@article{1d9f9348de754f4093be42387c38e499,
title = "Search for solar Kaluza-Klein axions by annual modulation with the XMASS-I detector",
abstract = " In theories with large extra dimensions beyond the standard 4-dimensional spacetime, axions could propagate in such extra dimensions, and acquire Kaluza-Klein (KK) excitations. These KK axions are produced in the Sun and could solve the unexplained heating of the solar corona. While most of the solar KK axions escape from the solar system, a small fraction are gravitationally trapped in orbits around the Sun. They would decay into 2 photons inside a terrestrial detector. The event rate is expected to modulate annually depending on the distance from the Sun. We have searched for the annual modulation signature using 832 × 359 kg·days of XMASS-I data. No significant event rate modulation is found, and hence we set the first experimental constraint on the KK axion-photon coupling of 4.8 × 10 −12 GeV −1 at the 90% confidence level for a KK axion number density of n¯ a = 4.07 × 10 13 m −3 , the total number of extra dimensions n = 2, and the number of extra dimensions δ = 2 that axions can propagate in.",
author = "{XMASS Collaboration} and N. Oka 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 T. Norita and H. Ogawa and K. Sato and H. Sekiya and O. Takachio 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 R. Kegasa and K. Masuda and H. Takiya and K. Fushimi and G. Kanzaki and K. Martens and Y. Suzuki and Xu, {B. D.} and R. Fujita and K. Hosokawa and K. Miuchi 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 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, Grant-in-Aid for Scientific Research (26104004, 26104005, 26104007), and N. Oka thanks Grant-in-Aid for a JSPS Research Fellowship. This work was also supported partially by the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2011-220-C00006). Publisher Copyright: {\textcopyright} The Author(s) 2017. Published by Oxford University Press on behalf of the Physical Society of Japan.",
year = "2017",
month = oct,
doi = "10.1093/ptep/ptx137",
language = "English",
volume = "2017",
journal = "Progress of Theoretical and Experimental Physics",
issn = "2050-3911",
publisher = "Oxford University Press",
number = "10",
}