Neutralino relic density from ILC measurements in the CP-violating MSSM

Journal Article · Tue Jul 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.015011· OSTI ID:21250265

Belanger, G ^[1]; Kittel, O ^[2]; Kraml, S ^[3]; Martyn, H -U ^[4]; Pukhov, A ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique Theorique LAPTH, CNRS, Univ. de Savoie, B.P. 110, F-74941 Annecy-le-Vieux Cedex (France)
2. Physikalisches Institut der Universitaet Bonn, Nussallee 12, D-53115 Bonn (Germany)
3. Laboratoire de Physique Subatomique et de Cosmologie, UJF, CNRS/IN2P3, INPG, 53 Avenue des Martyrs, F-38026 Grenoble (France)
4. I. Physikalisches Institut, RWTH Aachen, Sommerfeldstrasse 14, D-52074 Aachen (Germany)
5. Skobeltsyn Inst. of Nuclear Physics, Moscow State Univ., Moscow 119992 (Russian Federation)

We discuss ILC measurements for a specific MSSM scenario with CP phases, where the lightest neutralino is a good candidate for dark matter, annihilating efficiently through t-channel exchange of light staus. These prospective (CP-even) ILC measurements are then used to fit the underlying model parameters. A collider prediction of the relic density of the neutralino from this fit gives 0.116<{omega}h{sup 2}<0.19 at 95% C.L. CP-odd observables, while being a direct signal of CP violation, do not help in further constraining {omega}h{sup 2}. The interplay with (in)direct detection of dark matter and with measurements of electric dipole moments is also discussed. Finally we comment on collider measurements at higher energies for refining the prediction of {omega}h{sup 2}.

• OSTI ID: 21250265
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CP INVARIANCE
DENSITY
DETECTION
ELECTRIC DIPOLE MOMENTS
FORECASTING
LINEAR COLLIDERS
NONLUMINOUS MATTER
STANDARD MODEL
SUPERSYMMETRY
T CHANNEL