Energy Dependence of Nuclear Transparency in C(p,2p) Scattering
A. Leksanov, J. Alster, G. Asryan, Y. Averichev, D. Barton, V., Baturin, N. Bukhtoyarova, A. Carroll, S. Heppelmann, T. Kawabata, Y. Makdisi,, E. Minina, I. Navon, A. Malki, H. Nicholson, A. Ogawa, Yu. Panebratsev, E., Piasetzky, A. Schetkovsky, S. Shimanskiy, A. Tang
TL;DR
This study measures how nuclear transparency in carbon for (p,2p) scattering varies with beam energy from 6 to 14.5 GeV, revealing a sharp increase around 9 GeV followed by a decrease at higher energies.
Contribution
It provides the first detailed energy dependence of nuclear transparency in carbon for (p,2p) scattering over a wide energy range, incorporating a nuclear momentum distribution model.
Findings
Transparency sharply rises near 9 GeV
Transparency decreases to Glauber levels at higher energies
Energy dependence aligns with theoretical models
Abstract
The transparency of carbon for (p,2p) quasi-elastic events was measured at beam energies ranging from 6 to 14.5 GeV at 90 degrees c.m. The four momentum transfer squared q*q ranged from 4.8 to 16.9 (GeV/c)**2. We present the observed energy dependence of the ratio of the carbon to hydrogen cross sections. We also apply a model for the nuclear momentum distribution of carbon to normalize this transparency ratio. We find a sharp rise in transparency as the beam energy is increased to 9 GeV and a reduction to approximately the Glauber level at higher energies.
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