Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B04: Short Range CorrelationsInvited Live
|
Hide Abstracts |
Sponsoring Units: DNP GFB Chair: Douglas Higinbotham, Jefferson Lab |
Saturday, April 17, 2021 10:45AM - 11:21AM Live |
B04.00001: Many-Body Factorization and Position-Momentum Equivalence of Nuclear Short-Range Correlations Invited Speaker: Diego Lonardoni In this talk I will present recent developments in the theoretical study of nucleon-nucleon short-range correlations. By combining the effective pair-based Generalized Contact Formalism with ab-initio Quantum Monte Carlo calculations of nuclei from deuteron to $^{40}$Ca, the short-distance and high-momentum components of the nuclear many-body wave function have been investigated, and implications for short-range correlations have been derived. A universal factorization of the many-body nuclear wave function at short-distance into a strongly-interacting pair and a weakly-interacting residual system is observed. The residual system distribution is consistent with that of an uncorrelated system, showing that short-distance correlation effects are predominantly embedded in two-body correlations. Spin- and isospin-dependent ``nuclear contact terms'' are extracted in both coordinate and momentum space for different realistic nuclear potentials. The contact coefficient ratio between two different nuclei shows very little dependence upon the nuclear interaction model. These findings allow one to extend the application of mean-field approximations to short-range correlated pair formation by showing that the relative abundance of short-range pairs in the nucleus is a long-range (\textit{i.e.}, mean-field) quantity that is insensitive to the short-distance nature of the nuclear force. [Preview Abstract] |
Saturday, April 17, 2021 11:21AM - 11:57AM Live |
B04.00002: SRC and Few Body Precision Measurements on $^3$H and $^3$He mirror nuclei Invited Speaker: Holly Szumila-Vance This talk will discuss the exciting experimental program studying short range correlations and few body dynamics at Jefferson Lab in $A=3$ nuclei. Quasi-elastic electron scattering on these light nuclei have readily calculable ground states but can already exhibit complex nuclear behavior including nucleon-nucleon (NN) short range correlations (SRCs). $^3$H and $^3$He, being mirror nuclei, exploit the maximum available isospin asymmetry and can be compared directly with ab initio calculations. This talk will summarize the recent Hall A $^3$H and $^3$He results. The first measurement of SRC nucleons in $^3$He using the CLAS detector from Hall B and identifying lead neutrons in $np$ pairs at high missing momentum will be shown. These fascinating results will be extended in an approved experiment using the CLAS12 detector to measure high-statistics and absolute cross sections on $^2$H, $^3$He, and $^3$H with a wide range of kinematical coverage. This talk will discuss the recent and proposed measurements and their implications on nuclear models for few body nuclear dynamics and short range structure. [Preview Abstract] |
Saturday, April 17, 2021 11:57AM - 12:33PM Live |
B04.00003: Towards the Study of Short Range Correlations in Radioactive Nuclei: The transparent nucleus in inverse kinematics Invited Speaker: Julian Kahlbow Understanding the structure of a strongly-interacting quantum mechanical system such as atomic nuclei is a formidable challenge in physics. Nucleon knockout reactions with high energy probes are widely used to reveal the inner structure of nuclei, however they cannot be applied to study unstable nuclei. We recently demonstrated the feasibility to access Short-Range Correlation (SRC) properties in nuclei with hadronic probes in inverse kinematics, opening the pathway for such studies in short-lived nuclei at upcoming accelerator facilities. The experiment was carried out at the JINR (Russia), a $^{12}$C beam at 48 GeV/c impinged on a liquid hydrogen target and the reaction products were measured kinematically complete with the BM@N detector setup. We show that by selecting the fragment in the $^{12}$C$(p,2p)^{11}$B reaction limitations posed by final-state interactions are overcome and single nucleon properties are probed in a single-step knockout reaction. The extracted ground-state distributions are in agreement with theoretical calculations. We probe SRCs in the same way by the break up of SRC pairs in $^{12}$C$(p,2pN)^{10}$B/$^{10}$Be reactions. We not only identify SRCs in such kinematical conditions for the first time but also deduce factorization and other pair properties from direct measurements. I will in particular discuss the recent results and the future experimental program towards the study of SRCs in radioactive nuclei. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700