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Comparison between DAMA/LIBRA and COSINE-100 in the light of Quenching Factors | | Y. J. Ko
; K. W. Kim
; G. Adhikari
; P. Adhikari
; E. Barbosa de Souza
; N. Carlin
; J. J. Choi
; S. Choi
; M. Djamal
; A. C. Ezeribe
; C. Ha
; I. S. Hahn
; E. J. Jeon
; J. H. Jo
; W. G. Kang
; M. Kauer
; G. S. Kim
; H. Kim
; H. J. Kim
; N. Y. Kim
; S. K. Kim
; Y. D. Kim
; Y. H. Kim
; E. K. Lee
; H. S. Lee
; J. Lee
; J. Y. Lee
; M. H. Lee
; S. H. Lee
; D. S. Leonard
; W. A. Lynch
; B. B. Manzato
; R. H. Maruyama
; R. J. Neal
; S. L. Olsen
; B. J. Park
; H. K. Park
; H. S. Park
; K. S. Park
; R. L. C. Pitta
; H. Prihtiadi
; S. J. Ra
; C. Rott
; K. A. Shin
; A. Scarff
; N. J. C. Spooner
; W. G. Thompson
; L. Yang
; G. H. Yu
; | | Date: |
11 Jul 2019 | | Abstract: | There is a long standing debate about whether or not the annual modulation
signal reported by the DAMA/LIBRA collaboration is induced by Weakly
Interacting Massive Particles (WIMP) in the galaxy’s dark matter halo
scattering from nuclides in their NaI(Tl) crystal target/detector. This is
because regions of WIMP-mass vs. WIMP-nucleon cross-section parameter space
that can accommodate the DAMA/LIBRA-phase1 modulation signal in the context of
the standard WIMP dark matter galactic halo and isospin-conserving (canonical),
spin-independent (SI) WIMP-nucleon interactions have been excluded by the
COSINE-100 experiment that uses the same NaI(Tl) target/detector material.
Moreover, the recently released DAMA/LIBRA-phase2 results are inconsistent with
an interpretation as WIMP-nuclide scattering via the canonical SI interaction
and prefer, instead, isospin-violating or spin-dependent interactions. Dark
matter interpretations of the DAMA/LIBRA signal are sensitive to the NaI(Tl)
scintillation efficiency for nuclear recoils, which is characterized by
so-called quenching factors (QF), and the QF values used in previous studies
differ significantly from recently reported measurements, which may have led to
incorrect characterizations of the DAMA/LIBRA signal. In this article, the
compatibility of the DAMA/LIBRA and COSINE-100 results, in light of the new QF
measurements is examined for different possible types of WIMP-nucleon
interactions. The resulting allowed parameter space regions associated with the
DAMA/LIBRA signal are explicitly compared with 90\% confidence level upper
limits from the initial 59.5 day COSINE-100 exposure. With the newly measured
QF values, the allowed 3$sigma$ regions from the DAMA/LIBRA data are still
generally excluded by the COSINE-100 data. | | Source: | arXiv, 1907.4963 | | Services: | Forum | Review | PDF | Favorites | |
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