A Maximum Likelihood Analysis of Low-Energy CDMS Data - INSPIRE

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A Maximum Likelihood Analysis of Low-Energy CDMS Data

J.I. Collar
(
- Chicago U. and
- Chicago U., EFI and
- Chicago U., KICP
)
,
N.E. Fields
(
- Chicago U. and
- Chicago U., EFI and
- Chicago U., KICP
)

Apr, 2012

5 pages

e-Print:

1204.3559 [astro-ph.CO]

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Abstract: (arXiv)

An unbinned maximum likelihood analysis of CDMS low-energy data reveals a strong preference (5.7 sigma C.L.) for a model containing an exponential excess of events in the nuclear recoil band, when compared to the null hypothesis. We comment on the possible origin of such an excess, establishing a comparison with anomalies in other dark matter experiments. A recent annual modulation search in CDMS data is shown to be insufficiently sensitive to test a dark matter origin for this excess.

Note:

5 pages, 4 figures v2: minor additions only v3: expanded discussion on surface events (pg. 3)

14.80.Mz
95.55.Vj
85.30.-z
95.35.+d
nucleus: recoil
flux: time dependence
CDMS
dark matter
data analysis method
statistical analysis

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Figures(4)

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