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A comparison of forward and backward pp pair knockout in 3He(e,e'pp)n
Baghdasaryan H., Weinstein L.B., Laget J.M., Adhikari K.P., Aghasyan M. et al
Physical Review C 85 (2012) 064318 - http://hal.in2p3.fr/in2p3-00710931
Physique/Physique Nucléaire Expérimentale
A comparison of forward and backward pp pair knockout in 3He(e,e'pp)n
H. Baghdasaryan, L.B. Weinstein, J.M. Laget, K.P. Adhikari, M. Aghasyan, M.J. Amaryan, M. Anghinolfi, J. Ball, M. Battaglieri, A.S. Biselli, W.J. Briscoe, W.K. Brooks, V.D. Burkert, D.S. Carman, A. Celentano, S. Chandavar, G. Charles, P.L. Cole, M. Contalbrigo, V. Crede, A. D'Angelo, A. Daniel, N. Dashyan, E. De Sanctis, R. De Vita, C. Djalali, G.E. Dodge, D. Doughty, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, G. Fedotov, M.Y. Gabrielyan, N. Gevorgyan, G.P. Gilfoyle, K.L. Giovanetti, F.X. Girod, W. Gohn, R.W. Gothe, K.A. Griffioen, B. Guegan1, M. Guidal1, K. Hafidi, K. Hicks, C.E. Hyde, D.G. Ireland, B.S. Ishkhanov, D. Jenkins, H.S. Jo, K. Joo, M. Khandaker, P. Khetarpal, A. Kim, W. Kim, A. Kubarovsky, V. Kubarovsky, S.E. Kuhn, S.V. Kuleshov, N.D. Kvaltine, H.Y. Lu, I.J.D. Macgregor, B. Mckinnon, M. Mirazita, V. Mokeev, H. Moutarde, E. Munevar, S. Niccolai1, G. Niculescu, I. Niculescu, M. Osipenko, M. Paolone, L.L. Pappalardo, R. Paremuzyan, K. Park, S. Park, S. Pisano, S. Pozdniakov, S. Procureur, B.A. Raue, G. Ricco, D. Rimal, M. Ripani, G. Rosner, P. Rossi, M.S. Saini, N.A. Saylor, D. Schott, R.A. Schumacher, H. Seraydaryan, E.S. Smith, D.I. Sober, D. Sokan1, S.S. Stepanyan, S. Stepanyan, S. Strauch, M. Taiuti, W. Tang, S. Tkachenko, H. Voskanyan, E. Voutier2, M.H. Wood, L. Zana, B. Zhao
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud
IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX
2 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
53 avenue des Martyrs - 38026 Grenoble Cedex
Measuring nucleon-nucleon Short Range Correlations (SRC) has been a goal of the nuclear physics community for many years. They are an important part of the nuclear wavefunction, accounting for almost all of the high-momentum strength. They are closely related to the EMC effect. While their overall probability has been measured, measuring their momentum distributions is more difficult. In order to determine the best configuration for studying SRC momentum distributions, we measured the $^3$He$(e,e'pp)n$ reaction, looking at events with high momentum protons ($p_p > 0.35$ GeV/c) and a low momentum neutron ($p_n< 0.2$ GeV/c). We examined two angular configurations: either both protons emitted forward or one proton emitted forward and one backward (with respect to the momentum transfer, $\vec q$). The measured relative momentum distribution of the events with one forward and one backward proton was much closer to the calculated initial-state $pp$ relative momentum distribution, indicating that this is the preferred configuration for measuring SRC.

Articles dans des revues avec comité de lecture
Physical Review C (Phys. Rev. C)
Publisher American Physical Society
ISSN 0556-2813 (eISSN : 1089-490X)

8 pages, 9 figures, submitted to Phys Rev C. Version 2 incorporates minor corrections in response to referee comments
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