Momentum sharing in imbalanced Fermi systems

被引:232
作者
Hen, O. [1 ]
Sargsian, M. [2 ]
Weinstein, L. B. [3 ]
Piasetzky, E. [1 ]
Hakobyan, H. [4 ,5 ]
Higinbotham, D. W. [6 ]
Braverman, M. [1 ]
Brooks, W. K. [4 ]
Gilad, S. [7 ]
Adhikari, K. P. [3 ]
Arrington, J. [8 ]
Asryan, G. [5 ]
Avakian, H. [6 ]
Ball, J. [9 ]
Baltzell, N. A. [8 ]
Battaglieri, M. [10 ]
Beck, A. [1 ,11 ]
Beck, S. May-Tal [1 ,11 ]
Bedlinskiy, I. [12 ]
Bertozzi, W. [7 ]
Biselli, A. [13 ]
Burkert, V. D. [6 ]
Cao, T. [14 ]
Carman, D. S. [6 ]
Celentano, A. [10 ]
Chandavar, S. [15 ]
Colaneri, L. [16 ]
Cole, P. L. [6 ,17 ,18 ]
Crede, V. [19 ]
D'Angelo, A. [16 ,20 ]
De Vita, R. [10 ]
Deur, A. [6 ]
Djalali, C. [14 ,21 ]
Doughty, D. [6 ,22 ]
Dugger, M. [23 ]
Dupre, R. [24 ]
Egiyan, H. [6 ]
El Alaoui, A. [8 ]
El Fassi, L. [3 ]
Elouadrhiri, L. [6 ]
Fedotov, G. [14 ,25 ]
Fegan, S. [10 ]
Forest, T. [17 ]
Garillon, B. [24 ]
Garcon, M. [9 ]
Gevorgyan, N. [5 ]
Ghandilyan, Y. [5 ]
Gilfoyle, G. P. [26 ]
Girod, F. X. [6 ]
Goetz, J. T. [15 ]
机构
[1] Tel Aviv Univ, IL-69978 Tel Aviv, Israel
[2] Florida Int Univ, Miami, FL 33199 USA
[3] Old Dominion Univ, Norfolk, VA 23529 USA
[4] Univ Tecn Federico Santa Maria, Valparaiso, Chile
[5] Yerevan Phys Inst, Yerevan 375036, Armenia
[6] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
[7] MIT, Cambridge, MA 02139 USA
[8] Argonne Natl Lab, Argonne, IL 60439 USA
[9] Ctr Saclay, Irfu, Commissariat Energie Atom & Energies Alternat, Serv Phys Nucl, F-91191 Gif Sur Yvette, France
[10] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[11] Nucl Res Ctr Negev, IL-84190 Beer Sheva, Israel
[12] Inst Theoret & Expt Phys, Moscow 117259, Russia
[13] Fairfield Univ, Fairfield, CT 06824 USA
[14] Univ S Carolina, Columbia, SC 29208 USA
[15] Ohio Univ, Athens, OH 45701 USA
[16] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy
[17] Idaho State Univ, Pocatello, ID 83209 USA
[18] Catholic Univ Amer, Washington, DC 20064 USA
[19] Florida State Univ, Tallahassee, FL 32306 USA
[20] Univ Roma Tor Vergata, I-00133 Rome, Italy
[21] Univ Iowa, Iowa City, IA 52242 USA
[22] Christopher Newport Univ, Newport News, VA 23606 USA
[23] Arizona State Univ, Tempe, AZ 85287 USA
[24] Inst Phys Nucl ORSAY, Orsay, France
[25] Skobeltsyn Inst Nucl Phys, Lomonosov, Russia
[26] Univ Richmond, Richmond, VA 23173 USA
[27] Coll William & Mary, Williamsburg, VA 23187 USA
[28] Univ Virginia, Charlottesville, VA 22901 USA
[29] Univ New Hampshire, Durham, NH 03824 USA
[30] George Washington Univ, Washington, DC 20052 USA
[31] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[32] Univ Connecticut, Storrs, CT 06269 USA
[33] Norfolk State Univ, Norfolk, VA 23504 USA
[34] Kyungpook Natl Univ, Taegu 702701, South Korea
[35] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy
[36] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[37] Moscow MV Lomonosov State Univ, Moscow 119234, Russia
[38] James Madison Univ, Harrisonburg, VA 22807 USA
[39] Univ Ferrara, I-44122 Ferrara, Italy
[40] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[41] Calif State Univ Dominguez Hills, Carson, CA 90747 USA
[42] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland
[43] Rensselaer Polytech Inst, Troy, NY 12180 USA
[44] Univ Genoa, I-16146 Genoa, Italy
[45] Univ Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3,Inst Natl Polytech, Grenoble, France
[46] Canisius Coll, Buffalo, NY 14208 USA
基金
以色列科学基金会; 美国国家科学基金会; 英国科学技术设施理事会; 新加坡国家研究基金会;
关键词
NUCLEAR; SCATTERING;
D O I
10.1126/science.1256785
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The atomic nucleus is composed of two different kinds of fermions: protons and neutrons. If the protons and neutrons did not interact, the Pauli exclusion principle would force the majority of fermions (usually neutrons) to have a higher average momentum. Our high-energy electron-scattering measurements using C-12, Al-27, Fe-56, and Pb-208 targets show that even in heavy, neutron-rich nuclei, short-range interactions between the fermions form correlated high-momentum neutron-proton pairs. Thus, in neutron-rich nuclei, protons have a greater probability than neutrons to have momentum greater than the Fermi momentum. This finding has implications ranging from nuclear few-body systems to neutron stars and may also be observable experimentally in two-spin-state, ultracold atomic gas systems.
引用
收藏
页码:614 / 617
页数:4
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