Comparative study of nonperturbative heavy quarks in the nucleon
Abstract
We perform an analysis of the role of nonperturbative (or intrinsic) charm in the nucleon. Charm is generated nonperturbatively through Fock state expansions of the nucleon wave function to include five-quark virtual states involving charmed mesons and baryons. We consider contributions from a variety of charmed meson-baryon states and find surprisingly dominant effects from the D*0Λc+ configuration. Particular attention is paid to the existence and persistence of high- x structure for intrinsic charm, and the x dependence of the c - c asymmetry predicted in meson-baryon models. We also discuss efforts to constrain intrinsic charm via a forthcoming global QCD analysis, and the possibility of extracting intrinsic strangeness using a similar approach.
Research supported by NSF grant NSF-PHY-1205019 and DOE Office of Science grants DE-FG02-87ER40365, DE-AC05-06OR23177.- Publication:
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APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2013
- Bibcode:
- 2013APS..DNP.JC003H