Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userPhysics performances for Scalar Electrons, Scalar Muons and Scalar Neutrinos searches at CLIC
90
0
0.0
(
0
)
Ask ChatGPT about the research
No Arabic abstract
The determination of scalar leptons and gauginos masses is an important part of the program of spectroscopic studies of Supersymmetry at a high energy linear collider. In this talk we present results of a study of pair produced Scalar Electrons, Scalar Muons and Scalar Neutrinos searches in a Supersymmetric scenario at 3 TeV at CLIC. We present the performances on the lepton energy resolution and report the expected accuracies on the production cross sections and on the scalar leptons and gauginos masses.
rate research
Read More
The determination of smuon and neutralino masses in smuon pair production is an important part of the program of spectroscopic studies of Supersymmetry at a high energy linear collider. In this note we report the first results of a study of e+e- -> ~mu_R+ ~mu_R- in a high-mass, cosmology-motivated Supersymmetric scenario at 3 TeV at CLIC. This process is a good example to study requirements on the beam energy spectrum and polarisation and the track momentum resolution in a simple final state. We discuss the expected accuracy on the mass measurements as a function of the momentum resolution, luminosity spectrum, beam polarisation and time stamping capability. Results obtained at generator level are validated by comparison to full simulation and reconstruction. Preliminary requirements for the detector performances and beam polarisation are presented.
The determination of scalar lepton and gaugino masses is an important part of the programme of spectroscopic studies of Supersymmetry at a high energy e+e- linear collider. In this article we present results of a study of the processes: e+e- -> eR eR -> e+e- chi0 chi, e+e- -> muR muR -> mu mu- chi0 chi0, e+e- -> eL eL -> e e chi0 chi0 and e+e- -> snu_e snu_e -> e e chi+ chi-in two Supersymmetric benchmark scenarios at 3 TeV and 1.4 TeV at CLIC. We characterize the detector performance, lepton energy resolution and boson mass resolution. We report the accuracy of the production cross section measurements and the eR muR, snu_e, chi+ and chi0 mass determination, estimate the systematic errors affecting the mass measurement and discuss the requirements on the detector time stamping capability and beam polarization. The analysis accounts for the CLIC beam energy spectrum and the dominant beam-induced background. The detector performances are incorporated by full simulation and reconstruction of the events within the framework of the CLIC_ILD_CDR detector concept.
Extra neutral gauge bosons (Z) are predicted in many extensions of the Standard Model (SM). In the minimal anomaly-free Z model (AFZ), the phenomenology is controlled by only three parameters beyond the SM ones, the Z mass and two effective coupling constants g_Y and g_{BL}. We study the Z 5-sigma discovery potential in e+e- collisions at 1.4 and 3 TeV CLIC. Assuming LHC discovers a Z of 5 TeV mass, the expected accuracies on the Zmu+mu- couplings are presented. We discuss also the requirements on detector performance and beam polarization.
We study a softly-broken supersymmetric model whose gauge symmetry is that of the standard model (SM) gauge group times an extra Abelian symmetry U(1). We call this gauge-extended model U(1) model, and we study a U(1) model with a secluded sector such that neutrinos acquire Dirac masses via higher-dimensional terms allowed by the U(1) invariance. In this model the mu term of the minimal supersymmetric model (MSSM) is dynamically induced by the vacuum expectation value of a singlet scalar. In addition, the model contains exotic particles necessary for anomaly cancellation, and extra singlet bosons for achieving correct Z/Z mass hierarchy. The neutrinos are charged under U(1), and thus, their production and decay channels differ from those in the MSSM in strength and topology. We implement the model into standard packages and perform a detailed analysis of sneutrino production and decay at the Large Hadron Collider, for various mass scenarios, concentrating on three types of signals: (1) 0lep+ MET,(2) 2lep+MET, and (3) 4lep + MET. We compare the results with those of the MSSM whenever possible, and analyze the SM background for each signal. The sneutrino production and decays provide clear signatures enabling distinction of the U(1) model from the MSSM at the LHC.
Topological searches for neutral scalar bosons S0 produced in association with a Z0 boson via the Bjorken process e+e- to SZ at centre-of-mass energies of 91GeV and 183-209GeV are described. These searches are based on studies of the recoil mass spectrum of Z to electrons or muons, and on a search for SZ with Z to neutrinos and S to e+e- or photons. They cover the decays of the S into an arbitrary combination of hadrons, leptons, photons and invisible particles as well as the possibility that it might be stable. No indication for a signal is found in the data and upper limits on the cross section of the Bjorken process are calculated. Cross-section limits are given in terms of a scale factor k with respect to the SM cross section for the Higgs-strahlung process e+e- to HZ. These results can be interpreted in general scenarios independently of the decay modes of the S. The examples considered here are the production of a single new scalar particle with a decay width smaller than the detector mass resolution, and for the first time, two scenarios with continuous mass distributions, due to a single very broad state or several states close in mass.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
