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Photo-Production Of Eta Mesons, Mahmoud Mohamed Kamel
Photo-Production Of Eta Mesons, Mahmoud Mohamed Kamel
FIU Electronic Theses and Dissertations
In this work we present the GlueX experiment extensive high statistics measurements of the η meson photo-production differential cross sections at beam energies between 3 GeV and 11.6 GeV. We compared the low energy (2.9 GeV< Eγ < 5.9 GeV) differential cross section (dσ/dΩ) results to previous experimental results from the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS) collaboration. These (dσ/dΩ) results are also compared to the theoretical isobar model EtaMAID2018 by Tiator et. al., and the Regge model by Nys et. al. The differential cross section dσ/dt is also presented and compared to the previous experimental results, and to the above models, in addition to a model by J. M. Laget. The high energy (6.2 GeV< Eγ < 11.6 GeV) cross section results (dσ/dΩ, and dσ/dt) are compared to the isobar model EtaMAID2018. These results will provide new constraints on η photo-production mechanisms and high energy t- channel processes.
Cross Section Measurements Of Deuteron Electro-Disintegration At Very High Recoil Momenta And Large 4-Momentum Transfers (Q2), Carlos Yero
FIU Electronic Theses and Dissertations
The 2H(e,e′p)n cross sections have been measured at negative 4-momentum transfers of Q2 = 4.5±0.5 (GeV/c)2 and Q2 = 3.5±0.5 (GeV/c)2 reaching neutron recoil (missing) momenta up to pr ∼1.0 GeV/c. The data have been obtained at fixed neutron recoil angles 5o ≤ θnq ≤ 95o with respect to the 3-momentum transfer q. The new data agree well with the previous data which reached pr ∼ 500 MeV/c. At θnq = 35o and 45o, final state interactions (FSI), meson exchange currents (MEC) and isobar configurations (IC) …