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dc.contributor.advisorMilner, Richard
dc.contributor.authorMoran, Patrick
dc.date.accessioned2024-09-26T18:16:59Z
dc.date.available2024-09-26T18:16:59Z
dc.date.issued2024-02
dc.date.submitted2024-08-18T13:57:28.188Z
dc.identifier.urihttps://hdl.handle.net/1721.1/157071
dc.description.abstractThis 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.publisherMassachusetts Institute of Technology
dc.rightsIn Copyright - Educational Use Permitted
dc.rightsCopyright retained by author(s)
dc.rights.urihttps://rightsstatements.org/page/InC-EDU/1.0/
dc.titleCross Section Measurement of Exclusive ϕ-Meson Electroproduction off the Proton at CLAS12
dc.typeThesis
dc.description.degreePh.D.
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physics
mit.thesis.degreeDoctoral
thesis.degree.nameDoctor of Philosophy


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