Lecturer: Dr. Or Hen
Affiliation: Tel Aviv University
Abstract:
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 fermions, usually neutrons, to
higher average momentum. In this talk
I will present results from high-energy
electron scattering experiments, which
show that short-range interactions
between the fermions form correlated,
high-momentum, neutron-proton pairs.
Thus, in neutron-rich nuclei the
probability of finding a high-
momentum (k>kFermi) proton (a
minority Fermion) is greater than that
of a neutron (a majority Fermion). This
has wide ranging implications for
atomic, nuclear and astro physics,
including neutrino-nucleus scattering,
the EMC effect, the NuTeV anomaly,
the nuclear symmetry energy and
more. This feature is universal for
imbalanced interacting Fermi systems
and can also be observed
experimentally in two-spin states ultra-
cold atomic gas systems.
[1] O. Hen et al., Science 346, 614
(2014).
[2] I. Korover, N. Muangma, and O.
Hen et al., Phys. Rev. Lett. 113,
022501 (2014).
[3] O. Hen, L. B. Weinstein, E.
Piasetzky, G. A. Miller, M. M.
Sargsian, and Y. Sagi, arXiv:
1407.8175 (2014).
[4] O. Hen, Bao-An Li, Wen-Jun Guo,
L.B. Weinstein, and Eli Piasetzky,
Phys. Rev. C 91, 025803 (2015).
Additional details of the upcoming Israeli
Joint Nuclear Physics' Seminars can be
found on the following link.