Results 71 to 80 of about 7,925 (256)
Neutralino-neutralino annihilation to gammaZ in MSSM
, 2006 The 1-loop computation of the processes $\tchi_i \tchi_j \to Z$ has been performed at an arbitrary c.m. energy for any pair of MSSM neutralinos. As an application suitable for Dark Matter (DM) searches, the neutralino-neutralino annihilation is studied at the limiting case of vanishing relative velocity, describing the present DM distribution in the ...
Diakonidis, Th. +4 more
openaire +3 more sources
Physical Review D, 1999 We investigate the possibility to detect neutralino dark matter in a scenario in which the galactic dark halo is clumpy. We find that under customary assumptions on various astrophysical parameters, the antiproton and continuum gamma-ray signals from neutralino annihilation in the halo put the strongest limits on the clumpiness of a neutralino halo. We
L. BERGSTROM +3 more
openaire +2 more sources
Light neutralino dark matter inU(1)′models [PDF]
, 2014 We analyze the prospects for light neutralino dark matter in the minimal supersymmetric model extended by a $U(1)$ gauge group. We allow the neutralino to be an arbitrary admixture of singlet and doublet higgsinos, as well as of the three gauginos, and ...
M. Frank, S. Mondal
semanticscholar +1 more source
Two Higgs Bosons near 125 GeV in the Complex NMSSM and the LHC Run I Data
Advances in High Energy Physics, Volume 2015, Issue 1, 2015., 2015 We analyse the impact of explicit CP‐violation in the Higgs sector of the Next‐to‐Minimal Supersymmetric Standard Model (NMSSM) on its consistency with the Higgs boson data from the Large Hadron Collider (LHC). Through detailed scans of the parameter space of the complex NMSSM for certain fixed values of one of its CP‐violating (CPV) phases, we obtain ...
Stefano Moretti +2 more
wiley +1 more source
Associated neutralino-neutralino-photon production at NLC
, 2001 3 pages, 6 figures, uses RevTeX4.
Baer, Howard, Belyaev, Alexander
openaire +2 more sources
Neutralino oscillations at the LHC [PDF]
Physical Review D, 2013 We study a supersymmetric phenomenon that can give spectacular signals at the LHC: oscillations of neutralinos. Such oscillations can be naturally realised in R-symmetric models, where additional fields are introduced as Dirac mass partners of gauginos and Higgsinos. Majorana masses for gauginos, necessarily generated from anomaly mediation, can create
Grossman, Yuval +2 more
openaire +2 more sources
TeV SUSY dark matter confronted with the current direct and indirect detection data
European Physical Journal C: Particles and Fields, 2019 In the minimal supersymmetric standard model (MSSM) the lightest superparticle (LSP) can be a TeV neutralino (mainly dominated by higgsino or wino) which serves as a dark matter candidate with correct thermal relic density. In this work we confront the 1–
Murat Abdughani, Jie Ren, Jun Zhao
doaj +1 more source
Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector [PDF]
, 2013 A search is presented for direct chargino production based on a disappearing-track signature using 20.3 fb(-1) of proton-proton collisions at root s = 8 TeV collected with the ATLAS experiment at t ...
Atlas Collaboration
semanticscholar +1 more source
Status of LHC Searches for SUSY without R‐Parity
Advances in High Energy Physics, Volume 2015, Issue 1, 2015., 2015 In this contribution we briefly review the status of current searches for supersymmetry at the Large Hadron Collider, focusing especially on viable sub‐TeV colored superpartners which can appear in nonstandard scenarios. The presented material covers mostly signals that do not crucially rely on the presence of large missing transverse momentum, with ...
Roberto Franceschini, Michal Malinský
wiley +1 more source
First LHC constraints on neutralinos [PDF]
Physics Letters B, 2012 The ATLAS and CMS collaborations have recently reported tantalizing hints of the existence of a 125 GeV Higgs--like particle, whose couplings appear to match well the Standard Model (SM) expectations. In this work, we study implications of this observation for the neutralino sector of supersymmetric models, assuming that the Higgs signal gets confirmed.
Dreiner, H., Kim, J., Lebedev, O.
openaire +5 more sources