The prompt production of &chi / c quarkonia is studied in proton-proton collisions at 7 TeV, using
data collected by CMS in 2011 corresponding to an integrated luminosity of 4.6 fb
&minus / 1. The
&chi / c mesons are reconstructed through their radiative decays to J/&psi / and photon with J/&psi / &rarr / &mu / +&mu / &minus / . The photons are reconstructed through their conversion in electron-positron pairs in
the tracking detector which gives a mass resolution sufficient for resolving these states. The
ratio of the prompt production cross sections for the &chi / c1 and &chi / c2 states, &sigma / (&chi / c2)/&sigma / (&chi / c1), has
been determined as a function of the J/&psi / transverse momentum between 7 and 25 GeV/c.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12614979/index.pdf |
| Date | 01 September 2012 |
| Creators | Akin, Ilina V. |
| Contributors | Zeyrek, Mehmet |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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