Pion cloud and sea quark flavor asymmetry in the impact parameter representation
| dc.creator | Strikman, M. | |
| dc.creator | Weiss, C. | |
| dc.date | 2008-11-21 | |
| dc.date.accessioned | 2026-07-07T13:03:08Z | |
| dc.date.available | 2026-07-07T13:03:08Z | |
| dc.description | We study large-distance contributions to the nucleon parton densities in the transverse coordinate (impact parameter) representation based on generalized parton distributions (GPDs). Chiral dynamics generates a distinct component of the partonic structure, located at momentum fractions x ~< M_pi/M_N and transverse distances b ~ 1/M_pi. We analyze the phenomenological "pion cloud" model of the flavor asymmetry dbar(x) - ubar(x) and quantify what fraction of the calculated asymmetry results from the universal large-distance region. Our findings indicate that a two-component picture of the nucleon's partonic structure, with a "core" antiquark distribution at b < b_core ~= 0.55 fm which vanishes at x -> 0 and the universal large-distance pion cloud, could naturally account for the x-dependence of the measured asymmetry. | |
| dc.description | 7 pages, 3 figures. To appear in proceedings of LIGHT CONE 2008 Relativistic Nuclear and Particle Physics, Mulhouse, France, July 7-11, 2008 | |
| dc.identifier | https://arxiv.org/abs/0811.3631 | |
| dc.identifier | http://arxiv.org/abs/0811.3631 | |
| dc.identifier | PoS LC2008:043,2008 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/226690 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Pion cloud and sea quark flavor asymmetry in the impact parameter representation | |
| dc.type | text |