prikaz prve stranice dokumenta Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment
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master's thesis
Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment
2022. urn:nbn:hr:166:735715
Mandarić, Marko
University of Split
Faculty of Science
Department of Physics

Cite this document

Mandarić, M. (2022). Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment (Master's thesis). Split: University of Split, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:166:735715

Mandarić, Marko. "Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment." Master's thesis, University of Split, Faculty of Science, 2022. https://urn.nsk.hr/urn:nbn:hr:166:735715

Mandarić, Marko. "Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment." Master's thesis, University of Split, Faculty of Science, 2022. https://urn.nsk.hr/urn:nbn:hr:166:735715

Mandarić, M. (2022). 'Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment', Master's thesis, University of Split, Faculty of Science, accessed 25 December 2024, https://urn.nsk.hr/urn:nbn:hr:166:735715

Mandarić M. Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment [Master's thesis]. Split: University of Split, Faculty of Science; 2022 [cited 2024 December 25] Available at: https://urn.nsk.hr/urn:nbn:hr:166:735715

M. Mandarić, "Optimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment", Master's thesis, University of Split, Faculty of Science, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:166:735715

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Metadata
TitleOptimisation of the search for new high mass Higgs bosons in the four-lepton channel with the CMS experiment
Title (croatian)Optimizacija potrage za novim Higgsovim bozonima na visokim masama u kanala raspada na četiri leptona s CMS eksperimentom
AuthorMarko Mandarić
MentorToni Šćulac (mentor)
MentorChristophe Ochando https://orcid.org/0000-0002-3836-1173 (pomoć pri izradi, neposredni voditelj)
Committee memberToni Šćulac (predsjednik povjerenstva)
Committee memberMarko Kovač (član povjerenstva)
Committee memberAndro Petković (član povjerenstva)
GranterUniversity of Split
Faculty of Science
(Department of Physics)
Split
Defense date and country2022-09-30, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract
Research of some possible optimisations of the high-mass Higgs boson decaying to 4 leptons analysis is presented. The full Run 2 data (2015-2018) collected by the CMS experiment in the Large Hadron Collider is used. The study is carried out as part of the effort to make the search for new scalars (heavy Higgs bosons) more efficient. There are three parts of the analysis conducted. The first is comparing two data samples, before and after an updated calibration of the detector. Next, a study is performed to try to determine whether it is possible to loosen some restrictions in the analysis with a goal of improving the results, while also controlling the "explosion" of noise events. Finally, categorisation of the production mode of the events (how the Higgs boson is created) is explored, taking into consideration the values of the discriminating variables. For each topic, the methods of work are explained and results shown.
Abstract (croatian)
U ovom radu prezentiraju se rezultati istraživanja mogućih poboljšanja u analizi raspada Higgsovog bozona visoke mase na 4 leptona. Korišteni su podaci CMS eksperimenta iz Velikog hadronskog sudarača u CERN-u, skupljeni od 2015. do 2018. godine, tzv. Run 2. Izvodi se u studija u sklopu povećanja efikasnosti u potrazi za novim skalarima, tj. Higgsovim bozonima visokih masa. Provedena su tri tipa analize. Za početak, prikazana je usporedba dvaju uzoraka podataka. Jedan od njih nastao je prije, a drugi nakon kalibracije detektora u 2019. godini. Usporedba je ranije provedena za Higgsov bozon iz Standardnog Modela, onaj mase 125 GeV , a ovo je prva provjera u analizi visoke mase. Nadalje, proučava se potencijalno poboljšanje analize popuštanjem nekih zahtjeva u njoj. Uspoređuje se eventualni benefit relaksacije granične vrijednosti sa količinom dodatnih pozadinskih smetnji koje mogu otežati analizu. Konačno, istražuju se produkcijski mehanizmi Higgsovog bozona i kategorizacija samih produkcijskih događaja u analizi visoke mase promatrajući ponašanje vrijednosti određenih diskriminacijskih varijabli. Za svaku je temu objašnjena metoda i pokazani rezultati istraživanja.
Keywords
Keywords (croatian)
Languageenglish
URN:NBNurn:nbn:hr:166:735715
Study programmeTitle: Physics; specializations in: major in teaching, major in Astrophysics, major in Biophysics, major in Enviromental physics, major in Computational physics, major in Astrophysics and physics of elemental particles
Course: major in Astrophysics and physics of elemental particles
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra fizike (magistar/magistra fizike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2023-02-17 12:56:35