2024/10/23 by Pablo Sánchez-Puertas, E. Ruiz Arriola, Sanchez-Puertas, Pablo +1
Engineering · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2410.17804
openalex publication_date 2024/10/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
In this work, we employ a dispersion relation that allows to recover the electromagnetic form factor of the pion from its modulus along the unitarity cut. Unlike the standard dispersive approach, this method extends in a straightforward manner above the inelastic region, allowing us to obtain the form factor's phase, as well as its real and imaginary parts. As applications, we extract the P-wave ππ phase shift, the octet form factor, derive bounds in the spacelike region, and offer insights into the onset of perturbative QCD.