Flavor Asymmetry of the Nucleon Sea: Unambiguous Role of Goldstone Bosons
Conference
·
OSTI ID:801499
We consider the non-analytic behavior of {bar d}(x)-{bar u}(x) and s(x)-{bar s}(x) as a function of quark mass. Using the fact that such non-analytic behavior is a unique characteristic of Goldstone boson loops, we establish two features of the nucleon sea in a model independent fashion. First, we establish the unambiguous role of the pion cloud of the nucleon in the observed excess of {bar d} over {bar u} quarks in the proton. Second, we establish that s(x) cannot in general be equal to {bar s}(x).
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 801499
- Report Number(s):
- JLAB-THY-00-50; DOE/ER/40150-2182
- Country of Publication:
- United States
- Language:
- English
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