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2024 · Physical Review C

Magnetic structure of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>A</mml:mi> <mml:mo>≤</mml:mo> <mml:mn>10</mml:mn> </mml:mrow> </mml:math> nuclei using the Norfolk nuclear models with quantum Monte Carlo methods

G. Chambers-Wall, Alex Gnech, G. B. King, Saori Pastore, M. Piarulli, R. Schiavilla, R. B. Wiringa

This paper presents a new detailed study of magnetic moments and form factors of nuclei with mass number $A$ up to 10, based on $a\phantom{\rule{0}{0ex}}b$-$i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ approaches and chiral effective field theory. The results of quantum Monte Carlo calculations for elastic magnetic form factors show excellent agreement with experimental data out to momentum transfers $q\ensuremath{\approx}3$ fm${}^{\ensuremath{-}1}$. Benchmarking such electroweak current models against available data over a wide range of kinematics allows for accurate predictions, which are very important to disentangle signals of new physics from nuclear physics effects.

8 citations16 viewsFull text

DOI: 10.1103/physrevc.110.054316

1999 · Physical Review C

Out-of-plane measurements of the fifth response function of the exclusive electronuclear response

S. Dolfini, Ricardo Alarcón, H. Arenhövel, R. Beck, A. M. Bernstein, W. Bertozzi, W. Boeglin, S. Boffi, J. R. Comfort, D. Da…

The first measurements of ${f}_{\mathrm{LT}}^{\ensuremath{'}},$ known as the fifth response function, have been made for the ${}^{2}\mathrm{H}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}}p)$ and ${}^{12}\mathrm{C}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}}p)$ reactions. This response is directly related to the imaginary part of the interference between the transverse and longitudinal nuclear electromagnetic currents. Its observation requires longitudinally polarized electron beams and out-of-plane detection, the latter made possible by the newly developed out-of-plane spectrometer system. The initial measurements were made by using a 560-MeV polarized electron beam and quasielastic kinematics at ${Q}^{2}=3.3 {\mathrm{fm}}^{\ensuremath{-}2}.$ The development of the methodology for out-of-plane physics, and the analysis of the data from the initial experiments are described in detail. The measured fifth response and the related asymmetry in the coincidence cross section are in agreement, albeit with large statistical errors, with the theoretical predictions. Future extensions of the out-of-plane program are also discussed.

17 citations11 views

DOI: 10.1103/physrevc.60.064622