The He-3 transverse electron scattering response function R-T(q, omega) is calculated in the quasi-elastic peak region and beyond for momentum transfers q = 500, 600 and 700 MeV/c. Distinct from our previous work for these kinematics where we included meson exchange currents and relativistic corrections we now additionally include Delta isobar currents (Delta-IC). The Delta-IC contribution increases the quasi-elastic peak height by about 5% and leads to an excellent agreement with experimental data in the whole peak region. In addition it is shown that effects due to the three-nucleon force largely cancel those due to the Delta-IC in the peak region. Finally, we have found that Delta-IC are important for three-body break-up reactions in the so-called dip region. This could explain why in a previous study of such a reaction, where Delta degrees of freedom were not included, no agreement between experimental and theoretical results could be obtained. (C) 2011 Elsevier B.V. All rights reserved.
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Titolo: | Transverse electron scattering response function of 3He in the quasi-elastic peak region and beyond with Delta isobar degrees of freedom | |
Autori: | Yuan, Lu Ping; Leidemann, Winfried; V. D., Efros; Orlandini, Giuseppina; E. L., Tomusiak | |
Autori Unitn: | ||
Titolo del periodico: | PHYSICS LETTERS. SECTION B | |
Anno di pubblicazione: | 2011 | |
Codice identificativo Scopus: | 2-s2.0-81255151159 | |
Codice identificativo WOS: | WOS:000298129000016 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physletb.2011.10.066 | |
Handle: | http://hdl.handle.net/11572/88850 | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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2011_trensverse_PLB.pdf | Versione editoriale (Publisher’s layout) | Tutti i diritti riservati (All rights reserved) | Administrator |