1,722,030 research outputs found
Collider phenomenology of Higgsless models
No full textWe study the LHC signatures of new gauge bosons in the minimal deconstruction Higgsless model (MHLM). We analyze the W' signals of pp\to W' \to WZ and pp\to W'jj \to WZjj processes at the LHC, including the complete signal and background calculation in the gauge invariant model and have demonstrated the LHC potential to cover the whole parameter space of the MHLM model. <br/
Minimal Consistent Dark Matter Models
No full text55th Rencontres de Moriond on QCD and High Energy Interactions (Moriond QCD 2021)27 March-3 April 2021. Online Conference, Online, Italy (C21-03-27
Decoding the nature of Dark Matter at current and future experiments
No full textDetermination of the nature of Dark Matter (DM) is one of the most fundamental problems of particle physics and cosmology. If DM is light enough and interacts with Standard Model particles directly or via some mediators with a strength beyond the gravitational one, it can be probed at particle accelerators or in complementary direct and indirect DM searches in non-collider experiments. In the absence of such signals at present we can prepare ourselves for its discovery and identification. Generic signature from DM produced in particles collisions is missing transverse energy, MET, originating from DM particles escaping detector. Using effective field theory approach one can show that, depending on the structure and DM spin, effective operators have different MET distributions. This provides potential to distinguish certain classes of effective field theory (EFT) operators and related spin of DM at the LHC. This observation can be directly applied to theories beyond EFT paradigm as we demonstrate for Supersymmetry and inert two Higgs doublet model (i2HDM) as two examples. At the same time direct and indirect DM searches strongly complement collider searches for DM with large masses and pointing that collider and non-collider DM searches have unique power to probe the nature of Dark Matter. We also highlight prospects of new collider signature from DM such as disappearing charge tracks which are characteristic for wide class of DM theories. Finally, we advocate the importance of the joint framework which would join efforts of HEP community and allow to effectively identify the underlying theory of DM.</p
Phenomenology of Light MSSM Higgs boson scenario
No full textWe have found that in the MSSM, the possibility for the lightest CP-even Higgs boson to be lighter than Z boson (as low as about 60 GeV) is, contrary to the usual belief, not yet excluded by LEP2 Higgs search nor any direct searches for supersymmetric particles at high energy colliders. The Light Higgs boson scenario (LHS) is realised when the ZZh coupling and the decay branching ratio Br (h/A → bb‾) are simultaneously suppressed as a result of generic supersymmetric loop corrections. Consequently, the W± H± h coupling has to be large due to the sum rule of Higgs couplings to weak gauge bosons and as we demonstrate, the associate neutral and charged Higgs boson production process, pp → H± h (A), at the LHC can completely probe the LHS. <br/
Supersymmetry status and phenomenology at the Large Hadron Collider
No full textLarge Hadron Collider (LHC) has a great chance to finally reveal supersymmetry which remains a compelling theory for over 30 years in spite of lack of its discovery.It might be around the corner the present LHC era with sensitive dark matter search experiments and international linear collider hopefully coming up in the near future
SUSY:Theory Status in the Light of Experimental Constraints
No full textSupersymmetry remains compelling theory over 30 years in spite of lack of its discovery. It could be already near the corner our days, therefore present and upcoming experiments are crucial for constraining or even discovery of the supersymmetry
Measurement of the -channel single top quark production cross section in collisions at TeV
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