Charginos and neutralinos in the light of radiative corrections: Sealing the fate of Higgsino dark matter

John Ellis, Toby Falk, Gerardo Ganis, Keith A. Olive, Michael Schmitt, Michael Schmitt

Research output: Contribution to journalArticle

129 Scopus citations

Abstract

We analyze the CERN LEP constraints from searches for charginos (Formula presented) and neutralinos (Formula presented) taking into account radiative corrections to the relations between their masses and the underlying Higgs-mixing and gaugino-mass parameters μ, (Formula presented) and the trilinear mass parameter (Formula presented) While radiative corrections do not alter the excluded domain in (Formula presented) as a function of (Formula presented) its mapping into the μ, (Formula presented) plane is altered. We update our previous lower limits on the mass of gaugino dark matter and on (Formula presented) the ratio of Higgs vacuum expectation values, in light of the latest LEP data and these radiative corrections. We also discuss the viability of Higgsino dark matter, incorporating coannihilation effects into the calculation of the Higgsino relic abundance. We find that Higgsino dark matter is viable for only a very limited range of μ and (Formula presented) which will be explored completely by upcoming LEP runs.

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume58
Issue number9
DOIs
StatePublished - Sep 18 1998

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