CMS deneyinde anlık Chic üretiminde ơ(Xc₂)/ơ(Xc₁) tesir kesit oranı ölçümü.

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Tezin Türü: Doktora

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Türkiye

Tezin Onay Tarihi: 2012

Tezin Dili: İngilizce

Öğrenci: Ilina Vasileva Akin

Danışman: MEHMET TEVFİK ZEYREK

Özet:

The prompt production of χc 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 −1. The χc mesons are reconstructed through their radiative decays to J/ψ and photon with J/ψ → μ+μ− . 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 ₁cross sections for the χc1 and χc2 states, σ(χc2)/σ(χc1), has been determined as a function of the J/ψ transverse momentum between 7 and 25 GeV/c.