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Search for excited muons in pp-bar collisions at s√=1.96 TeV
Baringer, Philip S. Bean, Alice Coppage, Don Gardner, J. Hensel, Carsten Moulik, Tania Wilson, Graham Wallace
Baringer, Philip S.
Bean, Alice
Coppage, Don
Gardner, J.
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
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Abstract
We present the results of a search for the production of an excited state of the muon, μ∗, in proton antiproton collisions at s√=1.96 TeV. The data have been collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately 380 pb(−1). We search for μ∗ in the process pp-bar→μ∗μ, with the μ∗ subsequently decaying to a muon plus photon. No excess above the standard model expectation is observed in data. Interpreting our data in the context of a model that describes μ∗ production by four-fermion contact interactions and μ∗ decay via electroweak processes, we set a 95% confidence level production cross section upper limit ranging from 0.057 to 0.112 pb, depending on the mass of the excited muon. Choosing the scale for contact interactions to be Λ=1 TeV, excited muon masses below 618 GeV are excluded.
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This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.73.111102.
Date
2006-06-02
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American Physical Society
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Abazov et al. "Search for excited muons in pp-bar collisions at sqrt(s) = 1.96 TeV. Physical Review D, 73(11):111102(R). http://dx.doi.org/10.1103/PhysRevD.73.111102