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Title: Probing the Flavor Dependence of Proton's Light-Quark Sea in the SeaQuest Experiment

Abstract

Surprisingly large flavor asymmetry of the light-quark sea in the proton was reported in deep-inelastic scattering and Drell-Yan experiments. The Bjorken-$x$ dependence of the $$\bar{d}/\bar{u}$$ ratio extracted from the Fermilab E866 experiment also revealed an intriguing drop at the highest values of $x$. The Fermilab E906/SeaQuest experiment was designed to measure $$\bar{d}/\bar{u}$$ with improved accuracy at high Bjorken-$x$. By detecting high-mass dimuon events produced in the interaction of 120 GeV proton beam with liquid hydrogen (LH$$_2$$) and deuterium (LD$$_2$$) targets, the SeaQuest experiment probes the $$\bar{d}/\bar{u}$$ ratio up to $$x \approx 0.45$$. Data collection has been completed and we report the status of data analysis for SeaQuest. Two different methods for extracting the LD$$_2$$/LH$$_2$$ Drell-Yan cross section ratios for $$0.1\leq x\leq 0.45$$ are discussed. These ratios are compared with calculations using various PDFs.

Authors:
 [1]
  1. Illinois U., Urbana
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1568867
Report Number(s):
arXiv:1908.00040; FERMILAB-CONF-19-488-E
oai:inspirehep.net:1747533
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Journal Name:
PoS
Additional Journal Information:
Journal Volume: DIS2019; Conference: 27th International Workshop on Deep Inelastic Scattering and Related Subjects, Torino, Italy, 04/08-04/12/2019
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Dove, Jason. Probing the Flavor Dependence of Proton's Light-Quark Sea in the SeaQuest Experiment. United States: N. p., 2019. Web. doi:10.22323/1.352.0011.
Dove, Jason. Probing the Flavor Dependence of Proton's Light-Quark Sea in the SeaQuest Experiment. United States. doi:10.22323/1.352.0011.
Dove, Jason. Mon . "Probing the Flavor Dependence of Proton's Light-Quark Sea in the SeaQuest Experiment". United States. doi:10.22323/1.352.0011. https://www.osti.gov/servlets/purl/1568867.
@article{osti_1568867,
title = {Probing the Flavor Dependence of Proton's Light-Quark Sea in the SeaQuest Experiment},
author = {Dove, Jason},
abstractNote = {Surprisingly large flavor asymmetry of the light-quark sea in the proton was reported in deep-inelastic scattering and Drell-Yan experiments. The Bjorken-$x$ dependence of the $\bar{d}/\bar{u}$ ratio extracted from the Fermilab E866 experiment also revealed an intriguing drop at the highest values of $x$. The Fermilab E906/SeaQuest experiment was designed to measure $\bar{d}/\bar{u}$ with improved accuracy at high Bjorken-$x$. By detecting high-mass dimuon events produced in the interaction of 120 GeV proton beam with liquid hydrogen (LH$_2$) and deuterium (LD$_2$) targets, the SeaQuest experiment probes the $\bar{d}/\bar{u}$ ratio up to $x \approx 0.45$. Data collection has been completed and we report the status of data analysis for SeaQuest. Two different methods for extracting the LD$_2$/LH$_2$ Drell-Yan cross section ratios for $0.1\leq x\leq 0.45$ are discussed. These ratios are compared with calculations using various PDFs.},
doi = {10.22323/1.352.0011},
journal = {PoS},
number = ,
volume = DIS2019,
place = {United States},
year = {2019},
month = {7}
}

Conference:
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