Electromagnetic transition amplitude for Roper resonance from holographic QCD

Abstract

The Roper resonance, the first excited state of the nucleon, Is one of the best-established baryon resonances. Yet, its properties have not been consistently explained by effective models of QCD, such as the non-relativistic quark model. In this letter, we propose an alternative approach in the Sakai-Sugimoto model that is one of the holographic models of QCD. In particular, we analyze the helicity amplitude of the electromagnetic transitions at the leading of 't~Hooft coupling $1/\lambda$. The model incorporates baryon structure at short distance by non-linear mesons surrounded by meson clouds at long distance. We demonstrate that the recently observed data by CLAS are explained in the present approach.

5 pages, 2 figures

References in corpus (6)

• A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$
• Chiral currents and static properties of nucleons in holographic QCD
• Relativistic corrections to decays of heavy baryons in the quark model
• Roper-like resonances with various flavor contents and their two-pion emission decays
• Decay properties of Roper resonance in the holographic QCD
• Decay properties of $N(1535)$ in the holographic QCD

Cited by in corpus (3)

• Electromagnetic Transition Form Factors of Baryon Resonances
• Gravitational form factors of pion from top-down holographic QCD
• Scalar-glueball-mediated scale-anomaly dominance of the confining pressure of the pion in holographic QCD