Pappalardo Fellows

Or Hen
Pappalardo Fellow in Physics: 2015-2018

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Name: Or Hen

Title(s): Pappalardo Fellow in Physics: 2015-2018

Office: 26-445

Email: hen@mit.edu

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Area of Physics:

Experimental Nuclear & Particle Physics

Research Interests

Or Hen is interested in studying Short-Range Correlations (SRCs) in nuclei: pairs of high-momentum nucleons in nuclei. These pairs account for almost all high-momentum (k>k_F) nucleon in nuclei and constitute 20-25% of the nuclear wave-function.

In his Ph.D. work, Hen and collaborators conducted experiments at the Jefferson National Accelerator Laboratory, where they studied the characteristics of SRC pairs in light and heavy nuclei and examined their effect on various topics in nuclear, particle, atomic and astrophysics.

For example, in a recent series of publications Hen and collaborators have shown that SRCs in atomic nuclei are predominantly neutron-proton pairs [1,2]. This has significant implications to the nuclear symmetry energy and neutron stars structure [3], quark distributions in nuclei (the “EMC effect”) [4-6], the free (un-bound) neutron structure [7], energy sharing, and correlations in ultra-cold two-component Fermi-gases in atomic physics [1,8] and more.

Biographical Sketch

Or Hen grew up in Moshav Even-Sapir, in the countryside of Jerusalem, Israel. He received his undergraduate degree in physics and computer engineering from the Hebrew University and is completing his Ph.D. in experimental physics at Tel-Aviv University, with Prof. Eli Piasetzky.

Hen has received the A. Pazi Award of the Israeli Council for Higher Education and the Y. Eisenberg Prize of Tel-Aviv University.

Selected Publications

[1] O. Hen et al. (CLAS Collaboration), “Momentum Sharing in Imbalanced Fermi Systems”, Science 346, 614 (2014).

[2] I. Korover, N. Muangma, and O. Hen et al. (Hall-A Collaboration), “Approaching the nucleon-nucleon short-range repulsive core via the 4He(e,e'pN) triple coincidence reaction”, Phys. Rev. Lett. 113, 022501 (2014).

[3] O. Hen et al., “Symmetry Energy of Nucleonic Matter with Tensor Correlations”, Phys. Rev. C, In-Print (2014).

[4] O. Hen et al., “New data strengthen the connection between Short Range Correlations and the EMC effect”, Phys. Rev. C 85, 047301 (2012).

[5] O. Hen et al., “The EMC Effect and High Momentum Nucleons in Nuclei”, Int. J. Mod. Phys. E 22, 133007 (2013).

[6] L.B. Weinstein, E. Piasetzky, D.W. Higinbotham, J. Gomez, O. Hen, and R. Shneor, “Short-Range Correlations and the EMC Eefect”, Phys. Rev. Lett. 106, 052301 (2011).

[7] O. Hen et al., “Constraints on the large-x d/u ratio from electron-nucleus scattering at x->1”, Phys. Rev. D 84, 117501 (2011).

[8] O. Hen et al, “Correlated Fermion Pairs in Nuclei and Ultracold Atomic Gases”, arXiv: 1407.8175 (2014).

[9] O. Hen et al. (CLAS Collaboration), “Measurement of Transparency Ratios for Protons from Short-Range Correlated Pairs”, Phys. Lett. B 772, 63 (2013).

Last updated on September 8, 2015 5:04 PM