Extended superscaling with two-particle emission in electron and neutrino scattering Martínez Consentino, Víctor Leopoldo Amaro Soriano, José Enrique Rodríguez Casalé, Paloma Ruiz Simó, Ignacio Luis This work is supported by Grant No. PID2020–114767GB-I00 funded by MCIN/AEI/10.13039/501100011033; FEDER/Junta de Andalucia-Consejeria de Transformacion Economica, Industria, Conocimiento y Universidades/A-FQM-390-UGR20; and Junta de Andalucia (Grant No. FQM-225). An extended superscaling analysis of quasielastic electron-scattering data is proposed by parametrizing the scaling function as the sum of a symmetric function corresponding to the emission of a single particle plus a contribution from the phase space of two-particle emission. The phase space of two-particle emission (2p2h) is multiplied by a q-dependent parameter that has been fitted to describe the tail behavior of the scaling function. This approach allows for an alternative description of the quasielastic electron scattering data, incorporating the contributions from both single-particle and two-particle emission processes induced by the one-body current and explaining the asymmetry of the scaling function. In a factorized schematic model based on the independent-pair approximation, the 2p2h parameter is related to the high-momentum distribution of the pair averaged over 2p2h excitations. However, in the phenomenological fitting approach undertaken here, this coefficient includes other contributions such as interference with two-body currents and effects of the final-state interactions. We present predictions for the inclusive two-nucleon emission cross section induced by electrons and neutrinos. 2023-09-13T07:06:05Z 2023-09-13T07:06:05Z 2023-07-28 journal article V.L. Martínez Consentino et al. Extended superscaling with two-particle emission in electron and neutrino scattering. Phys. Rev. D 108, 013007. [DOI: 10.1103/PhysRevD.108.013007] https://hdl.handle.net/10481/84377 10.1103/PhysRevD.108.013007 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional American Physical Society