Dark matter constraints from a joint analysis of dwarf Spheroidal galaxy observations with VERITAS

(The VERITAS Collaboration)

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We present constraints on the annihilation cross section of weakly interacting massive particles dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS. These results are derived from an optimized photon weighting statistical technique that improves on standard imaging atmospheric Cherenkov telescope (IACT) analyses by utilizing the spectral and spatial properties of individual photon events. We report on the results of ∼230 hours of observations of five dwarf galaxies and the joint statistical analysis of four of the dwarf galaxies. We find no evidence of gamma-ray emission from any individual dwarf nor in the joint analysis. The derived upper limit on the dark matter annihilation cross section from the joint analysis is 1.35×10-23 cm3 s-1 at 1 TeV for the bottom quark (bb) final state, 2.85×10-24 cm3 s-1 at 1 TeV for the tau lepton (τ+τ-) final state and 1.32×10-25 cm3 s-1 at 1 TeV for the gauge boson (γγ) final state.

Original languageEnglish (US)
Article number082001
JournalPhysical Review D
Volume95
Issue number8
DOIs
StatePublished - Apr 5 2017

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dwarf galaxies
dark matter
statistical analysis
weakly interacting massive particles
cross sections
photons
leptons
bosons
gamma rays
telescopes
quarks

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Dark matter constraints from a joint analysis of dwarf Spheroidal galaxy observations with VERITAS. / (The VERITAS Collaboration).

In: Physical Review D, Vol. 95, No. 8, 082001, 05.04.2017.

Research output: Contribution to journalArticle

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abstract = "We present constraints on the annihilation cross section of weakly interacting massive particles dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS. These results are derived from an optimized photon weighting statistical technique that improves on standard imaging atmospheric Cherenkov telescope (IACT) analyses by utilizing the spectral and spatial properties of individual photon events. We report on the results of ∼230 hours of observations of five dwarf galaxies and the joint statistical analysis of four of the dwarf galaxies. We find no evidence of gamma-ray emission from any individual dwarf nor in the joint analysis. The derived upper limit on the dark matter annihilation cross section from the joint analysis is 1.35×10-23 cm3 s-1 at 1 TeV for the bottom quark (bb) final state, 2.85×10-24 cm3 s-1 at 1 TeV for the tau lepton (τ+τ-) final state and 1.32×10-25 cm3 s-1 at 1 TeV for the gauge boson (γγ) final state.",
author = "{(The VERITAS Collaboration)} and S. Archambault and A. Archer and W. Benbow and R. Bird and E. Bourbeau and T. Brantseg and M. Buchovecky and Buckley, {J. H.} and V. Bugaev and K. Byrum and M. Cerruti and Christiansen, {J. L.} and Connolly, {M. P.} and W. Cui and Daniel, {M. K.} and Q. Feng and Finley, {J. P.} and H. Fleischhack and L. Fortson and A. Furniss and A. Geringer-Sameth and S. Griffin and J. Grube and M. H{\"u}tten and N. H{\aa}kansson and D. Hanna and O. Hervet and J. Holder and G. Hughes and B. Hummensky and Johnson, {C. A.} and P. Kaaret and P. Kar and N. Kelley-Hoskins and M. Kertzman and D. Kieda and S. Koushiappas and M. Krause and F. Krennrich and Lang, {M. J.} and Lin, {T. T.Y.} and S. McArthur and P. Moriarty and R. Mukherjee and D. Nieto and S. O'Brien and Ong, {R. A.} and Otte, {A. N.} and N. Park and A. Popkow",
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AU - Bourbeau, E.

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AU - Fortson, L.

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AU - Geringer-Sameth, A.

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AU - Hummensky, B.

AU - Johnson, C. A.

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AU - Kertzman, M.

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AU - Koushiappas, S.

AU - Krause, M.

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AU - McArthur, S.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - Nieto, D.

AU - O'Brien, S.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Park, N.

AU - Popkow, A.

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N2 - We present constraints on the annihilation cross section of weakly interacting massive particles dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS. These results are derived from an optimized photon weighting statistical technique that improves on standard imaging atmospheric Cherenkov telescope (IACT) analyses by utilizing the spectral and spatial properties of individual photon events. We report on the results of ∼230 hours of observations of five dwarf galaxies and the joint statistical analysis of four of the dwarf galaxies. We find no evidence of gamma-ray emission from any individual dwarf nor in the joint analysis. The derived upper limit on the dark matter annihilation cross section from the joint analysis is 1.35×10-23 cm3 s-1 at 1 TeV for the bottom quark (bb) final state, 2.85×10-24 cm3 s-1 at 1 TeV for the tau lepton (τ+τ-) final state and 1.32×10-25 cm3 s-1 at 1 TeV for the gauge boson (γγ) final state.

AB - We present constraints on the annihilation cross section of weakly interacting massive particles dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS. These results are derived from an optimized photon weighting statistical technique that improves on standard imaging atmospheric Cherenkov telescope (IACT) analyses by utilizing the spectral and spatial properties of individual photon events. We report on the results of ∼230 hours of observations of five dwarf galaxies and the joint statistical analysis of four of the dwarf galaxies. We find no evidence of gamma-ray emission from any individual dwarf nor in the joint analysis. The derived upper limit on the dark matter annihilation cross section from the joint analysis is 1.35×10-23 cm3 s-1 at 1 TeV for the bottom quark (bb) final state, 2.85×10-24 cm3 s-1 at 1 TeV for the tau lepton (τ+τ-) final state and 1.32×10-25 cm3 s-1 at 1 TeV for the gauge boson (γγ) final state.

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