Probing The Deuteron At Very Large Internal Momenta

Carlos Yero,D Abrams, Z Ahmed,A Ahmidouch, B Aljawrneh,S Alsalmi,R Ambrose, W Armstrong,A Asaturyan, K Assumin-Gyimah,C Ayerbe Gayoso, A Bandari,J Bane, S Basnet,V V Berdnikov, J Bericic,H Bhatt,D Bhetuwal,D Biswas, W U Boeglin,P Bosted,E Brash,M H S Bukhari,H Chen, J P Chen,M Chen,M E Christy, S Covrig, K Craycraft,S Danagoulian,D Day,M Diefenthaler, M Dlamini,J Dunne, B Duran,D Dutta, R Ent, R Evans, H Fenker,N Fomin,E Fuchey,D Gaskell,T N Gautam,F A Gonzalez,J O Hansen, F Hauenstein,A V Hernandez,T Horn,G M Huber,M K Jones,S Joosten,M L Kabir,A Karki,C E Keppel,A Khanal,P King, E Kinney,N Lashley-Colthirst,S Li,W B Li,A H Liyanage, D J Mack,S P Malace, J Matter,D Meekins,R Michaels,A Mkrtchyan,H Mkrtchyan, S J Nazeer,S Nanda, G Niculescu, M Niculescu,D Nguyen,N Nuruzzaman,B Pandey,S Park, C F Perdrisat,E Pooser, M Rehfuss,J Reinhold, B Sawatzky,G R Smith, A Sun, H Szumila-Vance, V Tadevosyan, S A Wood,J Zhang

PHYSICAL REVIEW LETTERS（2020）

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摘要

We measure H-2(e, e' p)n cross sections at 4-momentum transfers of Q(2) = 4.5 +/- 0.5 (GeV/c)(2) over a range of neutron recoil momenta p(r), reaching up to similar to 1.0 GeV/c. We obtain data at fixed neutron recoil angles theta(nq) = 35 degrees, 45 degrees, and 75 degrees with respect to the 3-momentum transfer (q)over-right-arrow. The new data agree well with previous data, which reached p(r) similar to 500 MeV/c. At theta(nq) = 35 degrees and 45 degrees, final state interactions, meson exchange currents, and isobar currents are suppressed and the plane wave impulse approximation provides the dominant cross section contribution. We compare the new data to recent theoretical calculations, where we observe a significant discrepancy for recoil momenta P-r > 700 MeV/c.

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