Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How light a higgsino or a wino dark matter can become in a compressed
  scenario of MSSM   Higgsinos and Wino have strong motivations for being Dark Matter (DM)
candidates in supersymmetry, but their annihilation cross sections are quite
large. For thermal generation and a single component DM setup the higgsinos or
wino may have masses of around 1 or 2-3 TeV respectively. For such DM
candidates, a small amount of slepton coannihilation may decrease the effective
DM annihilation cross section. This, in turn reduces the lower limit of the
relic density satisfied DM mass by more than 50%. Almost a similar degree of
reduction of the same limit is also seen for squark coannihilations. However,
on the contrary, for near degeneracy of squarks and higgsino DM, near its
generic upper limit, the associated coannihilations may decrease the relic
density, thus extending the upper limit towards higher DM masses. We also
compute the direct and indirect detection signals. Here, because of the
quasi-mass degeneracy of the squarks and the LSP, we come across a situation
where squark exchange diagrams may contribute significantly or more strongly
than the Higgs exchange contributions in the spin-independent direct detection
cross section of DM. For the higgsino-DM scenario, we observe that a DM mass of
600 GeV to be consistent with WMAP/PLANCK and LUX data for sfermion
coannihilations. The LUX data itself excludes the region of 450 to 600 GeV, by
a half order of magnitude of the cross-section, well below the associated
uncertainty. The similar combined lower limit for a wino DM is about 1.1 TeV.
There is hardly any collider bound from the LHC for squarks and sleptons in
such a compressed scenario where sfermion masses are close to the mass of a
higgsino/wino LSP.

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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph