Three-nucleon systems, Poincaré covariance and the EMC Effect

Name: Three-nucleon systems, Poincaré covariance and the EMC Effect
Start: 2022-03-16T13:30:00+00:00
End: 2022-03-16T15:00:00+00:00
Location: No location set

by Sergio Scopetta (INFN, Perugia)

Wednesday Mar 16, 2022, 1:30 PM → 3:00 PM GMT

Description

In collaboration with: Emanuele Pace (Roma2), Matteo Rinaldi (Perugia),
Giovanni Salme (INFN Roma), Rocco Alessandro (Roma2), Alessio Del Dotto
(ENEA), Gabriele Perna (Perugia)

Abstract:
A rigorous Light-Front formalism for the description of hadronic three-body systems in valence approximation will be reviewed [1,2]. The application to the analysis of electron deep inelastic scattering (DIS) on nuclear  targets,  in   the  valence  region  and  in the Bjorken  limit,  will be  reported  [3,4]. The main theoretical ingredient is the LF  nuclear spectral function. The  approach  preserves macroscopic locality,  as well as number of particles and momentum sum rules at the same time. The   proposed  scheme  is used to evaluate realistically the  structure functions  of the 3He  nucleus,  very  relevant for  phenomenological studies in the present experimental scenario.  At  variance with previous light-front estimates for heavy nuclei, our  analysis predicts a sizeable binding effect, in fair agreement with  available data of the European Muon Collaboration (EMC) effect.  The  results are stable against the use of different parametrizations of  the nucleon DIS structure functions and that of nuclear two- and  three-body potentials. The extension of our approach to the 4He nucleus is straightforward, although numerically challenging.

[1] "Light-Front spin-dependent Spectral Function and Nucleon Momentum  Distributions for a Three-Body System"
by A. Del Dotto, E. Pace, G. Salme, S. Scopetta
Phys.Rev.C 95 (2017) 1, 014001 and arXiv:1609.03804 [nucl-th]

[2] "Light-Front Transverse Momentum Distributions for J=1/2
Hadronic Systems in Valence Approximation",
by R. Alessandro, A. Del Dotto, E. Pace, G. Perna,
G. Salme, S. Scopetta,  arXiv:2107.10187 and Phys.Rev.C 104 (2021) 6, 065204

[3] "EMC effect, few-nucleon systems and Poincare covariance",
by E. Pace, M. Rinaldi, G. Salme, S. Scopetta,
arXiv:2004.05877, and Phys. Scr. 95, 064008

[4] E. Pace, M. Rinaldi, G. Salme, S. Scopetta, arXiv 2022, in preparation

Webinar at https://us02web.zoom.us/j/81572103194?pwd=eE1QVWZFc1hWbWszZ2N0RW1iWHFBZz09