MINOS Document 5437-v8

Interpretation of the Underground Muon Charge Ratio

Document #:
Document type:
Journal Publication
Submitted by:
Maury C Goodman
Updated by:
Maury C Goodman
Document Created:
12 Dec 2008, 16:08
Contents Revised:
04 Jun 2009, 16:55
Metadata Revised:
04 Jun 2009, 16:55
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29 May 2009, 16:49
22 Mar 2009, 09:46
10 Mar 2009, 14:41
25 Feb 2009, 14:28
04 Feb 2009, 10:15
03 Feb 2009, 18:41
12 Dec 2008, 16:08
The MINOS experiment has observed a rise in the underground
muon charge ratio $r_\mu$ = ${\mu^+/\mu^-}$. This ratio can be related to
the atmospheric production ratios of ${\pi^+/\pi^-}$ and ${K^+/K^-}$.
Our analysis indicates that the relevant variable for studying the charge ratio+
$\ecos$, rather than $\emu$. We compare a simple energy dependent
parameterization of the rise in the charge ratio with
more detailed previously published Monte Carlo calculations.
We also discuss the importance of two previously neglected effects in
this context: the charge sign dependency of the dE/dx in rock, and
the energy dependence of heavy primaries on the ${K^+/K^-}$ ratio.
Files in Document:
  • .pdf (ASTROPARTPHYS-D-09-00036.pdf, 511.0 kB)
Notes and Changes:
2 rounds of small changes requested by reviewer.
This is the version that was "accepted"
Related Documents:
  • MINOS-doc-6011: Referee's comments on technical paper on charge ratio
Referenced by:
  • MINOS-doc-6011: Referee's comments on technical paper on charge ratio
  • MINOS-doc-6146: Impact of Chemical Composition of Cosmic Ray on Atmospheric Muon Charge Ratio
Publication Information:
Ms. Ref. No.: ASTROPARTPHYS-D-09-00036
Title: Interpretation of the Underground Muon Charge Ratio
Astroparticle Physics
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