Search for a heavy neutral lepton that mixes predominantly with the tau neutrino
-
Published:2024-06-11
Issue:11
Volume:109
Page:
-
ISSN:2470-0010
-
Container-title:Physical Review D
-
language:en
-
Short-container-title:Phys. Rev. D
Author:
Nayak M.ORCID, Dey S.ORCID, Soffer A.ORCID, Adachi I.ORCID, Aihara H.ORCID, Al Said S.ORCID, Asner D. M.ORCID, Atmacan H.ORCID, Ayad R.ORCID, Babu V.ORCID, Banerjee Sw.ORCID, Bauer M.ORCID, Behera P.ORCID, Belous K.ORCID, Bessner M.ORCID, Bhardwaj V.ORCID, Bhuyan B.ORCID, Bilka T.ORCID, Biswas D.ORCID, Bobrov A.ORCID, Bodrov D.ORCID, Bračko M.ORCID, Branchini P.ORCID, Browder T. E.ORCID, Budano A.ORCID, Campajola M.ORCID, Červenkov D.ORCID, Chang M.-C.ORCID, Cheon B. G.ORCID, Cho H. E.ORCID, Cho K.ORCID, Choi Y.ORCID, Choudhury S.ORCID, Das S.ORCID, De Nardo G.ORCID, De Pietro G.ORCID, Dhamija R.ORCID, Di Capua F.ORCID, Dingfelder J.ORCID, Doležal Z.ORCID, Dong T. V.ORCID, Dubey S.ORCID, Ecker P.ORCID, Epifanov D.ORCID, Ferber T.ORCID, Fogel O.ORCID, Fulsom B. G.ORCID, Gaur V.ORCID, Giri A.ORCID, Goldenzweig P.ORCID, Graziani E.ORCID, Gudkova K.ORCID, Hadjivasiliou C.ORCID, Halder S.ORCID, Hara T.ORCID, Hayasaka K.ORCID, Hayashii H.ORCID, Hazra S.ORCID, Hedges M. T.ORCID, Herrmann D.ORCID, Hou W.-S.ORCID, Hsu C.-L.ORCID, Inami K.ORCID, Ishikawa A.ORCID, Itoh R.ORCID, Iwasaki M.ORCID, Jacobs W. W.ORCID, Jia S.ORCID, Jin Y.ORCID, Kawasaki T.ORCID, Kiesling C.ORCID, Kim C. H.ORCID, Kim D. Y.ORCID, Kinoshita K.ORCID, Kodyš P.ORCID, Korobov A.ORCID, Korpar S.ORCID, Križan P.ORCID, Krokovny P.ORCID, Kuhr T.ORCID, Kumar D.ORCID, Kumar R.ORCID, Kuzmin A.ORCID, Kwon Y.-J.ORCID, Lai Y.-T.ORCID, Lam T.ORCID, Lange J. S.ORCID, Laurenza M.ORCID, Lee S. C.ORCID, Li L. K.ORCID, Li Y. B.ORCID, Li Gioi L.ORCID, Libby J.ORCID, Lieret K.ORCID, Lin Y.-R.ORCID, Liventsev D.ORCID, Luo T.ORCID, Ma Y.ORCID, Masuda M.ORCID, Maurya S. K.ORCID, Meier F.ORCID, Merola M.ORCID, Miyabayashi K.ORCID, Mizuk R.ORCID, Mohanty G. B.ORCID, Mussa R.ORCID, Nakamura I.ORCID, Nakao M.ORCID, Natkaniec Z.ORCID, Natochii A.ORCID, Nayak L.ORCID, Nishida S.ORCID, Ogawa S.ORCID, Ono H.ORCID, Oskin P.ORCID, Pakhlov P.ORCID, Pakhlova G.ORCID, Pardi S.ORCID, Park H.ORCID, Park J.ORCID, Park S.-H.ORCID, Passeri A.ORCID, Patra S.ORCID, Paul S.ORCID, Pestotnik R.ORCID, Piilonen L. E.ORCID, Podobnik T.ORCID, Prencipe E.ORCID, Prim M. T.ORCID, Röhrken M.ORCID, Rostomyan A.ORCID, Rout N.ORCID, Russo G.ORCID, Sandilya S.ORCID, Santelj L.ORCID, Savinov V.ORCID, Schnell G.ORCID, Schwanda C.ORCID, Seino Y.ORCID, Senyo K.ORCID, Sevior M. E.ORCID, Shan W.ORCID, Sharma C.ORCID, Shen C. P.ORCID, Shiu J.-G.ORCID, Singh J. B.ORCID, Sokolov A.ORCID, Solovieva E.ORCID, Starič M.ORCID, Sumihama M.ORCID, Takizawa M.ORCID, Tanida K.ORCID, Tenchini F.ORCID, Unno Y.ORCID, Uno S.ORCID, Ushiroda Y.ORCID, Vahsen S. E.ORCID, Wang M.-Z.ORCID, Watanuki S.ORCID, Won E.ORCID, Yabsley B. D.ORCID, Yan W.ORCID, Yin J. H.ORCID, Yuan L.ORCID, Zhang Z. P.ORCID, Zhilich V.ORCID, Zhukova V.ORCID,
Abstract
We report a search for a heavy neutral lepton (HNL) that mixes predominantly with ντ. The search utilizes data collected with the Belle detector at the KEKB asymmetric energy e+e− collider. The data sample was collected at and just below the center-of-mass energies of the ϒ(4S) and ϒ(5S) resonances and has an integrated luminosity of 915 fb−1, corresponding to (836±12)×106 e+e−→τ+τ− events. We search for production of the HNL (denoted N) in the decay τ−→π−N followed by its decay via N→μ+μ−ντ. The search focuses on the parameter-space region in which the HNL is long-lived, so that the μ+μ− originate from a common vertex that is significantly displaced from the collision point of the KEKB beams. Consistent with the expected background yield, one event is observed in the data sample after application of all the event-selection criteria. We report limits on the mixing parameter of the HNL with the τ neutrino as a function of the HNL mass.
Published by the American Physical Society
2024
Funder
Ministry of Education, Culture, Sports, Science and Technology Japan Society for the Promotion of Science Nagoya University Australian Research Council Bundesministerium für Bildung, Wissenschaft und Forschung Austrian Science Fund National Natural Science Foundation of China Key Research Program of Frontier Science, Chinese Academy of Sciences Natural Science Foundation of Shandong Province Ministerstvo Školství, Mládeže a Tělovýchovy Grantová Agentura České Republiky H2020 European Research Council Carl-Zeiss-Stiftung Deutsche Forschungsgemeinschaft Volkswagen Foundation Department of Atomic Energy, Government of India Department of Science and Technology, Ministry of Science and Technology, India Istituto Nazionale di Fisica Nucleare Sezione di Padova National Research Foundation of Korea Korea Institute of Science and Technology Information Korea Research Environment Open Network Ministerstwo Edukacji i Nauki Narodowe Centrum Nauki Ministry of Science and Higher Education of the Russian Federation National Research University Higher School of Economics University of Tabuk Javna Agencija za Raziskovalno Dejavnost RS Ikerbasque, Basque Foundation for Science Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Ministry of Education Ministry of Science and Technology, Taiwan U.S. Department of Energy National Science Foundation High Energy Accelerator Research Organization Pacific Northwest National Laboratory Environmental Molecular Sciences Laboratory National Institute of Informatics Excellence Cluster Universe Radiation Science Research Institute Foreign Large-size Research Facility Application Supporting project GLORIAD Science Information NETwork 6
Publisher
American Physical Society (APS)
|
|