Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lower Bound on the Neutralino Mass from New Data on CMB and Implications
  for Relic Neutralinos   In the frame of an effective MSSM model without gaugino-mass unification at a
grand unification (GUT) scale, we set a lower bound on the neutralino mass
based on the new WMAP data on $\Omega_{CDM}$. Our lower bound, $m_{\chi} \gsim
6$ GeV, leaves much room for relic neutralinos significantly lighter than those
commonly considered ($m_{\chi} \gsim 50$ GeV). We prove that these light
neutralinos may produce measurable effects in WIMP direct detection experiments
of low energy threshold and large exposure.

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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat