Authors: Schellenberg, Margarete
Title: Measurement of π˜Ύπ™‹ violation in the decay 𝘽0β†’π˜Ώβˆ—Β±π˜Ώβˆ“ with data from the LHCb experiment
Language (ISO): en
Abstract: This thesis presents the first LHCb measurement of 𝐢𝑃 violation in 𝐡0 β†’ π·βˆ—Β±π·βˆ“ decays. Due to the 𝑏 β†’ 𝑐𝑐𝑑 transition, 𝐡0 β†’ π·βˆ—Β±π·βˆ“ decays give access to higher-order Standard Model contributions. The decay-time-dependent measurement is performed on a dataset corresponding to an integrated luminosity of 9 fbβˆ’1 recorded by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The 𝐢𝑃 observables are measured with an unbinned maximum likelihood fit as π‘†π·βˆ—π· = βˆ’0.861 Β± 0.077 (stat) Β± 0.019 (syst), Ξ”π‘†π·βˆ—π· = 0.019 Β± 0.075 (stat) Β± 0.012 (syst), πΆπ·βˆ—π· = βˆ’0.059 Β± 0.092 (stat) Β± 0.020 (syst), Ξ”πΆπ·βˆ—π· = βˆ’0.031 Β± 0.092 (stat) Β± 0.016 (syst), π΄π·βˆ—π· = 0.008 Β± 0.014 (stat) Β± 0.006 (syst). To date, the analysis is the most precise single measurement of 𝐢𝑃 violation in this decay channel. All parameters are consistent with their current world average values.
Subject Headings: Flavourphysik
CP Verletzung
HEP
CERN
LHC
LHCb-Experiment
Subject Headings (RSWK): LHCb <Teilchendetektor>
Hochenergiephysik
Elementarteilchenphysik
CP-ParitΓ€t
URI: http://hdl.handle.net/2003/38418
http://dx.doi.org/10.17877/DE290R-20349
Issue Date: 2019
Appears in Collections:Experimentelle Physik V

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