Updated constraints on sterile neutrino mixing in the OPERA experiment using a new νe identification method

被引：1

作者：

Agafonova, N.

Alexandrov, A.

Anokhina, A.

Aoki, S.

Ariga, A.

Ariga, T.

Bertolin, A.

Bozza, C.

Brugnera, R.

Buontempo, S.

Chernyavskiy, M.

Chukanov, A.

Consiglio, L.

D'Ambrosio, N.

De Lellis, G.

De Serio, M.

Sanchez, P. del Amo

Di Crescenzo, A.

Di Ferdinando, D.

Di Marco, N.

Dmitrievsky, S.

Dracos, M.

Duchesneau, D.

Dusini, S.

Dzhatdoev, T.

Ebert, J.

Ereditato, A.

Fini, R. A.

Fukuda, T.

Galati, G.

Garfagnini, A.

Gentile, V.

Goldberg, J.

Gorbunov, S.

Gornushkin, Y.

Grella, G.

Guler, A. M.

Gustavino, C.

Hagner, C.

Hara, T.

Hayakawa, T.

Hollnagel, A.

Ishiguro, K.

Iuliano, A.

Jakovcc, K.

Jollet, C.

Kamiscioglu, C.

Kamiscioglu, M.

Kim, S. H.

Kitagawa, N.

机构：

[1] INR – Institute for Nuclear Research, The Russian Academy of Sciences, Moscow

[2] INFN Sezione di Napoli, Napoli

[3] SINP MSU – Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow

[4] Kobe University, Kobe

[5] Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern

[6] Faculty of Arts and Science, Kyushu University, Fukuoka

[7] INFN Sezione di Padova, Padova

[8] Dipartimento di Fisica dell’Università di Salerno and “Gruppo Collegato, INFN, Salerno, Fisciano

[9] Dipartimento di Fisica e Astronomia dell’Università di Padova, Padova

[10] LPI – Lebedev Physical Institute, The Russian Academy of Sciences, Moscow

[11] JINR – Joint Institute for Nuclear Research, Dubna

[12] INFN – Laboratori Nazionali del Gran Sasso, Assergi (L’Aquila)

[13] Dipartimento di Fisica dell’Università Federico II di Napoli, Napoli

[14] CERN, European Organization for Nuclear Research, Geneva

[15] Dipartimento di Fisica dell’Università di Bari, Bari

[16] INFN Sezione di Bari, Bari

[17] LAPP, Université Savoie Mont Blanc, CNRS, IN2P3, Annecy-le-Vieux

[18] INFN Sezione di Bologna, Bologna

[19] IPHC, Université de Strasbourg, CNRS, IN2P3, Strasbourg

[20] Hamburg University, Hamburg

[21] Nagoya University, Nagoya

[22] GSSI, Gran Sasso Science Institute, L’Aquila

[23] Department of Physics, Technion, Haifa

[24] METU, Middle East Technical University, Ankara

[25] INFN Sezione di Roma, Roma

[26] Rudj er Bošković Institute, Zagreb

[27] Ankara University, Ankara

[28] Gyeongsang National University, Jinju-daero, Jinju

[29] Center of Excellence for Advanced Materials and Sensing Devices, Ruder Boškovć Institute, Zagreb

[30] Aichi University of Education, Kariya (Aichi-Ken)

[31] Toho University, Funabashi

[32] Dipartimento di Fisica e Astronomia dell’Università di Bologna, Bologna

[33] Nihon University, Chiba, Narashino

[34] INFN, Laboratori Nazionali di Frascati dell’INFN, Frascati, Roma

[35] MEPhI, Moscow Engineering Physics Institute, Moscow

[36] Dipartimento di Fisica dell’Università di Milano-Bicocca, Milano

[37] IIHE, Université Libre de Bruxelles, Brussels

来源：

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2023年 / 2023卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1093/ptep/ptad012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This paper describes a new v(e) identification method specifically designed to improve the low-energy (< 30 GeV) nu(e) identification efficiency attained by enlarging the emulsion film scanning volume with the next-generation emulsion readout system. A relative increase of 25-70% in the nu(e) low-energy region is expected, leading to improvements in the OPERA sensitivity to neutrino oscillations in the framework of the 3 + 1 model. The method is applied to a subset of data where the detection efficiency increase is expected to be more relevant, and one additional nu(e) candidate is found. The analysis combined with the nu(tau) appearance results improves the upper limit on sin (2)2 theta(mu e) to 0.016 at 90% C.L. in the Mini-BooNE allowed region Delta m(41)(2) similar to 0.3 eV(2).

引用

页数：12

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