Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A(e,e^{'}pp) Reaction

E O Cohen¹, O Hen², E Piasetzky¹, L B Weinstein³, M Duer¹, A Schmidt², I Korover¹, H Hakobyan⁴, S Adhikari⁵, Z Akbar⁶, M J Amaryan³, H Avakian⁷, J Ball⁸, L Barion⁹, M Battaglieri¹⁰, A Beck², I Bedlinskiy¹¹, A S Biselli^{12

13}, S Boiarinov⁷, W Briscoe¹⁴, V D Burkert⁷, F Cao¹⁵, D S Carman⁷, A Celentano¹⁰, G Charles¹⁶, Pierre Chatagnon¹⁶, T Chetry¹⁷, G Ciullo^{18

9}, Brandon A Clary¹⁵, M Contalbrigo⁹, V Crede⁶, R Cruz Torres², A D'Angelo^{19

20}, N Dashyan²¹, R De Vita¹⁰, E De Sanctis²², M Defurne⁸, A Deur⁷, S Diehl¹⁵, C Djalali²³, M Duer¹, R Dupre¹⁶, H Egiyan⁷, Mathieu Ehrhart¹⁶, A El Alaoui⁴, L El Fassi²⁴, P Eugenio⁶, G Fedotov¹⁷, R Fersch^{25

26}, A Filippi²⁷, Y Ghandilyan²¹, K L Giovanetti²⁸, F X Girod⁷, E Golovatch²⁹, R W Gothe²³, K A Griffioen²⁶, K Hafidi^{30

21}, N Harrison⁷, F Hauenstein³, D Heddle^{25

7}, K Hicks¹⁷, M Holtrop³¹, D G Ireland³², B S Ishkhanov²⁹, E L Isupov²⁹, D Jenkins³³, H S Jo³⁴, S Johnston³⁰, M L Kabir²⁴, D Keller³⁵, G Khachatryan²¹, M Khachatryan³, M Khandaker³⁶, A Kim¹⁵, W Kim³⁴, A Klein³, F J Klein³⁷, I Korover³⁸, V Kubarovsky^{39

7}, S E Kuhn³, L Lanza¹⁹, P Lenisa⁹, K Livingston³², I J D MacGregor³², D Marchand¹⁶, B McKinnon³², S Mey-Tal Beck², C A Meyer¹², M Mirazita²², V Mokeev^{29

7}, R A Montgomery³², A Movsisyan⁹, C Munoz Camacho¹⁶, B Mustapha³⁰, P Nadel-Turonski⁷, S Niccolai¹⁶, G Niculescu²⁸, M Osipenko¹⁰, A I Ostrovidov⁶, M Paolone⁴⁰, R Paremuzyan³¹, E Pasyuk^{41

7}, O Pogorelko¹¹, J W Price⁴², Y Prok^{3

35}, D Protopopescu³², M Ripani¹⁰, D Riser¹⁵, A Rizzo^{19

20}, G Rosner³², P Rossi^{22

7}, F Sabatié⁸, B A Schmookler², R A Schumacher¹², Y G Sharabian⁷, D Sokhan³², N Sparveris⁴⁰, S Stepanyan⁷, S Strauch²³, M Taiuti¹⁰, J A Tan³⁴, M Ungaro^{39

7}, H Voskanyan²¹, E Voutier¹⁶, R Wang¹⁶, D P Watts⁴³, X Wei⁷, M H Wood^{44

23}, N Zachariou⁴³, J Zhang³⁵, X Zheng³⁵, Z W Zhao⁴⁵; CLAS Collaboration

Affiliations

¹ School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel.
² Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
³ Old Dominion University, Norfolk, Virginia 23529, USA.
⁴ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
⁵ Florida International University, Miami, Florida 33199, USA.
⁶ Florida State University, Tallahassee, Florida 32306, USA.
⁷ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
⁸ IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France.
⁹ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
¹⁰ INFN, Sezione di Genova, 16146 Genova, Italy.
¹¹ Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia.
¹² Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
¹³ Fairfield University, Fairfield Connecticut 06824, USA.
¹⁴ Institute for Nuclear Studies, Department of Physics, The George Washington University, Washington DC 20052, USA.
¹⁵ University of Connecticut, Storrs, Connecticut 06269, USA.
¹⁶ Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France.
¹⁷ Ohio University, Athens, Ohio 45701, USA.
¹⁸ Universita' di Ferrara, 44121 Ferrara, Italy.
¹⁹ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
²⁰ Universita' di Roma Tor Vergata, 00133 Rome Italy.
²¹ Yerevan Physics Institute, 375036 Yerevan, Armenia.
²² INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
²³ University of South Carolina, Columbia, South Carolina 29208, USA.
²⁴ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
²⁵ Christopher Newport University, Newport News, Virginia 23606, USA.
²⁶ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
²⁷ INFN, Sezione di Torino, 10125 Torino, Italy.
²⁸ James Madison University, Harrisonburg, Virginia 22807, USA.
²⁹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
³⁰ Argonne National Laboratory, Argonne, Illinois 60439, USA.
³¹ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³² University of Glasgow, Glasgow G12 8QQ, United Kingdom.
³³ Virginia Tech, Blacksburg, Virginia 24061-0435, USA.
³⁴ Kyungpook National University, Daegu 41566, Republic of Korea.
³⁵ University of Virginia, Charlottesville, Virginia 22901, USA.
³⁶ Norfolk State University, Norfolk, Virginia 23504, USA.
³⁷ Catholic University of America, Washington, DC 20064, USA.
³⁸ Nuclear Research Centre Negev, Beer-Sheva, Israel.
³⁹ Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
⁴⁰ Temple University, Philadelphia, Pennsylvania 19122, USA.
⁴¹ Arizona State University, Tempe, Arizona 85287-1504, USA.
⁴² California State University, Dominguez Hills, Carson, California 90747, USA.
⁴³ Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
⁴⁴ Canisius College, Buffalo, New York 14208, USA.
⁴⁵ Duke University, Durham, North Carolina 27708-0305, USA.

PMID: 30230869
DOI: 10.1103/PhysRevLett.121.092501

Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A(e,e^{'}pp) Reaction

E O Cohen et al. Phys Rev Lett. 2018.

. 2018 Aug 31;121(9):092501.

doi: 10.1103/PhysRevLett.121.092501.

Authors

Affiliations

¹ School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel.
² Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
³ Old Dominion University, Norfolk, Virginia 23529, USA.
⁴ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
⁵ Florida International University, Miami, Florida 33199, USA.
⁶ Florida State University, Tallahassee, Florida 32306, USA.
⁷ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
⁸ IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France.
⁹ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
¹⁰ INFN, Sezione di Genova, 16146 Genova, Italy.
¹¹ Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia.
¹² Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
¹³ Fairfield University, Fairfield Connecticut 06824, USA.
¹⁴ Institute for Nuclear Studies, Department of Physics, The George Washington University, Washington DC 20052, USA.
¹⁵ University of Connecticut, Storrs, Connecticut 06269, USA.
¹⁶ Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France.
¹⁷ Ohio University, Athens, Ohio 45701, USA.
¹⁸ Universita' di Ferrara, 44121 Ferrara, Italy.
¹⁹ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
²⁰ Universita' di Roma Tor Vergata, 00133 Rome Italy.
²¹ Yerevan Physics Institute, 375036 Yerevan, Armenia.
²² INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
²³ University of South Carolina, Columbia, South Carolina 29208, USA.
²⁴ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
²⁵ Christopher Newport University, Newport News, Virginia 23606, USA.
²⁶ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
²⁷ INFN, Sezione di Torino, 10125 Torino, Italy.
²⁸ James Madison University, Harrisonburg, Virginia 22807, USA.
²⁹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
³⁰ Argonne National Laboratory, Argonne, Illinois 60439, USA.
³¹ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³² University of Glasgow, Glasgow G12 8QQ, United Kingdom.
³³ Virginia Tech, Blacksburg, Virginia 24061-0435, USA.
³⁴ Kyungpook National University, Daegu 41566, Republic of Korea.
³⁵ University of Virginia, Charlottesville, Virginia 22901, USA.
³⁶ Norfolk State University, Norfolk, Virginia 23504, USA.
³⁷ Catholic University of America, Washington, DC 20064, USA.
³⁸ Nuclear Research Centre Negev, Beer-Sheva, Israel.
³⁹ Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
⁴⁰ Temple University, Philadelphia, Pennsylvania 19122, USA.
⁴¹ Arizona State University, Tempe, Arizona 85287-1504, USA.
⁴² California State University, Dominguez Hills, Carson, California 90747, USA.
⁴³ Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
⁴⁴ Canisius College, Buffalo, New York 14208, USA.
⁴⁵ Duke University, Durham, North Carolina 27708-0305, USA.

PMID: 30230869
DOI: 10.1103/PhysRevLett.121.092501

Abstract

Short-range correlated (SRC) nucleon pairs are a vital part of the nucleus, accounting for almost all nucleons with momentum greater than the Fermi momentum (k_{F}). A fundamental characteristic of SRC pairs is having large relative momenta as compared to k_{F}, and smaller center of mass (c.m.) which indicates a small separation distance between the nucleons in the pair. Determining the c.m. momentum distribution of SRC pairs is essential for understanding their formation process. We report here on the extraction of the c.m. motion of proton-proton (pp) SRC pairs in carbon and, for the first time in heavier and ansymetric nuclei: aluminum, iron, and lead, from measurements of the A(e,e^{'}pp) reaction. We find that the pair c.m. motion for these nuclei can be described by a three-dimensional Gaussian with a narrow width ranging from 140 to 170 MeV/c, approximately consistent with the sum of two mean-field nucleon momenta. Comparison with calculations appears to show that the SRC pairs are formed from mean-field nucleons in specific quantum states.

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Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A(e,e^{'}pp) Reaction

Affiliations

Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A(e,e^{'}pp) Reaction

Authors

Affiliations

Abstract