Meson-Exchange Currents and Quasielastic Antineutrino Cross Sections in the Superscaling Approximation

J. E. Amaro, M. B. Barbaro, J. A. Caballero, and T. W. Donnelly

Phys. Rev. Lett. 108, 152501 – Published 12 April 2012

Abstract

We evaluate quasielastic double-differential antineutrino cross sections obtained in a phenomenological model based on the superscaling behavior of electron scattering data and estimate the contribution of the vector meson-exchange currents in the two-particle–two-hole sector. We show that the impact of meson-exchange currents for charge-changing antineutrino reactions is much larger than in the neutrino case.

Received 12 December 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.152501

Authors & Affiliations

J. E. Amaro

Departamento de Física Atómica, Molecular y Nuclear and Instituto Carlos I de Física Teorica y Computacional, Universidad de Granada, 18071 Granada, Spain

M. B. Barbaro

Dipartimento di Fisica Teorica, Università di Torino and INFN, Sezione di Torino, Via Pietro Giuria 1, 10125 Torino, Italy

J. A. Caballero

Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, 41080 Sevilla, Spain

T. W. Donnelly

Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA