Scaling within the spectral function approach

Sobczyk, J. E.; Rocco, N.; Lovato, A.; Nieves, J.

doi:10.1103/PhysRevC.97.035506

Title: Scaling within the spectral function approach

Journal Article · 28 March 2018 · Physical Review C

DOI: https://doi.org/10.1103/PhysRevC.97.035506 · OSTI ID:1466302

Sobczyk, J. E. ^[1]; Rocco, N. ^[2]; Lovato, A. ^[3]; Nieves, J. ^[1]

Centro Mixto CSIC-Univ. de Valencia, Valencia (Spain). Inst. de Física Corpuscular (IFIC), Inst. de Investigación de Paterna
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
INFN-TIFPA Trento Inst. of Fundamental Physics and Applications, Trento (Italy); Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division

Scaling features of the nuclear electromagnetic response functions unveil aspects of nuclear dynamics that are crucial for interpreting neutrino-and electron-scattering data. In the large momentum-transfer regime, the nucleon-density response function defines a universal scaling function, which is independent of the nature of the probe. In this work, we analyze the nucleon-density response function of ¹²C, neglecting collective excitations. We employ particle and hole spectral functions obtained within two distinct many-body methods, both widely used to describe electroweak reactions in nuclei. We show that the two approaches provide compatible nucleon-density scaling functions that for large momentum transfers satisfy first-kind scaling. Both methods yield scaling functions characterized by an asymmetric shape, although less pronounced than that of experimental scaling functions. Finally, this asymmetry, only mildly affected by final state interactions, is mostly due to nucleon-nucleon correlations, encoded in the continuum component of the hole spectral function.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Spanish Ministerio de Economia y Competitividad (MINECO); Consiglio Nazionale delle Ricerche (CNR); USDOE

Grant/Contract Number:: AC02-06CH11357; FIS2014-51948-C2-1-P; FIS2014-51948-C2-2-P; FIS2017-84038-C2-1-P; SEV-2014-0398

OSTI ID:: 1466302

Alternate ID(s):: OSTI ID: 1430155

Journal Information:: Physical Review C, Vol. 97, Issue 3; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Realistic spectral function model for charged-current quasielastic-like neutrino and antineutrino scattering cross sections on C 12 Ivanov, M. V.; Antonov, A. N.; Megias, G. D. Physical Review C, Vol. 99, Issue 1 https://doi.org/10.1103/physrevc.99.014610	journal	January 2019
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