Description
Chairperson: Werner POROD
Mr
Tuomas Honkavaara
(Helsinki Institute of Physics)
30/07/2007, 14:00
Colliders - Susy Phenomenology
Parallel Talk
Sneutrino-antisneutrino mixing occurs in a supersymmetric model
where neutrinos have nonzero Majorana masses. This can lead
to the sneutrino decaying into a final state with a ``wrong-sign
charged lepton''. In an $e^- \gamma$ collider, the signal of the
associated production of an electron-sneutrino and the lighter chargino
and the subsequent decays can be $e^- \gamma \rightarrow...
Dr
Thomas Kernreiter
(University of Vienna)
30/07/2007, 14:20
Colliders - Susy Phenomenology
Parallel Talk
We study the effects of lepton flavour violation (LFV)
on the production processes $e^+e^-\to\tilde\chi^+_i\tilde\chi^-_j$
at a linear collider with longitudinal $e^+$ and $e^-$ beam polarizations.
In the case of LFV the sneutrino mass eigenstates have
no definite flavour, therefore, in the $t-$channel more than one sneutrino
mass eigenstate can contribute to the chargino production...
Prof.
Keisho Hidaka
(Tokyo Gakugei University)
30/07/2007, 14:40
Colliders - Susy Phenomenology
Parallel Talk
We perform systematic study of decays of sneutrinos including bosonic
decays such as decays into slepton + (W^+ or H^+) as well as fermionic
ones in the Minimal Supersymmetric Standard Model (MSSM) with slepton
generation mixings and real parameters. We show that the effect of the
slepton generation mixings on the branching ratios of the sneutrino
decays (both fermionic and bosonic...
Mr
Sebastian Grab
(Physikalisches Institut Bonn)
30/07/2007, 15:00
Colliders - Susy Phenomenology
Parallel Talk
We consider the case where supersymmetry with broken R-parity is embedded in the
minimal supergravity model (mSUGRA). This alters the standard mSUGRA spectrum and
opens a wide range in parameter space, where the scalar tau is the lightest
supersymmetric particle, instead of the lightest neutralino. We study the resulting
LHC phenomenology. Promising signatures would be detached vertices...
Dr
Alexey Gladyshev
(Joint Institute for Nuclear Research)
30/07/2007, 15:20
Colliders - Susy Phenomenology
Parallel Talk
Specific regions in the MSSM parameter space are analysed. It is shown that in
the narrow band near the co-annihilation region charged sleptons (staus) may
be long-lived particles. This region is consistent with the WMAP restrictions on
the Dark matter and depends on the value of \tan\beta. Due to a relatively
small mass stau production cross-section at LHC may reach a few % pb. In the...
Dr
Masahiro Ibe
(Stanford Linear Accelerator center)
30/07/2007, 15:40
Colliders - Susy Phenomenology
Parallel Talk
We explain that there is a sweet spot in between the gauge and gravity
mediated supersymmetry breaking scenario where the theory is perfectly
consistent with various requirements.
At the sweet spot, all the classic problems, such as the supersymmetric
flavor/CP problem and the mu-problem are solved.
The observed dark matter can be explained by the gravitino (with mass
O(1) GeV)...
