Sea-quark effects in the pion charge form factor

Abstract

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.

14 pages

References in corpus (1)

• The Role of 5-quark Components on the Nucleon Form Factors

Cited by in corpus (1)

• Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor