Measurement of the cosmic ray muon flux seasonal variation with the   OPERA detector

N. Agafonova; A. Alexandrov; A. Anokhina; S. Aoki; A. Ariga; T. Ariga,; A. Bertolin; C. Bozza; R. Brugnera; A. Buonaura; S. Buontempo; M.; Chernyavskiy; A. Chukanov; L. Consiglio; N. D'Ambrosio; G. De Lellis; M. De; Serio; P. del Amo Sanchez; A. Di Crescenzo; D. Di Ferdinando; N. Di Marco; S.; Dmitrievsky; M. Dracos; D. Duchesneau; S. Dusini; T. Dzhatdoev; J. Ebert; A.; Ereditato; R. A. Fini; F. Fornari; T. Fukuda; G. Galati; A. Garfagnini; V.; Gentile; J. Goldberg; S. Gorbunov; Y. Gornushkin; G. Grella; A. M. Guler; C.; Gustavino; C. Hagner; T. Hara; T. Hayakawa; A. Hollnagel; K. Ishiguro; A.; Iuliano; K. Jakov\v{c}i\'c; C. Jollet; C. Kamiscioglu; M. Kamiscioglu; S. H.; Kim; N. Kitagawa; B. Kli\v{c}ek; K. Kodama; M. Komatsu; U. Kose; I. Kreslo,; F. Laudisio; A. Lauria; A. Ljubi\v{c}i\'c; A. Longhin; P. Loverre; A. Malgin,; G. Mandrioli; T. Matsuo; V. Matveev; N. Mauri; E. Medinaceli; A. Meregaglia,; S. Mikado; M. Miyanishi; F. Mizutani; P. Monacelli; M. C. Montesi; K.; Morishima; M. T. Muciaccia; N. Naganawa; T. Naka; M. Nakamura; T. Nakano; K.; Niwa; S. Ogawa; N. Okateva; K. Ozaki; A. Paoloni; L. Paparella; B. D. Park,; L. Pasqualini; A. Pastore; L. Patrizii; H. Pessard; D. Podgrudkov; N.; Polukhina; M. Pozzato; F. Pupilli; M. Roda; T. Roganova; H. Rokujo; G. Rosa,; O. Ryazhskaya; O. Sato; A. Schembri; I. Shakiryanova; T. Shchedrina; E.; Shibayama; H. Shibuya; T. Shiraishi; S. Simone; C. Sirignano; G. Sirri; A.; Sotnikov; M. Spinetti; L. Stanco; N. Starkov; S. M. Stellacci; M.; Stip\v{c}evi\'c; P. Strolin; S. Takahashi; M. Tenti; F. Terranova; V.; Tioukov; S. Vasina; P. Vilain; E. Voevodina; L. Votano; J. L. Vuilleumier; G.; Wilquet; and C. S. Yoon

arXiv:1810.10783·hep-ex·October 9, 2019

Measurement of the cosmic ray muon flux seasonal variation with the OPERA detector

N. Agafonova, A. Alexandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga,, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, M., Chernyavskiy, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De, Serio, P. del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando

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TL;DR

This paper reports on the measurement of seasonal variations in cosmic ray muon flux using the OPERA detector, highlighting the correlation with atmospheric temperature changes at the underground Gran Sasso laboratory.

Contribution

It presents the first detailed analysis of muon flux seasonal modulation with the OPERA detector, linking underground muon rates to atmospheric temperature variations.

Findings

01

Muon flux varies seasonally underground.

02

Correlation between muon flux and atmospheric temperature.

03

Quantitative measurement of flux modulation amplitude.

Abstract

The OPERA experiment discovered muon neutrino into tau neutrino oscillations in appearance mode, detecting tau leptons by means of nuclear emulsion films. The apparatus was also endowed with electronic detectors with tracking capability, such as scintillator strips and resistive plate chambers. Because of its location, in the underground Gran Sasso laboratory, under 3800 m.w.e., the OPERA detector has also been used as an observatory for TeV muons produced by cosmic rays in the atmosphere. In this paper the measurement of the single muon flux modulation and of its correlation with the seasonal variation of the atmospheric temperature are reported.

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