https://scholars.lib.ntu.edu.tw/handle/123456789/572123
標題: | Strange quark suppression from a simultaneous Monte Carlo analysis of parton distributions and fragmentation functions STRANGE QUARK SUPPRESSION from A SIMULTANEOUS ... SATO, ANDRES, ETHIER, and MELNITCHOUK | 作者: | Sato N Andres C Ethier J.J Melnitchouk W (Jefferson Lab Angular Momentum (JAM) Collaboration) NOBUO SATO |
公開日期: | 2020 | 卷: | 101 | 期: | 7 | 來源出版物: | Physical Review D | 摘要: | 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 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 0.01, in contrast with the ATLAS observation of enhanced strangeness in W± and Z production at the LHC. Our study reveals significant correlations between the strange quark density and the strange → kaon fragmentation function needed to simultaneously describe semi-inclusive K± production data from COMPASS and inclusive K± spectra in e+e- annihilation from ALEPH and SLD, as well as between the strange and light antiquark densities in the proton. ? 2020 authors. Published by the American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85084612430&doi=10.1103%2fPhysRevD.101.074020&partnerID=40&md5=64c9e33f92d5a150cca525f7a1bdd8a2 https://scholars.lib.ntu.edu.tw/handle/123456789/572123 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.101.074020 |
顯示於: | 數學系 |
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