{"paper":{"title":"Photon-Veto Counters at the Outer Edge of the Endcap Calorimeter for the KOTO Experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"E. Iwai, G.Y. Lim, H. Nanjo, H. Watanabe, H. Yokota, J.Ma, J.W. Lee, K. Shiomi, M. Togawa, S. Suzuki, T.K. Komatsubara, T. Masuda, T. Matsumura, T. Nomura, T. Shinkawa, T. Yamanaka, Y.D. Ri, Y. Odani, Y. Sugiyama, Y. Wah","submitted_at":"2014-09-30T02:39:56Z","abstract_excerpt":"The Outer-Edge Veto (OEV) counter subsystem for extra-photon detection from the backgrounds for the? $K^0_L\\rightarrow\\pi^0\\nu\\bar{\\nu}$ decay is located at the outer edge of the endcap CsI calorimeter of the KOTO experiment at J-PARC. The subsystem is composed of 44 counters with different cross-sectional shapes. All counters are made of lead and scintillator plates and read out through wavelength-shifting fibers. In this paper, we discuss the design and performances of the OEV counters under heavy load ($\\sim8$ tons/m$^2$) in vacuum. For 1-MeV energy deposit, the average light yield and time"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.8367","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}