出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We use the recently measured accurate BaBaR data on the modulus of the pion electromagnetic form factor, Fp (t), up to an energy of 3 GeV, the I = 1 P-wave phase of the pp scattering amplitude up to the w −p threshold, the pion charge radius known from Chiral Perturbation Theory, and the recently measured JLAB value of Fp in the spacelike region at t = −2.45GeV2 as inputs in a formalism that leads to bounds on Fp in the intermediate spacelike region. We compare our constraints with experimental data and with perturbative QCD along with the results of several theoretical models for the non-perturbative contributions proposed in the literature.
