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Seasonal variation of multiple-muon - J Hartnell.pdf (413.85 kB)

Seasonal variation of multiple-muon cosmic ray air showers observed in the NOvA detector on the surface

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posted on 2023-06-10, 01:28 authored by M A Acero, P Adamson, L Aliaga, N Anfimov, A Antoshkin, E Arrieta-Diaz, Lily AsquithLily Asquith, M Baird, Alexander Craig Booth, Jeff HartnellJeff Hartnell, Robert KralikRobert Kralik, Pierre Lasorak, Brett MayesBrett Mayes, Joshua PorterJoshua Porter, Yibing Zhang, others
We report the rate of cosmic ray air showers with multiplicities exceeding 15 muon tracks recorded in the NOvA Far Detector between May 2016 and May 2018. The detector is located on the surface under an overburden of 3.6 meters water equivalent. We observe a seasonal dependence in the rate of multiple-muon showers, which varies in magnitude with multiplicity and zenith angle. During this period, the effective atmospheric temperature and surface pressure ranged between 210 K and 230 K and 940 mbar and 990 mbar, respectively; the shower rates are anticorrelated with the variation in the effective temperature. The variations are about 30% larger for the highest multiplicities than the lowest multiplicities and 20% larger for showers near the horizon than vertical showers.

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Publication status

  • Published

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  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society

Issue

1

Volume

104

Page range

1-8

Article number

a012014

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2021-10-22

First Open Access (FOA) Date

2021-10-22

First Compliant Deposit (FCD) Date

2021-10-21

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    University of Sussex (Publications)

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