First Lattice Study of the $N$-$P_{11}(1440)$ Transition Form Factors

Abstract

Experiments at Jefferson Laboratory, MIT-Bates, LEGS, Mainz, Bonn, GRAAL, and Spring-8 offer new opportunities to understand in detail how nucleon resonance ($N^{\ast }$) properties emerge from the nonperturbative aspects of QCD. Preliminary data from CLAS collaboration, which cover a large range of photon virtuality $Q^2$ show interesting behavior with respect to $Q^2$ dependence: in the region $Q^2\le 1.5{GeV}^2$, both the transverse amplitude, $A_{1/2}(Q^2)$, and the longitudinal amplitude, $S_{1/2}(Q^2)$, decrease rapidly. In this work, we attempt to use first-principles lattice QCD (for the first time) to provide a model-independent study of the Roper-nucleon transition form factor.

4 pages, 2 figures, double column

References in corpus (5)

• Nucleon Electromagnetic Form Factors
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Excited hadrons on the lattice: Baryons
• Electroexcitation of the Roper resonance in the relativistic quark models
• Study of nucleon resonances with electromagnetic interactions

Cited by in corpus (9)

• Baryons as relativistic three-quark bound states
• First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
• A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$
• Transition form factors and helicity amplitudes for electroexcitation of negative- and positive parity nucleon resonances in a light-front quark model
• Constraining beyond the Standard Model nucleon isovector charges
• Global Data-Driven Determination of Baryon Transition Form Factors
• Octet negative parity to octet positive parity electromagnetic transitions in light cone QCD
• Meson Production and Baryon Resonances at CLAS
• Odd-Parity Nucleon Electromagnetic Transitions in Lattice QCD