dc.contributor.advisor | Milner, Richard | |
dc.contributor.author | Moran, Patrick | |
dc.date.accessioned | 2024-09-26T18:16:59Z | |
dc.date.available | 2024-09-26T18:16:59Z | |
dc.date.issued | 2024-02 | |
dc.date.submitted | 2024-08-18T13:57:28.188Z | |
dc.identifier.uri | https://hdl.handle.net/1721.1/157071 | |
dc.description.abstract | This analysis studies the exclusive ϕ meson electroproduction process ep → e′p′ϕ at CLAS12 in the kinematic region 0.39 ≤ Q² ≤ 8.38 GeV², 1.97 ≤ W ≤ 4.03 GeV, and 0.17 ≤ −t ≤ 7.26GeV². Cross section σ(Q²,W) and differential cross section dσ/dt (Q²,W,t) measurements are reported. The scaling of the overall cross section was determined to be 1/Q⁶˙⁴⁷⁺⁻⁰˙⁹⁷, which is consistent with the Generalized Parton Distribution (GPD) prediction of 1/Q⁶. The ratios of the longitudinal and transverse cross sections, R = σL / σT , are extracted from the angular decay distributions for four values of Q² and are found to be consistent with the GPD scaling prediction. The mean-square gluonic radius of the proton ⟨b²⟩ subscript g is extracted from the t-dependence of the differential cross sections dσ / dt in the kinematic region 0.12 ≤ x subscript B ≤ 0.39, the first such measurement in the valence regime. | |
dc.publisher | Massachusetts Institute of Technology | |
dc.rights | In Copyright - Educational Use Permitted | |
dc.rights | Copyright retained by author(s) | |
dc.rights.uri | https://rightsstatements.org/page/InC-EDU/1.0/ | |
dc.title | Cross Section Measurement of Exclusive ϕ-Meson Electroproduction off the Proton at CLAS12 | |
dc.type | Thesis | |
dc.description.degree | Ph.D. | |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | |
mit.thesis.degree | Doctoral | |
thesis.degree.name | Doctor of Philosophy | |