Phys.Lett. B 833, 137355 (2022)

K.Abe, K.Hiraide, K.Ichimura, N.Kato, Y.Kishimoto, K.Kobayashi, M.Kobayashi, S.Moriyama, M.Nakahata, K.Sato, H.Sekiya, T.Suzuki, A.Takeda, S.Tasaka, M.Yamashita, B.S.Yang, N.Y.Kim, Y.D.Kim, Y.H.Kim, R.Ishii, Y.Itow, K.Kanzawa, K.Masuda, K.Martens, A.Mason, Y.Suzuki, K.Miuchi, Y.Takeuchi, K.B.Lee, M.K.Lee, Y.Fukuda, H.Ogawa, K.Nishijima, K.Fushimi, B.D.Xu, S.Nakamura, for the XMASS Collaboration

Search for neutrinoless quadruple beta decay of ¹³⁶Xe in XMASS-I

RADIOACTIVITY ¹³⁶Xe(4β^-); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced T_1/2 lower limit. The liquid-xenon detector XMASS-I.

doi: 10.1016/j.physletb.2022.137355