COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models

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dc.contributor University of Helsinki, Department of Physics en COSINE-100 Collaboration Sogang Phenomenology Grp Adhikari, G. Yoon, Jong-Hyun 2019-09-03T05:36:01Z 2019-09-03T05:36:01Z 2019-06
dc.identifier.citation COSINE-100 Collaboration , Sogang Phenomenology Grp , Adhikari , G & Yoon , J-H 2019 , ' COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models ' , Journal of Cosmology and Astroparticle Physics , no. 6 , 048 . en
dc.identifier.issn 1475-7516
dc.identifier.other PURE: 126153492
dc.identifier.other PURE UUID: 03b3d5db-2152-4c67-90c6-d8b9a0ca56e3
dc.identifier.other WOS: 000472954100001
dc.description.abstract Assuming a standard Maxwellian for the WIMP velocity distribution, we obtain the bounds from null WIMP search results of 59.5 days of COSINE-100 data on the DAMA/LIBRA-phase2 modulation effect within the context of the non-relativistic effective theory of WIMP-nucleus scattering. Here, we systematically assume that one of the effective operators allowed by Galilean invariance dominates in the effective Hamiltonian of a spin-1/2 dark matter (DM) particle. We find that, although DAMA/LIBRA and COSINE-100 use the same sodium-iodide target, the comparison of the two results still depends on the particle-physics model. This is mainly due to two reasons: i) the WIMP signal spectral shape; ii) the expected modulation fractions, when the upper bound on the time-averaged rate in COSINE-100 is converted into a constraint on the annual modulation component in DAMA/LIBRA. We find that the latter effect is the dominant one. For several effective operators the expected modulation fractions are larger than in the standard spin-independent or spin-dependent interaction cases. As a consequence, compatibility between the modulation effect observed in DAMA/LIBRA and the null result from COSINE-100 is still possible for several non-relativistic operators. At low WIMP masses such relatively high values of the modulation fractions arise because COSINE-100 is mainly sensitive to WIMP-sodium scattering events, due to the higher threshold compared to DAMA/LIBRA. A next COSINE analysis is expected to have a full sensitivity for the 5 a region of DAMA/LIBRA. en
dc.format.extent 22
dc.language.iso eng
dc.relation.ispartof Journal of Cosmology and Astroparticle Physics
dc.rights en
dc.subject dark matter experiments en
dc.subject dark matter theory en
dc.subject MODULATION en
dc.subject 115 Astronomy, Space science en
dc.title COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models en
dc.type Article
dc.description.version Peer reviewed
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion

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