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Title: Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A(e,e'pp) 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 (kF). A fundamental characteristic of SRC pairs is having large relative momenta as compared to kF, 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. Here, 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)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); 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; UK Science and Technology Facilities Council
Contributing Organization:
CLAS Collaboration
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1469110
Alternate ID(s):
OSTI ID: 1604089; OSTI ID: 1468863; OSTI ID: 1480440
Report Number(s):
JLAB-PHY--18-2778; DOE/OR/--23177-4512; arXiv:1805.01981
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 121; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (80)

Short-Range Nucleon-Nucleon Correlations Investigated with the Reaction C 12 ( e , e ′ pp ) journal March 1995
New measurements of high-momentum nucleons and short-range structures in nuclei text January 2011
Short-Range Correlations and the EMC Effect in Effective Field Theory journal December 2017
Factorization of exclusive electroinduced two-nucleon knockout text January 2013
Probing Cold Dense Nuclear Matter text January 2009
Feynman Graphs and Generalized Eikonal Approach to High Energy Knock-Out Processes text January 1996
Hard nuclear processes and microscopic nuclear structure journal April 1988
Two-nucleon correlations and the structure of the nucleon spectral function at high values of momentum and removal energy journal July 1991
Quantifying short-range correlations in nuclei journal October 2012
Probing Cold Dense Nuclear Matter journal June 2008
Proton propagation in nuclei studied in the ( e , ep ) reaction journal February 1992
Stylized features of single-nucleon momentum distributions journal March 2015
Selected Topics in high Energy Semi-Exclusive Electro-Nuclear Reactions journal December 2001
The CEBAF large acceptance spectrometer (CLAS)
  • Mecking, B. A.; Adams, G.; Ahmad, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 503, Issue 3 https://doi.org/10.1016/S0168-9002(03)01001-5
journal May 2003
Influence of short-range correlations in neutrino-nucleus scattering journal August 2016
Variational calculation of the ground state of closed-shell nuclei up to A = 40 journal August 2017
“Hammer” events, neutrino energies, and nucleon-nucleon correlations journal October 2016
Transverse electrodisintegration of the deuteron in the threshold region at high Q 2 journal July 1990
Factorization of exclusive electron-induced two-nucleon knockout journal February 2014
Probing the repulsive core of the nucleon-nucleon interaction via the He 4 (e,e′pN) triple-coincidence reaction text January 2014
Symmetry energy of cold nucleonic matter within a relativistic mean field model encapsulating effects of high momentum nucleons induced by short-range correlations text January 2015
Final-state interactions in two-nucleon knockout reactions journal March 2016
Measurement of Two- and Three-Nucleon Short-Range Correlation Probabilities in Nuclei journal March 2006
Short-range correlations and neutrinoless double beta decay journal April 2007
Evidence for Strong Dominance of Proton-Neutron Correlations in Nuclei journal October 2006
A double-target system for precision measurements of nuclear medium effects
  • Hakobyan, H.; Brooks, W. K.; Bruhwel, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 592, Issue 3 https://doi.org/10.1016/j.nima.2008.04.055
journal July 2008
The emc Effect and high Momentum Nucleons in Nuclei journal July 2013
Exclusive electrodisintegration of He 3 at high Q 2 . II. Decay function formalism journal April 2005
Neutrino-Nucleus Interactions journal November 2011
High-energy phenomena, short-range nuclear structure and QCD journal October 1981
Hard probes of short-range nucleon–nucleon correlations journal October 2012
Final-state interactions in two-nucleon knockout reactions text January 2015
Quantum Monte Carlo methods for nuclear physics journal September 2015
New data strengthen the connection between short range correlations and the EMC effect journal April 2012
Nuclear Fermi Momenta from Quasielastic Electron Scattering journal February 1971
Nucleon and nucleon-pair momentum distributions in A ≤ 12 nuclei journal February 2014
Symmetry energy of nucleonic matter with tensor correlations journal February 2015
The nuclear contacts and short range correlations in nuclei text January 2016
Nucleon-Nucleon Correlations, Short-lived Excitations, and the Quarks Within text January 2016
n − p Short-Range Correlations from ( p , 2 p + n ) Measurements journal January 2003
Measurement of Muon Antineutrino Quasielastic Scattering on a Hydrocarbon Target at E ν ∼ 3.5     GeV journal July 2013
The detection of back-to-back proton pairs in Charged-Current neutrino interactions with the ArgoNeuT detector in the NuMI low energy beam line text January 2014
In-medium short-range dynamics of nucleons: Recent theoretical and experimental advances journal August 2015
Constraints on the large- x d / u ratio from electron-nucleus scattering at x > 1 journal December 2011
Quantifying short-range correlations in nuclei text January 2012
Nuclear transparency from quasielastic A(e,e'p) reactions uo to Q^2=8.1 (GeV/c)^2 text January 2001
Nuclear matrix element of neutrinoless double- β decay: Relativity and short-range correlations journal February 2017
Short Range Correlations and the EMC Effect journal February 2011
A-dependence of nuclear transparency in quasielastic A(e, ef'p) at high 2 journal May 1995
Nucleon-nucleon correlations, short-lived excitations, and the quarks within journal November 2017
Counting the number of correlated pairs in a nucleus journal September 2011
Measurement of transparency ratios for protons from short-range correlated pairs journal May 2013
Momentum sharing in imbalanced Fermi systems journal October 2014
The nuclear contacts and short range correlations in nuclei journal May 2018
The high-momentum components in the wave functions of the few-body systems journal December 1987
Photoinduced two-proton knockout and ground-state correlations in nuclei journal August 1996
New Measurements of High-Momentum Nucleons and Short-Range Structures in Nuclei journal February 2012
Observation of nuclear scaling in the A ( e , e ′ ) reaction at x B > 1 journal July 2003
Investigation of Proton-Proton Short-Range Correlations via the C 12 ( e , e ′ p p ) Reaction journal August 2007
Evidence for short-range correlations from high Q 2 ( e , e ’) reactions journal November 1993
Investigation of the exclusive 3 He ( e , e ′ p p ) n reaction journal December 2000
Quasifree ( e , e ′ p ) Reactions and Proton Propagation in Nuclei journal June 1998
Short range correlations and the EMC effect journal April 2011
Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the He 4 ( e , e ′ p N ) Triple-Coincidence Reaction journal July 2014
Universality of nucleon-nucleon short-range correlations: The factorization property of the nuclear wave function, the relative and center-of-mass momentum distributions, and the nuclear contacts journal October 2016
Short-range correlations in nuclei with similarity renormalization group transformations journal August 2015
Selected Topics in High Energy Semi-Exclusive Electro-Nuclear Reactions text January 2001
Detection of back-to-back proton pairs in charged-current neutrino interactions with the ArgoNeuT detector in the NuMI low energy beam line journal July 2014
Investigation of short-range nucleon-nucleon correlations using the reaction in close to 4π geometry journal March 1998
Realistic Model of the Nucleon Spectral Function in Few- and Many- Nucleon Systems text January 1995
Symmetry energy of cold nucleonic matter within a relativistic mean field model encapsulating effects of high-momentum nucleons induced by short-range correlations journal January 2016
Microscopic nucleon spectral function for finite nuclei featuring two- and three-nucleon short-range correlations: The model versus ab initio calculations for three-nucleon systems journal April 2017
The EMC Effect and High Momentum Nucleons in Nuclei text January 2013
Measurement of Muon Neutrino Quasielastic Scattering on a Hydrocarbon Target at E ν ∼ 3.5     GeV journal July 2013
Recent Observation of Short-Range Nucleon Correlations in Nuclei and Their Implications for the Structure of Nuclei and Neutron Stars journal August 2008
New data strengthen the connection between Short Range Correlations and the EMC effect text January 2012
Nuclear transparency from quasielastic A ( e , e ′ p ) reactions up to Q 2 = 8.1 ( GeV / c ) 2 journal October 2002
A microscopic nucleon spectral function for finite nuclei featuring two- and trhee-nucleon short-range correlations: I. The model vs. ab-initio calculations for the three-nucleon systems text January 2017
Feynman graphs and generalized eikonal approach to high energy knock-out processes journal August 1997
Realistic model of the nucleon spectral function in few- and many-nucleon systems journal April 1996

Cited By (5)

Probing the core of the strong nuclear interaction journal February 2020
Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei journal May 2019
Probing the core of the strong nuclear interaction text January 2020
Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei text January 2018
Isospin composition of the high-momentum fluctuations in nuclei from asymptotic momentum distributions journal November 2019