[SEMINARI]: Dr. Bloechinger: Determination of Gaugino Mass Parameters in various Linear Collider Modes

[Arcadi Santamaria]

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                              S E M I N A R I

             [Image]   Departament de Física Teòrica    [Image]
                          Universitat de València
                       Institut de Física Corpuscular
                       Universitat de València - CSIC

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       Determination of Gaugino Mass Parameters in various Linear Collider
                                      Modes

                            Dr Claus Bloechinger

                             (Univ of Wuerzburg)

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                              Seminari del IFIC
                   Tuesday 22 of May of 2001 at 04:00 PM
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                                    Resum

 After the LHC the planed Linear Collider (LC) will be the next step in the
  search for physics beyond the Standard Model. The Minimal Supersymmetric
 Standard Model (MSSM) is one of the favoured candidates of this search. It
  is one of the aims of a LC to determine the underlying parameters of the
MSSM with high precision. One of the free parameters of the MSSM is the U(1)
 gaugino mass parameter $M_1$. Mostly the SU(2) gaugino mass parameter $M_2$
   is assumed to be connected with $M_1$ via s standard GUT relation which
 depends on the unification of the gaugino masses $M_1$, $M_2$ and $M_3$ at
 the GUT-scale. Other supersymmetric models, however, prefer other relations
   between $M_1$, $M_2$ and $M_3$ at the GUT scale and at the weak scale.
    Therefore it is necessary to determine $M_1$ at a LC to test the GUT
   relation between $M_1$ and $M_2$. The LC will - hopefully - run in four
     modes: For the LC four modes are in discussion: $e^-e^+$, $e^-e^-$,
$e\gamma$ and $\gamma\gamma$. For each mode I will present a special process
 and discuss its use to determine $M_1$. The talk will end with a comparison
                        of the four modes of the LC.

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