학술논문
Comparing proton momentum distributions in A = 2 and 3 nuclei via 2H 3H and 3He (e,e′p) measurements
Document Type
article
Author
R. Cruz-Torres; S. Li; F. Hauenstein; A. Schmidt; D. Nguyen; D. Abrams; H. Albataineh; S. Alsalmi; D. Androic; K. Aniol; W. Armstrong; J. Arrington; H. Atac; T. Averett; C. Ayerbe Gayoso; X. Bai; J. Bane; S. Barcus; A. Beck; V. Bellini; H. Bhatt; D. Bhetuwal; D. Biswas; D. Blyth; W. Boeglin; D. Bulumulla; A. Camsonne; J. Castellanos; J.-P. Chen; E.O. Cohen; S. Covrig; K. Craycraft; B. Dongwi; M. Duer; B. Duran; D. Dutta; E. Fuchey; C. Gal; T.N. Gautam; S. Gilad; K. Gnanvo; T. Gogami; J. Gomez; C. Gu; A. Habarakada; T. Hague; O. Hansen; M. Hattawy; O. Hen; D.W. Higinbotham; E. Hughes; C. Hyde; H. Ibrahim; S. Jian; S. Joosten; A. Karki; B. Karki; A.T. Katramatou; C. Keppel; M. Khachatryan; V. Khachatryan; A. Khanal; D. King; P. King; I. Korover; T. Kutz; N. Lashley-Colthirst; G. Laskaris; W. Li; H. Liu; N. Liyanage; D. Lonardoni; R. Machleidt; L.E. Marcucci; P. Markowitz; R.E. McClellan; D. Meekins; S. Mey-Tal Beck; Z.-E. Meziani; R. Michaels; M. Mihovilovič; V. Nelyubin; N. Nuruzzaman; M. Nycz; R. Obrecht; M. Olson; L. Ou; V. Owen; B. Pandey; V. Pandey; A. Papadopoulou; S. Park; M. Patsyuk; S. Paul; G.G. Petratos; E. Piasetzky; R. Pomatsalyuk; S. Premathilake; A.J.R. Puckett; V. Punjabi; R. Ransome; M.N.H. Rashad; P.E. Reimer; S. Riordan; J. Roche; F. Sammarruca; N. Santiesteban; B. Sawatzky; E.P. Segarra; B. Schmookler; A. Shahinyan; S. Širca; N. Sparveris; T. Su; R. Suleiman; H. Szumila-Vance; A.S. Tadepalli; L. Tang; W. Tireman; F. Tortorici; G. Urciuoli; M. Viviani; L.B. Weinstein; B. Wojtsekhowski; S. Wood; Z.H. Ye; Z.Y. Ye; J. Zhang
Source
Physics Letters B, Vol 797, Iss , Pp - (2019)
Subject
Language
English
ISSN
0370-2693
Abstract
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.