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Comparing proton momentum distributions in A=3D2 and 3 nuclei via H-2 H-3 and He-3 (e,e ' p) measurements

Author:
Cruz-Torres, R.  Li, S.  Hauenstein, F.  Schmidt, A.  Nguyen, D.  Abrams, D.  Albataineh, H.  Alsalmi, S.  Androic, D.  Aniol, K.  Armstrong, W.  Arrington, J.  Atac, H.  Averett, T.  Gayoso, C. Ayerbe  Bai, X.  Bane, J.  Barcus, S.  Beck, A.  Bellini, V  Bhatt, H.  Bhetuwal, D.  Biswas, D.  Blyth, D.  Boeglin, W.  Bulumulla, D.  Camsonne, A.  Castellanos, J.  Chen, J-P  Cohen, E. O.  Covrig, S.  Craycraft, K.  Dongwi, B.  Duer, M.  Duran, B.  Dutta, D.  Fuchey, E.  Gal, C.  Gautam, T. N.  Gilad, S.  Gnanvo, K.  Gogami, T.  Gomez, J.  Gu, C.  Habarakada, A.  Hague, T.  Hansen, O.  Hattawy, M.  Hen, O.  Higinbotham, D. W.  Hughes, E.  Hyde, C.  Ibrahim, H.  Jian, S.  Joosten, S.  Karki, A.  Karki, B.  Katramatou, A. T.  Keppel, C.  Khachatryan, M.  Khachatryan, V  Khanal, A.  King, D.  King, P.  Korover, I  Kutz, T.  Lashley-Colthirst, N.  Laskaris, G.  Li, W.  Liu, H.  Liyanage, N.  Lonardoni, D.  Machleidt, R.  Marcucci, L. E.  Markowitz, R.  McClellan, R. E.  Meekins, D.  Beck, S. Mey-Tal  Meziani, Z-E  Michaels, R.  Mihovilovic, M.  Nelyubin, V  Nuruzzaman, N.  Nycz, M.  Obrecht, R.  Olson, M.  Ou, L.  Owen, V  Pandey, B.  Pandey, V  Papadopoulou, A.  Park, S.  Patsyuk, M.  Paul, S.  Petratos, G. G.  Piasetzky, E.  Pomatsalyuk, R.  Premathilake, S.  Puckett, A. J. R.  Punjabi, V  Ransome, R.  Rashad, M. N. H.  Reimer, P. E.  Riordan, S.  Roche, J.  Sammarruca, F.  Santiesteban, N.  Sawatzky, B.  Segarra, E. P.  Schmookler, B.  Shahinyan, A.  Sirca, S.  Sparveris, N.  Su, T.  Suleiman, R.  Szumila-Vance, H.  Tadepalli, A. S.  Tang, L.  Tireman, W.  Tortorici, F.  Urciuoli, G.  Viviani, M.  Weinstein, L. B.  Wojtsekhowski, B.  Wood, S.  Ye, Z. H.  Ye, Z. Y.  Zhang, J.  


Journal:
PHYSICS LETTERS B


Issue Date:
2019


Abstract(summary):

We report the first measurement of the (e, e'p) reaction cross-section ratios for Helium-3 (He-3), Tritium (H-3), and Deuterium (d). The measurement covered a missing momentum range of 40 <=3D p(miss) <=3D 550 MeV/c, at large momentum transfer (< Q(2)> approximate to 1.9 (GeV/c)(2)) and x(B) > 1, which minimized contributions from non quasi-elastic (QE) reaction mechanisms. The data is compared with plane-wave impulse approximation (PWIA) calculations using realistic spectral functions and momentum distributions. The measured and PWIA-calculated cross-section ratios for He-3/d and H-3/d extend to just above the typical nucleon Fermi-momentum (k(F) approximate to 250 MeV/c) and differ from each other by similar to 20%, while for He-3/H-3 they agree within the measurement accuracy of about 3%. At momenta above k(F), the measured He-3/H-3 ratios differ from the calculation by 20% - 50%. Final state interaction (FSI) calculations using the generalized Eikonal Approximation indicate that FSI should change the He-3/H-3 cross-section ratio for this measurement by less than 5%. If these calculations are correct, then the differences at large missing momenta between the He-3/H-3 experimental and calculated ratios could be due to the underlying NN interaction, and thus could provide new constraints on the previously loosely-constrained short-distance parts of the NN interaction. (C) 2019 The Author(s). Published by Elsevier B.V.


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