K. Kirch^1,3, V. Kletzl^1,3,†, J. Krempel¹, B. Lauss^3,‡, D. Pais^1,3, I. Rienäcker³, D. Ries³, D. Rozpędzik⁴, P. Schmidt-Wellenburg³, K. S. Tanaka^3,§, J. Zejma⁴, N. Ziehl^1,∥, and G. Zsigmond^3,¶

• ¹Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zürich, Switzerland
• ²INFN, Laboratori Nazionali del Gran Sasso, Assergi, 67100 L’Aquila, Italy
• ³Laboratory for Particle Physics, PSI Center for Neutron and Muon Sciences, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
• ⁴Marian Smoluchowski Institute of Physics, Jagiellonian University, 30-348 Cracow, Poland

• ^*Present address: Department of Physics, National Taiwan University, 106319 Taipei, Taiwan.
• ^†Present address: Marietta-Blau-Institute for Particle Physics, Austrian Academy of Sciences, 1010 Vienna, Austria.
• ^‡Contact author: bernhard.lauss@psi.ch
• ^§Present address: Waseda University, 3-4-1 Ookubo, Shinjuku-ku, Tokyo 169-8555, Japan.
• ^∥Contact author: ziehln@phys.ethz.ch
• ^¶Contact author: geza.zsigmond@psi.ch