July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Seasonal Variations of multiple-muons in NOvA

Jul 31, 2017, 7:10 PM
Reception Area (Fermi National Accelerator Laboratory)

Reception Area

Fermi National Accelerator Laboratory

Poster Cosmology and Astrophysics Poster Session and Reception


Prof. Philip Schreiner (Benedictine University)


Seasonal variations of cosmic ray muons have been well-measured by a number of underground experiments at a variety of overburdens and it has been found that the rate of muons increases in the summer and decreases in the winter. This is understood from the properties of the atmosphere as the temperature varies. But with large statistics the seasonal variation of multiple muons was measured in the MINOS ND (225 mwe) and the MINOS FD (2100 mwe). The rates increase in the winter and decrease in the summer, opposite to the result for single muons. Several hypotheses for this unexpected result were considered, but the effect is not currently explained. New data from the NOvA ND (225 mwe) will be used to study the situation further.

Primary author

Maury Goodman (Argonne)


Prof. Philip Schreiner (Benedictine University) Prof. Ricardo Gomes (Federal University of Goias - UFG) Ms Stefano Castro Tognini (Federal University of Goias)

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