Probing the Flavor Dependence of Proton's Light-Quark Sea in the SeaQuest Experiment
- Illinois U., Urbana
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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1568867
- Report Number(s):
- arXiv:1908.00040; FERMILAB-CONF-19-488-E; oai:inspirehep.net:1747533
- Journal Information:
- PoS, Vol. 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
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