Investigation of proton-proton short-range correlations via the $^{12}$C(e,e'pp) reaction

R. Shneor , P. Monaghan , R. Subedi , B. D. Anderson , K. Aniol , J. Annand , J. Arrington , H. Benaoum , F. Benmokhtar , P.Y. Bertin (1) , W. Bertozzi , W. Boeglin , J. P. Chen , S. K. Choi , E. Chudakov , E. Cisbani , B. Craver , C. W. de Jager , R. Feuerbach , S. Frullani , F. Garibaldi , O. Gayou , S. Gilad , R. Gilman , O. Glamazdin , J. Gomez , O. Hansen , D. W. Higinbotham , T. Holmstrom , H. Ibrahim , R. Igarashi , E. Jans , X. Jiang , Yuchao Jiang , L. Kaufman , A. Kelleher , A. Kolarkar , E. Kuchina , G. Kumbartzki , J.J. Lerose , R. Lindgren , N. Liyanage , D. J. Margaziotis , P. Markowitz , S. Marrone , M. Mazouz (2) , R. Michaels , B. Moffit , S. Nanda , C. F. Perdrisat , E. Piasetzky , M. Potokar , V. Punjabi , Y. Qiang , J. Reinhold , B. Reitz , G. Ron , G. Rosner , A. Saha , B. Sawatzky , A. Shahinyan , S. Sirca , K. Slifer , P. Solvignon , V. Sulkosky , N. Thompson , P. E. Ulmer , G. M. Urciuoli , E. Voutier (2) , K. Wang , J. W. Watson , L.B. Weinstein , B. Wojtsekhowski , S. Wood , H. Yao , X. Zheng , L. Zhu

1 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

We investigated simultaneously the 12C(e,e'p) and 12C(e,e'pp) reactions at Q2 = 2 [GeV/c]2, x_B = 1.2, and in an (e,e'p) missing-momentum range from 300 to 600 MeV/c. At these kinematics, with a missing-momentum greater than the Fermi momentum of nucleons in a nucleus and far from the delta excitation, short-range nucleon-nucleon correlations are predicted to dominate the reaction. For(9.5 +/- 2)% of the 12C(e,e'p) events, a recoiling partner proton was observed back-to-back to the 12C(e,e'p) missing momentum vector, an experimental signature of correlations.

Mots clés: electron-nucleus reactions; nuclear forces; nuclei with mass number 6 to 19

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

R. Shneor, P. Monaghan, R. Subedi, B. D. Anderson, K. Aniol, et al.. Investigation of proton-proton short-range correlations via the $^{12}$C(e,e'pp) reaction. Physical Review Letters, 2007, 99, pp.072501. ⟨10.1103/PhysRevLett.99.072501⟩. ⟨in2p3-00137066⟩