Jul 17 – 24, 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Nailing Natural SUSY: Higgsino Parameter Determination at the ILC

Not scheduled
KTH and Stockholm University Campus

KTH and Stockholm University Campus

Poster Presentation Higgs and New Physics


Hale Sert (DESY)


In unconstrained SUSY models, the most natural value for the mu parameter is not far from the Z^0 mass, predicting the lightest gauginos to be higgsino-like and nearly degenerate in mass, with mass splittings of a few GeV or even of less than a GeV. At the ILC, chi_1^0 chi_2^0 and chi_1^+ chi_1^- production can be detected via the recoil against hard photon radiation and even sub-GeV mass differences can be reconstructed from the kinematics of the very soft visible decay products. The expected precisions on the polarised cross sections, on the chi_1^+- and chi_2^0 masses and on their mass differences to the chi_1^0 have been investigated with the ILD detector concept at the centre-of-mass energies of 350 and 500 GeV, taking into account realistic assumptions on the beam parameters and beam-induced backgrounds. From these observables alone, the mu parameter can be determined to the level of a few percent, while M_1 and M_2 can be constrained within 10-20% even if they are in the multi-TeV regime.

Primary authors

Hale Sert (DESY) Jenny List (Deutsches Elektronen-Synchrotron (DE)) Mikael Berggren (Deutsches Elektronen-Synchrotron (DE))

Presentation materials