Search for Exotic Decay of A Higgs Boson into A Dark Photon and a Standard Model Photon in pp Collisions at √s = 13 TeV

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/77101

Title:	Search for Exotic Decay of A Higgs Boson into A Dark Photon and a Standard Model Photon in pp Collisions at √s = 13 TeV
Authors:	汪本璿;Wang, Pen-Hsuan
Contributors:	物理學系
Keywords:	稀有希格斯衰變;緊湊渺子線圈;大強子對撞機緊湊渺子線圈;Dark photon;Exotic Higgs decay;Large Hadron Collider;Compact Moun Solenoid;Hidden sector
Date:	2018-07-19
Issue Date:	2018-08-31 13:57:12 (UTC+8)
Publisher:	國立中央大學
Abstract:	有關暗光子的理論主要是出自於早期天文物理觀測的結果與現有理論不符合，這些觀測結果指出新物理的存在。為了解釋觀測結果，理論學家延伸自標準模型 U(1)群，在 Hidden Sector 中建立了一個新的假設性的 U(1)群。暗光子為此假設性的 U(1)群的介子。歐洲核子物理研究所的大強子對撞機為目前世界上對撞能量最高且高亮度的質子質子對撞機，因此擁有龐大的潛能來尋找 GeV 質量尺度的暗光子。本篇論文利用質子-質子質心能量√s = 13 TeV 的對撞產生希格斯粒子，暗光子則藉由希格斯粒子的稀有衰變來產生，並且通過暗光子的渺子衰變頻道來尋找新的渺子-渺子對不變質量共振來尋找暗光子，此研究使用 2016 年全年度 CMS 所蒐集的資料進行分析，總亮度為35.9fb-1。;The hypothesis of Dark Photon(ZD) is motivated by a number of astrophysi- cal observational anomalies which indicate the new physics beyond Standard Model(SM) is existing in our world. The Hidden Sector contains a hypothetical U (1)D gauge group is introduced by extension of the SM. The ZD is a theoretical particle which does not play a role as Dark Matter(DM) itself but play a role as gauge mediator of hypothetical hidden U(1)D gauge group. With the advent of the Large Hadron Collider(LHC), a powerful machine with unprecedented high central-of-mass energies and high luminosities gives the potential to probe the GeV scale ZD. The searches of ZD from exotic Higgs decays and decaying into a muon pair in pp collision with √s = 13 TeV is ongoing by looking for new dilepton invariant mass in sub-GeV scale. This analysis using full 2016 data recorded by CMS detector in integrated luminosity 35.9 fb−1.
Appears in Collections:	[Graduate Institute of Physics] Electronic Thesis & Dissertation

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