Selectron Pair Production at e-e- and e+e- Colliders with Polarized Beams

Abstract

We investigate selectron pair production and decay in e-e- scattering and e+e- annihilation with polarized beams taking into account neutralino mixing as well as ISR and beamstrahlung corrections. One of the main advantages of having both modes at disposal is their complementarity concerning the threshold behaviour of selectron pair production. In e-e- the cross sections at threshold for seleectron_R selectron_R and selectron_L selectron_L rise proportional to the momentum of the selectron and in e+ e- that for selectron_R selectron_L. Measurements at threshold with polarized beams can be used to determine the selectron masses precisely. Moreover we discuss how polarized electron and positron beams can be used to establish directly the weak quantum numbers of the selectrons. We also use selectron pair production to determine the gaugino mass parameter M_1. This is of particular interest for scenarios with non-universal gaugino masses at a high scale resulting in |M_1| << |M_2| at the electroweak scale. Moreover, we consider also the case of a non-vanishing selectron mixing and demonstrate that it leads to a significant change in the phenomenology of selectrons.

LaTex, 23 pages, 14 figures, v2, typos corrected, version to appear in Eur.Phys.J.C

Cited by in corpus (20)

• SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
• The role of polarized positrons and electrons in revealing fundamental interactions at the Linear Collider
• Physics at the e+ e- Linear Collider
• Polarisation in Sfermion Decays: Determining \tanβand Trilinear Couplings
• Probing neutrino properties with charged scalar lepton decays
• Systematic study of the impact of CP-violating phases of the MSSM on leptonic high-energy observables
• CP violation in selectron cascade decays e_L -> e X_2^0 -> e X_1^0 mu+ mu-
• Analysis of the Neutralino System in Two--Body Decays of Neutralinos
• Measuring a Light Neutralino Mass at the ILC: Testing the MSSM Neutralino Cold Dark Matter Model
• Testing the Majorana nature of neutralinos in supersymmetric theories
• Selectron production at an e-e- linear collider with transversely polarized beams
• Spin Asymmetries in Squark and Gluino Production at Polarized Hadron Colliders
• Event shape discrimination of supersymmetry from large extra dimensions at a linear collider
• Slepton Production at e+e- Colliders in the Complex MSSM: A Full One-Loop Analysis
• Four-jet final state in same-sign lepton colliders and neutrinoless double beta decay mechanisms
• Physics aspects of polarized e+ at the linear collider
• Sfermion Precision Measurements at a Linear Collider
• Resolving a challenging supersymmetric low-scale seesaw scenario at the ILC
• Supersymmetry Working Group: Summary Report
• New physics searches at a Linear Collider with polarized beams