Results 71 to 80 of about 15,279 (232)

Probing heavy charged fermions at e + e − collider using the optimal observable technique

open access: yesJournal of High Energy Physics, 2022
In this work we study the production of color-neutral and singly-charged heavy leptons at the proposed International Linear Collider. We use the optimal observable technique to determine the statistical accuracy to which the coupling of such fermions to ...
Subhaditya Bhattacharya   +2 more
doaj   +1 more source

Dark Matter: A Primer

open access: yesAdvances in Astronomy, Volume 2011, Issue 1, 2011., 2011
Dark matter is one of the greatest unsolved mysteries in cosmology at the present time. About 80% of the Universe′s gravitating matter is nonluminous, and its nature and distribution are for the most part unknown. In this paper, we will outline the history, astrophysical evidence, candidates, and detection methods of dark matter, with the goal to give ...
Katherine Garrett   +2 more
wiley   +1 more source

Phases in the gaugino sector: direct reconstruction of the basic parameters and impact on the neutralino pair production

open access: yes, 1999
We consider recovering analytically the (generally complex) parameters $\mu$, $M_1$ and $M_2$ of the gaugino and Higgsino Lagrangian, from appropriate physical input in the chargino and neutralino sectors.
A. Bartl   +45 more
core   +1 more source

Search for new physics in trilepton events and limits on the associated chargino-neutralino production at CDF [PDF]

open access: yes, 2013
We perform a search for new physics using final states consisting of three leptons and a large imbalance in transverse momentum resulting from proton-antiproton collisions at 1.96 TeV center-of-mass energy.
T. Aaltonen   +411 more
semanticscholar   +1 more source

Search for supersymmetry in events with a τ lepton pair and missing transverse momentum in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

open access: yesJournal of High Energy Physics, 2018
A search for the electroweak production of supersymmetric particles in proton-proton collisions at a center-of-mass energy of 13 TeV is presented in final states with a τ lepton pair.
The CMS collaboration   +2298 more
doaj   +1 more source

Muon g−2 in MSSM gauge mediation revisited

open access: yesPhysics Letters B, 2017
The Higgs boson of 125 GeV requires large stop masses, leading to the large μ-parameter in most cases of gauge mediation. On the other hand, the explanation for the muon g−2 anomaly needs small slepton and neutralino/chargino masses.
Tsutomu T. Yanagida, Norimi Yokozaki
doaj   +1 more source

Timelike transition form factor for CP-odd Higgs boson production

open access: yesSciPost Physics Proceedings, 2022
We investigate the production of CP-odd Higgs boson $A^0$ associated with a real $\gamma$ in $e^+e^-$ collisions. Because of the properties of $A^0$ coupling to the other fields, the main contribution comes from the top-quark triangle loop diagrams ...
Ken Sasaki, Tsuneo Uematsu
doaj   +1 more source

Higgs and Supersymmetric Particle Signals at the Infrared Fixed Point of the Top Quark Mass [PDF]

open access: yes, 1994
We study the properties of the Higgs and supersymmetric particle spectrum associated with the infrared fixed point solution of the top quark mass in the MSSM.
Abachi   +125 more
core   +2 more sources

Neutralino and chargino production in U(1)′ at the LHC [PDF]

open access: yes, 2012
We examine the production and decay modes of neutralinos and charginos in a softly-broken supersymmetric model with an extra Abelian symmetry U(1)′. We perform the study in a U(1)′ model with a secluded sector, where the tension between the electroweak ...
M. Frank, L. Selbuz, I. Turan
semanticscholar   +1 more source

On-shell renormalization of the chargino and neutralino masses in the MSSM [PDF]

open access: yes, 2011
We discuss the choice of input parameters for the renormalization of the chargino and neutralino sector in the minimal supersymmetric standard model (MSSM) in the on-shell scheme. We show that one should chose the masses of a bino-like, a wino-like and a
A. Chatterjee   +3 more
semanticscholar   +1 more source

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