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Liu, Zhen (2015) BEYOND STANDARD MODEL PHYSICS AT CURRENT AND FUTURE COLLIDERS. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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The Large Hadron Collider (LHC), a multinational experiment which began running in 2009, is highly expected to discover new physics that will help us understand the nature of the universe and begin to find solutions to many of the unsolved puzzles of particle physics. For over 40 years the Standard Model has been the accepted theory of elementary particle physics, except for one unconfirmed component, the Higgs boson. The experiments at the LHC have recently discovered this Standard-Model-like Higgs boson. This discovery is one of the most exciting achievements in elementary particle physics. Yet, a profound question remains: Is this rather light, weakly-coupled boson nothing but a Standard Model Higgs or a first manifestation of a deeper theory? Also, the recent discoveries of neutrino mass and mixing, experimental evidences of dark matter and dark energy, matter-antimatter asymmetry, indicate that our understanding of fundamental physics is currently incomplete. For the next decade and more, the LHC and future colliders will be at the cutting-edge of particle physics discoveries and will shed light on many of these unanswered questions. There are many promising beyond-Standard-Model theories that may help solve the central puzzles of particle physics. To fill the gaps in our knowledge, we need to know how these theories will manifest themselves in controlled experiments, such as high energy colliders. I discuss how we can probe fundamental physics at current and future colliders directly through searches for new phenomena such as resonances, rare Higgs decays, exotic displaced signatures, and indirectly through precision measurements on Higgs in this work. I explore beyond standard model physics effects from different perspectives, including explicit models such as supersymmetry, generic models in terms of resonances, as well as effective field theory approach in terms of higher dimensional operators. This work provides a generic and broad overview of the physics potentials of different particle physics experiments, supported by several detailed studies on characteristic physics cases to highlight the special features. The studies presented in this work provide timely and crucial knowledge highly demanded for our understanding and planning for future experiments.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Liu, Zhenzliuphys@gmail.com0000-0002-3143-1976
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairHan, Taothan@pitt.eduTHAN
Committee MemberBoudreau, Josephboudreau@pitt.eduBOUDREAU
Committee MemberLeibovich, Adamakl2@pitt.eduAKL2
Committee MemberRothstein,
Committee MemberWood-Vasey, W. Michaelwmwv@pitt.eduWMWV
Date: 27 September 2015
Date Type: Publication
Defense Date: 24 April 2015
Approval Date: 27 September 2015
Submission Date: 21 July 2015
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 407
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: LHC, Higgs, Supersymmetry, Dark Matter, VLHC, ILC, Collider, Phenomenology
Date Deposited: 27 Sep 2015 21:38
Last Modified: 15 Nov 2016 14:29


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