Sea-quark effects in the pion charge form factor

Details Sea-quark effects in the pion charge form factor Sea-quark effects in the pion charge form factor

2007-09-04

arxiv.org/abs/0709.0369v1

Phys.Rev.C77:045207,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages

Scientific paper

10.1103/PhysRevC.77.045207

It is shown that the data on the pion charge form factor admit the possibility for a substantial sea-quark components in the pion wave function. If the charge form factor is calculated with instant form kinematics in a constituent quark model that is extended to include explicit $(q\bar q)^2$ components in the pion wave function, that component will give the dominant contribution to the calculated $\pi^+$ charge form factor at large values of momentum transfer. The present experimental values $Q^2$ can be described well with $(q\bar q)^2$ component admixtures of up to 50%. The sensitivity of the calculated $\pi^+$ charge form factor to whether one of the quarks or one of the antiquarks is taken to be in the P-state is small.

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