Edinburgh Research Archive logo

Edinburgh Research Archive

University of Edinburgh homecrest
View Item 
  •   ERA Home
  • Physics, School of
  • Physics thesis and dissertation collection
  • View Item
  •   ERA Home
  • Physics, School of
  • Physics thesis and dissertation collection
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

Studies of b Hadron decays to Charmonium, the LHCb upgrade and operation

View/Open
Gizdov2022.pdf (12.39Mb)
Date
11/04/2022
Author
Gizdov, Konstantin
Metadata
Show full item record
Abstract
Precise measurements of CP violation provide stringent tests of the Standard Model towards the search for signs of new physics. Using LHC proton-proton collision data, collected by the LHCb detector during 2015 and 2016 at the centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 1.9 fb−1 , presented is the latest measurement of the CP -violating phase, ϕs , using B 0 s → J/ψϕ decays. The machine-learning-based data selection, data-driven corrections to simulated event samples, and the control of systematic effects using dedicated samples are discussed. The values ϕs = −0.083±0.041±0.006 rad, ∆Γs = 0.077± 0.008±0.003 ps−1 (i.e. the decay width difference between the light and the heavy mass eigenstates in the B 0 s system) and Γs −Γd = −0.0041±0.0024±0.0015 ps−1 (i.e. the difference of the average B 0 s and B 0 d meson decay widths) are obtained, yielding the World’s most precise determination of these quantities 1 . Furthermore, shown are the efforts and contributions towards the LHCb Upgrade: the quality assurance and testing of the LHCb RICH Upgrade components, and the redesign and upgrade of the fully online software trigger – LHCb HLT Upgrade. Regarding the former, an original implementation of a parallelised, robust and highly available automation system is introduced. In connection to the latter, a novel neural network architecture and optimisation methods are laid out, enabling complex machine learning to be performed in a low latency high-throughput environment. Those directly influence the future deployment of the experiment and its data collecting and analysis capabilities. Thus, they are essential for future more precise and stringent research.
URI
https://hdl.handle.net/1842/38870

http://dx.doi.org/10.7488/era/2124
Collections
  • Physics thesis and dissertation collection

Library & University Collections HomeUniversity of Edinburgh Information Services Home
Privacy & Cookies | Takedown Policy | Accessibility | Contact
Privacy & Cookies
Takedown Policy
Accessibility
Contact
feed RSS Feeds

RSS Feed not available for this page

 

 

All of ERACommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsPublication TypeSponsorSupervisorsThis CollectionBy Issue DateAuthorsTitlesSubjectsPublication TypeSponsorSupervisors
LoginRegister

Library & University Collections HomeUniversity of Edinburgh Information Services Home
Privacy & Cookies | Takedown Policy | Accessibility | Contact
Privacy & Cookies
Takedown Policy
Accessibility
Contact
feed RSS Feeds

RSS Feed not available for this page