Speaker
Piotr Zalewski
(Division of High Energy Physics)
Description
Within Gauge-Mediated Supersymmetry Breaking (GMSB) models gravitino is the Lightest
Supersymmetry Partner (LSP) whereas neutralino or slepton plays the role of the Next
to Lightest Supersymmetry Partner (NLSP). NLSP decays to its Standard Model partner
and gravitino with a lifetime depending on the scale of the SUSY breaking. Detection
of the NLSP and determination of its properties, in particular lifetime can be of
crucial importance for the physics program at LHC. We concentrate on two scenarios
specific from the detection point of view. In the first, neutralino decaying in
flight is the NLSP. We use not-pointing to the interaction point photons identified
by the CMS electromagnetic calorimeter as the signature of decaying in flight
neutralinos. We show that it is possible to estimate the ctau of neutralinos for a
range from centimeters to meters with a precision of the order of 20%, if
the number of produced signal events is not less than about 5000. In the second case
a long-lived stau is the NLSP. We show that CMS muon system is able to detect it as a
particle traveling with velocity lower than the speed of light, and determine its mass.
Primary author
Piotr Zalewski
(Division of High Energy Physics)
Co-authors
ATLAS Collaboration
CMS Collaboration
