TY - JOUR
T1 - Comparing proton momentum distributions in A = 2 and 3 nuclei via 2H 3H and 3He (e,e′p) measurements
AU - Jefferson Lab Hall A Tritium Collaboration
AU - Cruz-Torres, R.
AU - Li, S.
AU - Hauenstein, F.
AU - Schmidt, A.
AU - Nguyen, D.
AU - Abrams, D.
AU - Albataineh, H.
AU - Alsalmi, S.
AU - Androic, D.
AU - Aniol, K.
AU - Armstrong, W.
AU - Arrington, J.
AU - Atac, H.
AU - Averett, T.
AU - Ayerbe Gayoso, C.
AU - Bai, X.
AU - Bane, J.
AU - Barcus, S.
AU - Beck, A.
AU - Bellini, V.
AU - Bhatt, H.
AU - Bhetuwal, D.
AU - Biswas, D.
AU - Blyth, D.
AU - Boeglin, W.
AU - Bulumulla, D.
AU - Camsonne, A.
AU - Castellanos, J.
AU - Chen, J. P.
AU - Cohen, E. O.
AU - Covrig, S.
AU - Craycraft, K.
AU - Dongwi, B.
AU - Duer, M.
AU - Duran, B.
AU - Dutta, D.
AU - Fuchey, E.
AU - Gal, C.
AU - Gautam, T. N.
AU - Gilad, S.
AU - Gnanvo, K.
AU - Gogami, T.
AU - Gomez, J.
AU - Gu, C.
AU - Habarakada, A.
AU - Hague, T.
AU - Hansen, O.
AU - Hattawy, M.
AU - Hen, O.
AU - Korover, I.
N1 - Publisher Copyright:
© 2019 The Author(s)
PY - 2019/10/10
Y1 - 2019/10/10
N2 - We report the first measurement of the (e,e′p) reaction cross-section ratios for Helium-3 (He3), Tritium (H3), and Deuterium (d). The measurement covered a missing momentum range of 40≤pmiss≤550MeV/c, at large momentum transfer (〈Q2〉≈1.9 (GeV/c)2) and xB>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 He3/d and H3/d extend to just above the typical nucleon Fermi-momentum (kF≈250 MeV/c) and differ from each other by ∼20%, while for He3/H3 they agree within the measurement accuracy of about 3%. At momenta above kF, the measured He3/H3 ratios differ from the calculation by 20%−50%. Final state interaction (FSI) calculations using the generalized Eikonal Approximation indicate that FSI should change the He3/H3 cross-section ratio for this measurement by less than 5%. If these calculations are correct, then the differences at large missing momenta between the He3/H3 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.
AB - We report the first measurement of the (e,e′p) reaction cross-section ratios for Helium-3 (He3), Tritium (H3), and Deuterium (d). The measurement covered a missing momentum range of 40≤pmiss≤550MeV/c, at large momentum transfer (〈Q2〉≈1.9 (GeV/c)2) and xB>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 He3/d and H3/d extend to just above the typical nucleon Fermi-momentum (kF≈250 MeV/c) and differ from each other by ∼20%, while for He3/H3 they agree within the measurement accuracy of about 3%. At momenta above kF, the measured He3/H3 ratios differ from the calculation by 20%−50%. Final state interaction (FSI) calculations using the generalized Eikonal Approximation indicate that FSI should change the He3/H3 cross-section ratio for this measurement by less than 5%. If these calculations are correct, then the differences at large missing momenta between the He3/H3 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.
UR - http://www.scopus.com/inward/record.url?scp=85071610874&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2019.134890
DO - 10.1016/j.physletb.2019.134890
M3 - Article
AN - SCOPUS:85071610874
SN - 0370-2693
VL - 797
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 134890
ER -