Direct search for exotic spin zero particles in the di-lepton final state of Higgs-Z associated production in sqrt(s) = 13TeV pp collisions

LHC;ATLAS;BSM;Beyond the Standard Model;Higgs Physics;Exotic Search;Scalar;Pseudoscalar;Z Boson;Di-lepton

Ferrante, Andrew

关键词: LHC;    ATLAS;    BSM;    Beyond the Standard Model;    Higgs Physics;    Exotic Search;    Scalar;    Pseudoscalar;    Z Boson;    Di-lepton;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/102492/FERRANTE-DISSERTATION-2018.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

This thesis presents a search for a new exotic spin-0 particle a in 36.47 fb^(-1) of sqrt(s) = 13 TeV pp collisions recorded by the ATLAS detector at the LHC.This analysis is part of a broader search for a H ==> aa ==> bbbb, which uses a Higgs produced in association with a weak vector boson to improve triggering on events.The channel considered here uses Higgs-Z---associated production with two leptons in the final state.The analysis uses a likelihood-fit profile of a multivariate discriminant to place 95% confidence limit upper bounds on the cross section of the proposed signal.A study of the performance of the ATLAS Tile Calorimeter in extremely energetic events is also presented.