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Radiative Corrections for ZH Production at Electron-Positron Collider

Song, Qian (2023) Radiative Corrections for ZH Production at Electron-Positron Collider. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Current experimental measurements on Higgs boson properties are consistent with the Standard Model(SM) predictions, but large experimental uncertainties still leave room for the possibility of new physics. To reduce experimental uncertainties, a so-called "Higgs factory" including the International Linear Collider (ILC) \cite{ilc1,ilc2}, Future Circular Collider (FCC-ee)\cite{fccee}, and Circular Electron-Positron Collider (CEPC) \cite{cepc}, has been proposed. The main production channel of Higgs boson in these $e^+e^-$ colliders is the Higgsstrahlung process, $e^+e^-\to ZH$, which is projected to be measured with sub-percent level precision at these facilities (1.2$\%$ at ILC, 0.4$\%$ at FCC-ee, and 0.5$\%$ at CEPC). Reducing the theoretical uncertainty to the same level as the experimental one is crucial to prevent theoretical errors from dominating when extracting Higgs couplings, and this constitutes a significant part of this thesis, in which the largest missing contribution, the next-to-next-to-leading order(NNLO) electroweak corrections, will be presented. Moreover, the increasing experimental accuracy will impose stringent bounds on new physics. The thesis also investigates one specific class of new physics, fermionic dark matter, as a possible explanation for potential deviations on the cross section of the Higgsstrahlung process, and explores the parameter space that may be probed at future Large Hadron Collider(LHC).


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Song, Qianqis26@pitt.eduqis26
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairFreitas,
Committee MemberBatell,
Committee MemberBoudreau, Joseph
Committee MemberLiu, W.
Committee MemberMorningstar,
Date: 6 September 2023
Date Type: Publication
Defense Date: 2 June 2023
Approval Date: 6 September 2023
Submission Date: 26 July 2023
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 214
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Physics
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: High-energy phenomenology, radiative corrections
Date Deposited: 07 Sep 2023 01:19
Last Modified: 07 Sep 2023 01:19


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