H. Nieto-Chaupis & G. Klämke (In collaboration with K. Mönig, H. Nowak, and A. Stahl. ) DESY-Zeuthen

100% ~50%

SHERPA SIMDET Signal Background

SHERPA PYTHIA SIMDET + PILE-UP

SHERPA (4 particles FS)

Chargino studies (G. Klämke)

Fittino: general fit of MSSM parameters by using the LC observables (e.g. cross-sections & masses). Some MSSM parameters are fitted with FITTINO (others fixed): Parameter Input Value Fit-Error without BR Fit-Error with BR (5.7%) tan b 9.0 6.29% 4.69% M1 99.54 0.092% 0.073% M2 192.57 0.140% 0.083%

Outline ●The smuon left decay into SPS1a scenario. ●A brief approach to the TESLA photon collider. ●Iterative measurements. ●Synopsis.

● The smuon left decays into SPS1a scenario. ISAJET 7.69 is used to generate the spectrum of masses, widths and BRs. Prefered mode: (~30.20%) . Other modes containing have high multiplicity final state (cascade decays from tau lepton). Charguino does decay substantially into staus. Assumption: universal BR right sleptons = 1 ( LSP candidate, m=95.5 GeV)

Slepton decays come from the coupling Slepton prefers a Wino → cascade Slepton only decays to a Bino Charguino can decay into W and staus. have more complicate decays. Cascade decays could be observed if we have high efficiency. Up to 4 muons FS could be observed SUSY also give us important background

Available final states Br Br Final State Final State 0.549633 0.006308 0.011073 0.006479 0.011084 0.004107 0.004393 0.009058 0.004512 0.044289 0.002861 0.045487 0.006308 0.028837 0.004512 0.063590 0.004649 0.002849 0.002938 0.002809 0.006479 0.000495 0.002861 0.000509 0.002938 0.000322 0.001862 0.000711 0.004107

Additional effects also take place here!! ● A brief approach to the TESLA photon collider Laser Beam Conceptual Scheme of a Gamma-Gamma Collider. Lγγ Electron Beam IP Electron Beam J=0, ECM =500 GeV CP CP Laser Beam Additional effects also take place here!! √sγγ Non-linear effects