An additional study of multi-muon events produced in [image] collisions at [image] 1.95 TeV

We present one additional study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. We use a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 3.9 fb-1. We investigate the distribution of the azimuthal...

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Bibliographic Details
Published in:Physics letters. B 2012-04, Vol.710 (2), p.278-283
Main Authors: Aaltonen, T, Alvarez Gonzalez, B, Amerio, S, Amidei, D, Anastassov, A, Annovi, A, Antos, J, Apollinari, G, Apresyan, A, Arisawa, T, Et. Al
Format: Article
Language:English
Subjects:
Collisions
Detectors
Elementary particles
Luminosity
Muons
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Summary:We present one additional study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. We use a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 3.9 fb-1. We investigate the distribution of the azimuthal angle between the two trigger muons in events containing at least four additional muon candidates to test the compatibility of these events with originating from known QCD processes. We find that this distribution is markedly different from what is expected from such QCD processes and this observation strongly disfavors the possibility that multi-muon events result from an underestimate of the rate of misidentified muons in ordinary QCD events.
ISSN:0370-2693
DOI:10.1016/j.physletb.2012.02.081