities in the proton. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.101.074020 |
| Accepted Manuscript: | PhysRevD.101.074020.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |