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Observation of seasonal variation of atmospheric multiple-muon events in the NOvA Near Detector

  • Author(s): Acero, MA;
  • Adamson, P;
  • Aliaga, L;
  • Alion, T;
  • Allakhverdian, V;
  • Altakarli, S;
  • Anfimov, N;
  • Antoshkin, A;
  • Aurisano, A;
  • Back, A;
  • Backhouse, C;
  • Baird, M;
  • Balashov, N;
  • Baldi, P;
  • Bambah, BA;
  • Bashar, S;
  • Bays, K;
  • Bending, S;
  • Bernstein, R;
  • Bhatnagar, V;
  • Bhuyan, B;
  • Bian, J;
  • Blair, J;
  • Booth, AC;
  • Bour, P;
  • Bromberg, C;
  • Buchanan, N;
  • Butkevich, A;
  • Calvez, S;
  • Campbell, M;
  • Carroll, TJ;
  • Catano-Mur, E;
  • Cedeno, A;
  • Childress, S;
  • Choudhary, BC;
  • Chowdhury, B;
  • Coan, TE;
  • Colo, M;
  • Corwin, L;
  • Cremonesi, L;
  • Davies, GS;
  • Derwent, PF;
  • Ding, P;
  • Djurcic, Z;
  • Doyle, D;
  • Dukes, EC;
  • Duyang, H;
  • Edayath, S;
  • Ehrlich, R;
  • Feldman, GJ;
  • Filip, P;
  • Flanagan, W;
  • Frank, MJ;
  • Gallagher, HR;
  • Gandrajula, R;
  • Gao, F;
  • Germani, S;
  • Giri, A;
  • Gomes, RA;
  • Goodman, MC;
  • Grichine, V;
  • Groh, M;
  • Group, R;
  • Guo, B;
  • Habig, A;
  • Hakl, F;
  • Hartnell, J;
  • Hatcher, R;
  • Hatzikoutelis, A;
  • Heller, K;
  • Hewes, J;
  • Himmel, A;
  • Holin, A;
  • Howard, B;
  • Huang, J;
  • Hylen, J;
  • Jediny, F;
  • Johnson, C;
  • Judah, M;
  • Kakorin, I;
  • Kalra, D;
  • Kaplan, DM;
  • Keloth, R;
  • Klimov, O;
  • Koerner, LW;
  • Kolupaeva, L;
  • Kotelnikov, S;
  • Kreymer, A;
  • Kulenberg, C;
  • Kumar, A;
  • Kuruppu, CD;
  • Kus, V;
  • Lackey, T;
  • Lang, K;
  • Lin, S;
  • Lokajicek, M;
  • Lozier, J;
  • Luchuk, S;
  • Magill, S;
  • Mann, WA
  • et al.
Abstract

Using two years of data from the NOvA Near Detector at Fermilab, we report a seasonal variation of cosmic ray induced multiple-muon (Nμ≥2) event rates which has an opposite phase to the seasonal variation in the atmospheric temperature. The strength of the seasonal multiple-muon variation is shown to increase as a function of the muon multiplicity. However, no significant dependence of the strength of the seasonal variation of the multiple-muon variation is seen as a function of the muon zenith angle, or the spatial or angular separation between the correlated muons.

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