Charginos and Neutralinos in the Light of Radiative Corrections: Sealing the Fate of Higgsino Dark Matter

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dc.creatorEllis, John
dc.creatorFalk, Toby
dc.creatorGanis, Gerardo
dc.creatorOlive, Keith A.
dc.creatorSchmitt, Michael
dc.date1998-01-29
dc.date1998-09-22
dc.date.accessioned2026-07-07T10:33:36Z
dc.date.available2026-07-07T10:33:36Z
dc.descriptionWe analyze the LEP constraints from searches for charginos $χ^{\pm}$ and neutralinos $χ_i$, taking into account radiative corrections to the relations between their masses and the underlying Higgs-mixing and gaugino-mass parameters $μ, m_{1/2}$ and the trilinear mass parameter $A_t$. Whilst radiative corrections do not alter the excluded domain in $m_{χ^{\pm}}$ as a function of $m_{χ^{\pm}} - m_χ$, its mapping into the $μ, m_{1/2}$ plane is altered. We update our previous lower limits on the mass of gaugino dark matter and on tan$β$, the ratio of Higgs vacuum expectation values, in the light of the latest LEP data and these radiative corrections. We also discuss the viability of Higgsino dark matter, incorporating co-annihilation 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 $m_{1/2}$, which will be explored completely by upcoming LEP runs.
dc.descriptionVersion to appear in Phys. Rev. D., 21 pages in LateX, including 10 encapsulated postscript figures; uses epsf.sty.; Figures modified (one deleted), conclusions unchanged
dc.identifierhttps://arxiv.org/abs/hep-ph/9801445
dc.identifierhttp://arxiv.org/abs/hep-ph/9801445
dc.identifierPhys.Rev.D58:095002,1998
dc.identifierdoi:10.1103/PhysRevD.58.095002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179173
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleCharginos and Neutralinos in the Light of Radiative Corrections: Sealing the Fate of Higgsino Dark Matter
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