Spin polarization of J/Ψ through lepton decay

dc.contributor.advisor Marzia Rosati
dc.contributor.author Hotvedt, Nels
dc.contributor.department Physics and Astronomy
dc.date 2018-08-11T11:17:05.000
dc.date.accessioned 2020-06-30T03:09:02Z
dc.date.available 2020-06-30T03:09:02Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2017
dc.date.embargo 2001-01-01
dc.date.issued 2017-01-01
dc.description.abstract <p>This thesis presents a compilation of the latest research on J/Ψ polarization and bremsstrahlung along with the background surrounding the J/Ψ’s history. It covers the fundamentals of the standard model, quantum chromodynamics, deep inelastic scattering, and the calculations behind charm-anticharm production from hadron collisions. It shows research that’s centered on recombining identified bremsstrahlung with di-electron pairs to improve the J/Ψ invariant mass peak. The research for polarization studies simulated J/Ψ di-electron pairs with no polarization and pT between 0.0 to 1.5 GeV in the central arm. The PHENIX detector systems, namely the drift chamber, electromagnetic calorimeter, and RICH, are used to identify electrons. To examine the quality of the polarization fit, χ2 methods are used to scrutinize the simulated data.</p> <p>The bremsstrahlung research shows that there is a clear indication that bremsstrahlung can be identified at an opening angle less than 0.07 radians from their parent electron, and they are mostly found on the western half of the detector. In the polarization study, simulations show that measuring the polarization in the central arm would be feasible if one were to examine the real data using the same methods.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/16146/
dc.identifier.articleid 7153
dc.identifier.contextkey 11456972
dc.identifier.doi https://doi.org/10.31274/etd-180810-5775
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/16146
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/30329
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/16146/Hotvedt_iastate_0097M_16927.pdf|||Fri Jan 14 20:55:44 UTC 2022
dc.subject.disciplines Physics
dc.subject.keywords Charm
dc.subject.keywords Nuclear
dc.subject.keywords Physics
dc.subject.keywords Quark
dc.title Spin polarization of J/Ψ through lepton decay
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
thesis.degree.discipline Physics
thesis.degree.level thesis
thesis.degree.name Master of Science
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