Document Type


Date of Degree

Fall 2016

Degree Name

PhD (Doctor of Philosophy)

Degree In


First Advisor

Jane Nachtman

Second Advisor

Yasar Onel


Heavy quark decays provide a very advantageous investigation to test the Standard Model (SM). Recently, promising experiments with b quark, as well as the analysis of the huge data sets produced at the Large Hadron Collider(LHC) experiment, have led to an increasing study and sensitive measurements of relative b quark decays. In this thesis, a preliminary study is presented for the first time observation of the B+ → ψ(2S)φK+ with a statistical significance above 5 standard deviations using proton-proton collisions at √s = 8 TeV collected with CMS detector at LHC. The data sample, selected on the basis of the dimuon decay mode of the ψ(2S), corresponds to an integrated luminosity of 19.6 fb−1. A total of 140±15 B+ → ψ(2S)φK+ events have been observed. The branching fraction of B+ → ψ(2S)φK+ is measured relative to B+ → ψ(2S)K+, whose absolute branching fraction (BF) is known. The ratio is converted to an absolute branching fraction of B+ → ψ(2S)φK+, including systematics which is determined to be (4.0 ± 0.4(stat) ± 0.6(syst) ± 0.1(BR)) × 10−6, where the third uncertainty is due to imprecise knowledge of BF. The upper limit of the fraction of B+ → ψ(2S)(non−φ)K+ component in the selected B+ → ψ(2S)K+K−K+ channel is found to be 26% at 95% confidence level.


B physics, Collider Physics, High Energy Physics, particle physics


xxi, 135




This thesis has been optimized for improved web viewing. If you require the original version, contact the University Archives at the University of Iowa:


Copyright © 2016 Reddy Pratap Gandrajula

Included in

Physics Commons