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Title: Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A ( e , e ' p p ) Reaction

Journal Article · · Physical Review Letters
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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.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Mississippi State Univ., Mississippi State, MS (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Israel Science Foundation; Chilean Comisin Nacional de Investigacin Cient ca y Tecnolgica; French Centre National de la Recherche Scienti que and Commissariat a lEnergie Atomique the French-American Cultural Exchange; Italian Istituto Nazionale di Fisica Nucleare; National Research Foundation of Korea (NRF); UK Science and Technology Facilities Council; Commissariat a l’Energie Atomique (CEA); Israel Science Foundation (ISF); Centre National de la Recherche Scientifique (CNRS); Instituto Nazionale di Fisica Nucleare (INFN); Science and Technologies Facilities Council (STFC-UK)
Contributing Organization:
CLAS Collaboration
Grant/Contract Number:
AC05-06OR23177; AC02-06CH11357; FG02-07ER41528
OSTI ID:
1469110
Alternate ID(s):
OSTI ID: 1468863; OSTI ID: 1480440; OSTI ID: 1604089
Report Number(s):
JLAB-PHY-18-2778; DOE/OR/-23177-4512; arXiv:1805.01981; PRLTAO
Journal Information:
Physical Review Letters, Vol. 121, Issue 9; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (3)

Probing the core of the strong nuclear interaction journal February 2020
Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei text January 2018
Probing the core of the strong nuclear interaction text January 2020

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