Results 51 to 60 of about 13,430 (234)
Constraints on the NMSSM from the Oblique Parameters
Advances in High Energy Physics, Volume 2013, Issue 1, 2013., 2013 Electroweak precision measurements, encoded in the oblique parameters, give strong constraints on physics beyond the Standard Model. The oblique parameters S, T, U(V, W, X) are calculated in the next‐to‐minimal supersymmetric model (NMSSM). We outline the calculation of the oblique parameters in terms of one‐loop gauge‐boson self‐energies and find ...
Markos Maniatis +2 more
wiley +1 more source
Chargino production at LEP 200
Zeitschrift f�r Physik C Particles and Fields, 1992 We study chargino production and decay in the energy region of LEP 200, exploring the relevant supersymmetry parameter space. We give numerical predictions for the cross sections and for the signaturesl++l−+p′, l+jet+p′, jet+jet+p′. New formulae are presented relating chargino masses and couplings to the supersymmetry parameters.
A. Bartl +3 more
openaire +1 more source
The R-parity violating decays of charginos and neutralinos in the B-L MSSM
Journal of High Energy Physics, 2019 The B − L MSSM is the MSSM with three right-handed neutrino chiral multiplets and gauged B − L symmetry. The B − L symmetry is broken by the third family right-handed sneutrino acquiring a VEV, thus spontaneously breaking R-parity. Within a natural range
Sebastian Dumitru +2 more
doaj +1 more source
Oblique Corrections in the MSSM at One‐Loop—Part I: Scalars
Advances in High Energy Physics, Volume 2013, Issue 1, 2013., 2013 This paper is devoted to reconsider the one‐loop oblique corrections arising from the scalar superpartners in the MSSM, that is, the squarks, the sleptons, and the scalars in Higgs sector. We explicitly present the complete one‐loop forms of self‐energy corrections to the gauge bosons of SM electroweak gauge groups, as well as their descendants the S ...
Yao Yu, Sibo Zheng, Elias C. Vagenas
wiley +1 more source
Chargino production at the ILC
, 2020 The lighter chargino, $\widetilde _1^{\pm}$, is a prime candidate to be the next-to-lightest SUSY particle (the NLSP). Several analyses of $\widetilde _1^{\pm}$ pair-production at the ILC, at specific model-points, have been performed, showing that detection and property-determination is possible, even for very difficult cases.
Nunez Pardo De Vera, Maria Teresa +2 more
openaire +3 more sources
Heavy Chiral Fermions and Dark Matter
Advances in High Energy Physics, Volume 2013, Issue 1, 2013., 2013 Dark matter presents perhaps one of the most compelling direct indications of new physics beyond the standard model with three generations of fermions. In this paper, we survey several scenarios for dark matter in association with a fourth generation of chiral matter.
Johan Alwall, Jusak Tandean, Tao Han
wiley +1 more source
A Comparative Study of Dark Matter in the MSSM and Its Singlet Extensions: A Mini Review
Advances in High Energy Physics, Volume 2012, Issue 1, 2012., 2012 In this note we briefly review the recent studies of dark matter in the MSSM and its singlet extensions: the NMSSM, the nMSSM, and the general singlet extension. Under the new detection results of CDMS II, XENON, CoGeNT, and PAMELA, we find that (i) the latest detection results can exclude a large part of the parameter space which is allowed by current
Wenyu Wang, Ulrich Ellwanger
wiley +1 more source
Phenomenology of the chargino and neutralino systems [PDF]
AIP Conference Proceedings, 2001 The chargino and neutralino pair production processes at $e^+e^-$ collisions are explored to determine the underlying SUSY parameters. The sum rules for the couplings are used to check the closure of two-chargino and four-neutralino systems in the minimal supersymmetric extension of the standard model.
openaire +2 more sources
Supersymmetry spectroscopy in stop-chargino production at CERN LHC [PDF]
Physical Review D, 2006 We consider the process of associated stop-chargino production in the MSSM at LHC and show that, at the simplest Born level, the production rate is dramatically sensitive to the choice of the benchmark points, oscillating from potentially "visible" maxima of the picobarn size to much smaller, hardly "visible", values.
BECCARIA, Matteo +4 more
openaire +6 more sources
Normal tau polarisation as a sensitive probe of CP violation in chargino decay
, 2010 CP violation in the spin-spin correlations in chargino production and subsequent two-body decay into a tau and a tau-sneutrino is studied at the ILC. From the normal polarisation of the tau, an asymmetry is defined to test the CP-violating phase of the
Anja Marold +27 more
core +1 more source