title: Measurement of CP violation in B0-B0bar mixing using semileptonic decays at LHCb
creator: Grillo, Lucia
subject: ddc-500
subject: 500 Natural sciences and mathematics
subject: ddc-530
subject: 530 Physics
description: This thesis presents the measurement of the CP-violating asymmetry in B0-B0bar mixing using data corresponding to an integrated luminosity of 3.0 fb^{−1} collected at the LHCb experiment in proton-proton collisions at the center-of-mass energies of 7 TeV and 8 TeV. This analysis uses untagged, semileptonic B0 → D−μ+ν and B0 → D∗−μ+ν decays, where the D− decays into K+π−π−, and the D∗− decays into D0(→ K+π−)π−. The neutrino in the semileptonic B decays is not reconstructed. A decay time dependent fit allows to disentangle the CP asymmetry from the possible B0-B0bar production asymmetry. Detection and reconstruction asymmetries are calibrated using promptly produced Cabibbo-favored D+ decays, and inclusive secondary J/ψ decays. The CP-violating asymmetry is measured to be  a^{d}_{sl} = (−0.02 ± 0.19 (stat) ± 0.30 (syst))% .  This result is consistent with the Standard Model prediction, and it is the most precise measurement from a single experiment to date. This measurement is published in Physical Review Letters
date: 2015
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/19555/1/dissertation_luciagrillo_02062015.pdf
identifier: DOI:10.11588/heidok.00019555
identifier: urn:nbn:de:bsz:16-heidok-195556
identifier:   Grillo, Lucia  (2015) Measurement of CP violation in B0-B0bar mixing using semileptonic decays at LHCb.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/19555/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng