H. Nieto-Chaupis

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H. Nieto-Chaupis G.
Klämke (In collaboration with K. Mönig, H. Nowak,
and A. Stahl. )
DESY-Zeuthen
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SHERPA
SIMDET
Signal
Background
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SHERPA
PYTHIA
SIMDET PILE-UP
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SHERPA (4 particles FS)
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Chargino studies (G. Klämke)
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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-Errorwithout 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
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Outline ?The smuon left decay into SPS1a
scenario. ?A brief approach to the TESLA photon
collider. ?Iterative measurements. ?Synopsis.
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? 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,
m95.5 GeV)








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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
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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
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? A brief approach to the TESLA photon collider
Laser Beam
Conceptual Scheme of a Gamma-Gamma Collider.
L??
Electron Beam
Electron Beam
J0, ECM 500 GeV
IP
CP
CP
Laser Beam
Additional effects also take place here!!
vs??
Non-linear effects
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