Results 71 to 80 of about 7,016 (168)
Probing dimension-8 SMEFT operators through neutral meson mixing
Journal of High Energy PhysicsWe investigate the impact of effective interactions of dimension-8 (dim-8) operators in the standard model effective field theory (SMEFT) on neutral meson mixing, focusing on the K 0 − K ¯ 0 $$ {K}^0-{\overline{K}}^0 $$ , B d , s − B ¯ d , s $$ {B}_{d,s}-
Yi Liao, Xiao-Dong Ma, Hao-Lin Wang
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Revisiting CMSSM with non-universal gaugino masses under current constraints
Journal of High Energy PhysicsTo address the longstanding tension between the Constrained Minimal Supersymmetric Standard Model (CMSSM) and recent experimental data, we investigate non-universal gaugino masses within an SU(5) Grand Unified Theory (GUT) framework, focusing on the g ~ $
Yabo Dong +4 more
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Exploring the BSM parameter space with neural network aided Simulation-Based Inference
Journal of High Energy PhysicsSome of the issues that make sampling parameter spaces of various beyond the Standard Model (BSM) scenarios computationally expensive are the high dimensionality of the input parameter space, complex likelihoods, and stringent experimental constraints ...
Atrideb Chatterjee +4 more
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Higgs coupling measurements and impact on the MSSM [PDF]
, 2014 Run I of the LHC has not revealed any sign of new physics beyond the Standard Model (BSM). However, the discovery of an SM-like Higgs boson with mass around 125 GeV opens up new possibilities for probing various BSM scenarios with enlarged Higgs sectors ...
Dumont, Beranger
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Prospects for Heavy Scalar Searches at the LHeC
, 2018 In this article we study the prospects of the proposed Large Hadron electron Collider (LHeC) in the search for heavy neutral scalar particles. We consider a minimal model with one additional complex scalar singlet that interacts with the Standard Model ...
Fischer, Oliver +2 more
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, 2009 If the dark matter (DM) consists of a weakly interacting massive particle (WIMP), it can be produced and studied at future collider experiments like those at the LHC. The production of collider-stable WIMPs is characterized by hard scattering events with
Chang, Spencer, de Gouvea, Andre
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Searches for power-law warped extra dimensions
Journal of High Energy PhysicsExtra dimensions with a bulk dilaton field can be power-law warped, unlike the exponential warping in the Randall-Sundrum (RS) model. We show that this mildly warped extra dimension can address the hierarchy problem with a novel Kaluza-Klein (KK ...
Sang Hui Im, Krzysztof Jodłowski
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Anatomy of $\varepsilon'/\varepsilon$ beyond the Standard Model
, 2019 We present for the first time a model-independent anatomy of the ratio $\varepsilon'/\varepsilon$ in the context of the $\Delta S = 1$ effective theory with operators invariant under QCD and QED and in the context of the Standard Model Effective Field ...
Aebischer, Jason +3 more
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Drell-Yan bounds on gapped continuum spectra
Journal of High Energy PhysicsTheories with gapped continuum spectra have gotten some attention, either as pure 4D models like unparticles, or in 5D realizations as certain soft walls constructions. In this paper, we derive experimental bounds from Drell-Yan processes (pp → ℓ + ℓ − ,
E. Arganda +6 more
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The SM expected branching ratio for h → γγ and an excess for h → Zγ
Journal of High Energy PhysicsThe recent measurements of h → Zγ from ATLAS and CMS show an excess of the signal strength μ Z = σ · B obs / σ · B SM $$ {\left(\sigma \cdotp \mathcal{B}\right)}_{\textrm{obs}}/{\left(\sigma \cdotp \mathcal{B}\right)}_{\textrm{SM}} $$ = 2.2 ± 0.7 ...
Xiao-Gang He +3 more
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