Search for inelastic WIMP-iodine scattering with COSINE-100

Search for inelastic WIMP-iodine scattering with COSINE-100

We report the results of a search for inelastic scattering of weakly interacting massive particles (WIMPs) off I127 nuclei using NaI(Tl) crystals with a data exposure of 97.7 kg·years from the COSINE-100 experiment. The signature of inelastic WIMP-I127 scattering is a nuclear recoil accompanied by a...

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Hauptverfasser: Adhikari, G, Carlin, N, Cho, J.Y, Choi, J.J, Choi, S, Ezeribe, A.C, França, L.E, Ha, C, Hahn, I.S, Hollick, S.J, Jeon, E.J, Joo, H.W, Kang, W.G, Kauer, M, Kim, B.H, Kim, H.J, Kim, J, Kim, K.W, Kim, S.H, Kim, S.K, Kim, S.W, Kim, W.K, Kim, Y.D, Kim, Y.H, Ko, Y.J, Lee, D.H, Lee, E.K, Lee, H, Lee, H.S, Lee, H.Y, Lee, I.S, Lee, J, Lee, J.Y, Lee, M.H, Lee, S.H, Lee, S.M, Lee, Y.J, Leonard, D.S, Luan, N.T, Manzato, B.B, Maruyama, R.H, Neal, R.J, Nikkel, J.A, Olsen, S.L, Park, B.J, Park, H.K, Park, H.S, Park, J.C, Park, K.S, Park, S.D, Pitta, R.L.C, Prihtiadi, H, Ra, S.J, Rott, C, Shin, K.A, Cavalcante, D.F.F.S, Scarff, A, Son, M.K, Spooner, N.J.C, Truc, L.T, Yang, L, Yu, G.H
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Sprache:eng
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Zusammenfassung:We report the results of a search for inelastic scattering of weakly interacting massive particles (WIMPs) off I127 nuclei using NaI(Tl) crystals with a data exposure of 97.7 kg·years from the COSINE-100 experiment. The signature of inelastic WIMP-I127 scattering is a nuclear recoil accompanied by a 57.6 keV γ-ray from the prompt deexcitation, producing a more energetic signal compared to the typical WIMP nuclear recoil signal. We found no evidence for this inelastic scattering signature and set a 90% confidence level upper limit on the WIMP-proton spin-dependent, inelastic scattering cross section of 1.2×10-37 cm2 at the WIMP mass 500 GeV/c2.
DOI:10.1103/physrevd.108.092006