Green, Anne M. and Morgan, Ben. (2008) Consequences of statistical sense determination for WIMP directional detection. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.77 (No.2). ISSN 1550-7998

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Abstract

We study the consequences of limited recoil sense reconstruction on the number of events required to reject isotropy and detect a WIMP signal using a directional detector. For a constant probability of determining the sense correctly, 3-d readout and zero background, we find that as the probability is decreased from 1.0 to 0.75 the number of events required increases by a factor of a few. As the probability is decreased further the number of events increases sharply, and isotropy can be rejected more easily by discarding the sense information and using axial statistics. This however requires an order of magnitude more events than vectorial data with perfect sense determination. We also consider energy dependent probabilities of correctly measuring the sense. Our main finding is that correctly determining the sense of the abundant, but less anisotropic, low energy recoils is most important.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Particles (Nuclear physics), Astrophysics, Nuclear counters, Particle tracks (Nuclear physics)
Journal or Publication Title:	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher:	American Physical Society
ISSN:	1550-7998
Date:	January 2008
Volume:	Vol.77
Number:	No.2
Number of Pages:	4
Identification Number:	10.1103/PhysRevD.77.027303
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Science and Technology Facilities Council (Great Britain) (STFC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/30608

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