Measurement of the CP Asymmetry in Semimuonic B Decays Produced in Proton-Antiproton Collisions at Center of Mass Energy= 1.96 TeV

We measure the asymmetry between positive and negative same-sign muon pairs originating from semileptonic decays of pairs of B hadrons. Low transverse momentum dimuon pairs are evaluated to determine B hadron content using a log likelihood fit to two-dimensional impact parameter significance templates. Corrections are made for asymmetries arising from the detector, trigger, and hadrons which are reconstructed as muons. Using 1.1 million muon pairs from data corresponding to an integrated luminosity of 1.6 fb-1, we find 210,000 same-sign muon pairs with both muon candidates coming from B decays. After corrections, we measure a semileptonic asymmetry from neutral B mixing of ASL = 0.0080 +/- 0.0090( stat) +/- 0.0068(syst). This asymmetry can be interpreted as a constraint on the complex phase of the CKM matrix element Vts by using the B0 neutral mixing contribution measured at the B factories. We measure the CP violating asymmetry from Bs mixing to be AsSL = 0.020 +/- 0.028.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Marino, Christopher Phillip

Contributors dc:contributor

• Kevin Pitts

• Physics, Elementary Particles and High Energy

Language dc:language

eng

Identifier

(MiAaPQ)AAI3301191

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/80563