The role of beam polarization for radiative neutralino production at the ILC

We analyze the impact of electron and positron beam polarization on radiative neutralino production at the international linear collider (ILC). We focus on three different mSUGRA scenarios in turn at the Higgs strahlung threshold, the top pair production threshold, and at 500 GeV. In these scenarios...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2008-03, Vol.54 (2), p.277-284
Main Authors: Dreiner, H.K., Kittel, O., Langenfeld, U.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Background radiation
Electron beams
Elementary Particles
Fermions
Hadrons
Heavy Ions
Impact analysis
Measurement Science and Instrumentation
Neutrinos
Nuclear Energy
Nuclear Physics
Pair production
Physics
Physics and Astronomy
Polarization
Positron beams
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
String Theory
Superconducting supercolliders
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Summary:We analyze the impact of electron and positron beam polarization on radiative neutralino production at the international linear collider (ILC). We focus on three different mSUGRA scenarios in turn at the Higgs strahlung threshold, the top pair production threshold, and at 500 GeV. In these scenarios at the corresponding , radiative neutralino production is the only supersymmetric production mechanism that is kinematically allowed. The heavier neutralinos and charginos as well as the sleptons, squarks and gluinos are too heavy to be pair produced. We calculate the signal cross section and also the standard model background from radiative neutrino production. For our scenarios, we obtain significances larger than 10 and signal to background ratios between 2% and 5%, if we have electron beam polarization –0.8 and positron beam polarization –0.3. If we have electron beam polarization of , then the signal is observable with but both the significance and the signal to background ratio are significantly improved for .
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-007-0520-3