Gravitational p → ∆+ transition form factors in chiral perturbation theory
H. Alharazin, Bao-Dong Sun, E. Epelbaum, J. Gegelia, Ulf-G. Meißner
Abstract
A bstract The gravitational form factors of the transition from the proton to the ∆ + resonance are calculated to leading one-loop order using a manifestly Lorentz-invariant formulation of chiral perturbation theory. We take into account the leading electromagnetic and strong isospin-violating effects. The loop contributions to the transition form factors are found to be free of power-counting violating pieces, which is consistent with the absence of tree-level diagrams at the considered order. In this sense, our results can be regarded as predictions of chiral perturbation theory.
Topics & Concepts
PhysicsGravitationChiral perturbation theoryTheoretical physicsPerturbation (astronomy)Mathematical physicsPerturbation theory (quantum mechanics)Quantum electrodynamicsClassical mechanicsParticle physicsQuantum mechanicsQuantum chromodynamicsQuantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesHigh-Energy Particle Collisions Research