eprintid: 19555
rev_number: 14
eprint_status: archive
userid: 2095
dir: disk0/00/01/95/55
datestamp: 2015-10-15 08:38:36
lastmod: 2015-11-09 13:27:02
status_changed: 2015-10-15 08:38:36
type: doctoralThesis
metadata_visibility: show
creators_name: Grillo, Lucia
title: Measurement of CP violation in B0-B0bar mixing using semileptonic decays at LHCb
subjects: ddc-500
subjects: ddc-530
divisions: i-130200
adv_faculty: af-13
cterms_swd: CP-violation
cterms_swd: Semileptonic decays
cterms_swd: LHCb
cterms_swd: Bd meson mixing
abstract: 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
id_scheme: DOI
id_number: 10.11588/heidok.00019555
ppn_swb: 1658860292
own_urn: urn:nbn:de:bsz:16-heidok-195556
date_accepted: 2015-07-22
advisor: HASH(0x55d9950a8280)
language: eng
bibsort: GRILLOLUCIMEASUREMEN2015
full_text_status: public
place_of_pub: Heidelberg, DE
citation:   Grillo, Lucia  (2015) Measurement of CP violation in B0-B0bar mixing using semileptonic decays at LHCb.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/19555/1/dissertation_luciagrillo_02062015.pdf