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 (7)

• Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2
• Determination of the pion charge form factor for Q^2=0.60-1.60 GeV^2
• Low lying $qqqq\bar{q}$ states in the baryon spectrum
• Baryon Form Factors of Relativistic Constituent-Quark Models
• Charge Form Factors of Quark-Model Pions II
• Scaling of Hadronic Form Factors in Point Form Kinematics
• The Role of 5-quark Components on the Nucleon Form Factors

Cited by in corpus (3)

• Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor
• RQM description of the charge form factor of the pion and its asymptotic behavior
• RQM description of PS meson form factors, constraints from space-time translations, and underlying dynamics