@article{994b5bc9bea3428589e52ca82af68ddc,
title = " Search for WIMP- 129 Xe inelastic scattering with particle identification in XMASS-I ",
abstract = " A search for Weakly Interacting Massive Particles (WIMPs) was conducted with the single-phase liquid-xenon detector XMASS through inelastic scattering in which 129 Xe nuclei were excited, using an exposure (327 kg × 800.0 days) 48 times larger than that of our previous study. The inelastic excitation sensitivity was improved by detailed evaluation of background, event classification based on scintillation timing that distinguished γ-rays and β-rays, and simultaneous fitting of the energy spectra of γ-like and β-like samples. No evidence of a WIMP signal was found. Thus, we set the upper limits of the inelastic channel cross section at 90% confidence level, for example, 4.1×10 −39 cm 2 for a 200 GeV/c 2 WIMP. This result provides the most stringent limits on the SD WIMP-neutron interaction and is better by a factor of 7.7 at 200 GeV/c 2 than the existing experimental limit.",
keywords = "Dark matter, Inelastic scattering, Liquid xenon, Low background, Spin-dependent interaction",
author = "{XMASS Collaboration} and T. Suzuki and K. Abe and K. Hiraide and K. Ichimura and Y. Kishimoto and K. Kobayashi and M. Kobayashi and S. Moriyama and M. Nakahata and H. Ogawa and K. Sato and H. Sekiya and A. Takeda and S. Tasaka and M. Yamashita and Yang, {B. S.} and Kim, {N. Y.} and Kim, {Y. D.} and Y. Itow and K. Kanzawa and K. Masuda and K. Martens and Y. Suzuki and Xu, {B. D.} and K. Miuchi and N. Oka and Y. Takeuchi and Kim, {Y. H.} and Lee, {K. B.} and Lee, {M. K.} and Y. Fukuda and M. Miyasaka and K. Nishijima and K. Fushimi and G. Kanzaki and S. Nakamura",
note = "Funding Information: We gratefully acknowledge the cooperation of Kamioka Mining and Smelting Company. This work was supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology, the joint research program of the Institute for Cosmic Ray Research (ICRR), the University of Tokyo , Grant-in-Aid for Scientific Research, JSPS KAKENHI Grant Number, 19GS0204 , 26104004 , partially by the National Research Foundation of Korea Grant funded by the Korean Government ( NRF-2011-220-C00006 ), and Institute for Basic Science ( IBS-R017-G1-2018-a00 ). Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",
year = "2019",
month = jul,
doi = "10.1016/j.astropartphys.2019.02.007",
language = "English",
volume = "110",
pages = "1--7",
journal = "Astroparticle Physics",
issn = "0927-6505",
publisher = "Elsevier",
}