Physics Letters B
We present a study of high energy photodisintegration of proton-pairs through the γ + 3He → p + p + n channel. Photon energies, Eγ , from 0.8 to 4.7 GeV were used in kinematics corresponding to a proton pair with high relative momentum and a neutron nearly at rest. The s−11 scaling of the cross section, as predicted by the constituent counting rule for two nucleon photodisintegration, was observed for the first time. The onset of the scaling is at a higher energy and the cross section is significantly lower than for deuteron (pn pair) photodisintegration. For Eγ below the scaling region, the scaled cross section was found to present a strong energy-dependent structure not observed in deuteron photodisintegration.
Original Publication Citation
Pomerantz, I., Bubis, N., Allada, K., Beck, A., Beck, S., Berman, B. L., . . . Zheng, X. (2010). Hard photodisintegration of a proton pair. Physics Letters B, 684(2–3), 106-109. doi:https://doi.org/10.1016/j.physletb.2009.12.050
Pomerantz, I.; Bubis, N.; Allada, K.; Beck, A.; Berman, B. L.; Boeglin, W.; Camsonne, A.; Canan, M.; Chirapatpimol, K.; and Cisbani, E., "Hard Photodisintegration of a Proton Pair" (2010). Physics Faculty Publications. 102.