Results 51 to 60 of about 1,157,888 (266)
Interpreting the electron EDM constraint
Journal of High Energy Physics, 2019 The ACME collaboration has recently announced a new constraint on the electron EDM, |d e | < 1.1 × 10−29 e cm, from measurements of the ThO molecule. This is a powerful constraint on CP-violating new physics: even new physics generating the EDM at two ...
Cari Cesarotti +4 more
doaj +1 more source
Very constrained minimal supersymmetric standard models [PDF]
Physical Review D, 2004 We consider very constrained versions of the minimal supersymmetric extension of the Standard Model (VCMSSMs) which, in addition to constraining the scalar masses m_0 and gaugino masses m_{1/2} to be universal at some input scale, impose relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0. These relations may
Ellis, John +3 more
openaire +2 more sources
Charged fermions below 100 GeV
Journal of High Energy Physics, 2018 How light can a fermion be if it has unit electric charge? We revisit the lore that LEP robustly excludes charged fermions lighter than about 100 GeV.
Daniel Egana-Ugrinovic +2 more
doaj +1 more source
Time-delayed electrons from neutral currents at the LHC
Journal of High Energy Physics, 2021 We investigate long-lived particles (LLPs) produced in pair from neutral currents and decaying into a displaced electron plus two jets at the LHC, utilizing the proposed minimum ionizing particle timing detector at CMS. We study two benchmark models: the
Kingman Cheung +2 more
doaj +1 more source
Constrained Next-to-Minimal Supersymmetric Standard Model [PDF]
Physical Review Letters, 2008 We consider the fully constrained version of the next-to-minimal supersymmetric extension of the standard model (cNMSSM) in which a singlet Higgs superfield is added to the two doublets that are present in the minimal extension (MSSM). Assuming universal boundary conditions at a high scale for the soft supersymmetry-breaking gaugino, sfermion and Higgs
Djouadi, A. +2 more
openaire +3 more sources
Probing new electroweak states via precision measurements at the LHC and future colliders
Journal of High Energy Physics, 2019 Several new physics scenarios, motivated e.g. by dark matter, feature new electroweakly charged states where the lightest particle in the multiplet is stable and neutral.
Luca Di Luzio +2 more
doaj +1 more source
Fine tuning in the constrained exceptional supersymmetric standard model [PDF]
, 2013 Supersymmetric unified models in which the Z ? couples to the Higgs doublets, as in the E 6 class of models, have large fine tuning dominated by the experimental mass limit on the Z ? .
P. Athron, Maien Binjonaid, S. King
semanticscholar +1 more source
Dark matter blind spots at one-loop
Journal of High Energy Physics, 2019 We evaluate the impact of one-loop electroweak corrections to the spin-independent dark matter (DM) scattering cross-section with nucleons (σ SI), in models with a so-called blind spot for direct detection, where the leading-order prediction for the ...
Tao Han +3 more
doaj +1 more source
Baryogenesis, dark matter and inflation in the next-to-minimal supersymmetric standard model [PDF]
, 2013 A bstractExplaining baryon asymmetry, dark matter and inflation are important elements of a successful theory that extends beyond the Standard Model of particle physics. In this paper we explore these issues within Next-to-Minimal Supersymmetric Standard
C. Balázs +3 more
semanticscholar +1 more source
Supersymmetric Standard Model from the Heterotic String [PDF]
Physical Review Letters, 2006 We present a Z_6 orbifold compactification of the E_8xE_8 heterotic string which leads to the (supersymmetric) Standard Model gauge group and matter content. The quarks and leptons appear as three 16-plets of SO(10), whereas the Higgs fields do not form complete SO(10) multiplets.
Buchmüller, Wilfried +3 more
openaire +6 more sources