Tensor Correlations Measured in He-3(e, e ' pp)n

CLAS Collaboration, H. Baghdasaryan, L. B. Weinstein, J. M. Laget, K. P. Adhikari, M. Aghasyan, M. Amarian, M. Anghinolfi, H. Avakian, J. Ball, M. Battaglieri, I. Bedlinskiy, R. P. Bennett, B. L. Berman, A. S. Biselli, C. Bookwalter, W. J. Briscoe, W. K. Brooks, S. Bueltmann, V. D. BurkertD. S. Carman, V. Crede, A. D'Angelo, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, B. Dey, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, P. Eugenio, S. Fegan, M. Y. Gabrielyan, G. P. Gilfoyle, K. L. Giovanetti, W. Gohn, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, V. Gyurjyan, H. Hakobyan, C. Hanretty, D. P. Watts

Research output: Contribution to journalArticlepeer-review


We have measured the He-3(e, e' pp)n reaction at an incident energy of 4.7 GeV over a wide kinematic range. We identified spectator correlated pp and pn nucleon pairs by using kinematic cuts and measured their relative and total momentum distributions. This is the first measurement of the ratio of pp to pn pairs as a function of pair total momentum p(tot). For pair relative momenta between 0.3 and 0.5 GeV/c, the ratio is very small at low p(tot) and rises to approximately 0.5 at large p(tot). This shows the dominance of tensor over central correlations at this relative momentum.

Original languageEnglish
Article number222501
Pages (from-to)-
Number of pages5
JournalPhysical Review Letters
Issue number22
Publication statusPublished - 24 Nov 2010


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