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Modulations of the cosmic muon signal in ten years of Borexino data

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dc.contributor.authorAgostini, M.
dc.contributor.authorAltenmueller, K.
dc.contributor.authorAppel, S.
dc.contributor.authorAtroshchenko, V.
dc.contributor.authorLitvinovich, E.
dc.contributor.authorMachulin, I.
dc.contributor.authorSkorokhvatov, M.
dc.contributor.authorЛитвинович, Евгений Александрович
dc.contributor.authorМачулин, Игорь Николаевич
dc.contributor.authorСкорохватов, Михаил Дмитриевич
dc.date.accessioned2024-11-20T09:42:40Z
dc.date.available2024-11-20T09:42:40Z
dc.date.issued2019
dc.description.abstractWe have measured the flux of cosmic muons in the Laboratori Nazionali del Gran Sasso at 3800 m.w.e. to be (3.432 +/- 0.003) center dot 10(-4) m(-2) s(-1) based on ten years of Borexino data acquired between May 2007 and May 2017. A seasonal modulation with a period of (366.3 +/- 0.6) d and a relative amplitude of (1.36 +/- 0.04)% is observed. The phase is measured to be (181.7 +/- 0.4) d, corresponding to a maximum at the 1 st of July. Using data inferred from global atmospheric models, we show the muon flux to be positively correlated with the atmospheric temperature and measure the e ff ective temperature coe ffi cient alpha(T) = 0.90 +/- 0.02. The origin of cosmic muons from pion and kaon decays in the atmosphere allows to interpret the e ff ective temperature coe ffi cient as an indirect measurement of the atmospheric kaon-topion production ratio r(K/pi) = 0.11(-0.07)(+0.11) for primary energies above 18TeV. We find evidence for a long-term modulation of the muon flux with a period of similar to 3000 d and a maximum in June 2012 that is not present in the atmospheric temperature data. A possible correlation between this modulation and the solar activity is investigated. The cosmogenic neutron production rate is found to show a seasonal modulation in phase with the cosmic muon flux but with an increased amplitude of (2.6 +/- 0.4)%.
dc.identifier.citationModulations of the cosmic muon signal in ten years of Borexino data / Agostini, M [et al.] // Journal of Cosmology and Astroparticle Physics. - 2019. - № 2. - 10.1088/1475-7516/2019/02/046
dc.identifier.doi10.1088/1475-7516/2019/02/046
dc.identifier.urihttps://www.doi.org/10.1088/1475-7516/2019/02/046
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85062260608&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000459570400001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/16608
dc.relation.ispartofJournal of Cosmology and Astroparticle Physics
dc.titleModulations of the cosmic muon signal in ten years of Borexino data
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue2
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