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Nuclear Transparency Measurements in large-angle quasi-elastic A(p,2p) scattering at BNL

Jun 8, 2021, 4:30 PM
30m
Online

Online

Zoom meeting ID: 982 7429 3376 (Please register for the password)
Slides Session 4

Speaker

Israel Mardor (Tel Aviv U.)

Description

We present the results of two experimental programs at the Alternating Gradient Synchrotron of Brookhaven National Lab, to measure the nuclear transparency of nuclei via the quasi-elastic A(p,2p) scattering process near 90° in the pp center of mass. Data was taken at effective incident momenta ranging from 5.0 to 15.8 GeV/c (taking into account the Fermi motion of the target proton in the nucleus), corresponding to 4.8 < Q2 < 12.7 GeV/c2. We discuss the experimental techniques of the two programs, and show our finding that the A(p,2p) nuclear transparency, unlike A(e,e’p) data, is incompatible with a constant value versus energy as predicted by Glauber calculations. We further present the observed scattering angle and A dependence of the data, and describe the possible theoretical explanations of our observed trends.

Presentation materials