Search for neutral, long-lived particles decaying into two muons in p(p)over-bar collisions at root s=1.96 TeV

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2006-10-20

Autores

Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Agelou, M.
Ahn, S. H.
Ahsan, M.
Alexeev, G. D.

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Amer Physical Soc

Resumo

We present a search for a neutral particle, pair produced in pp collisions at root s=1.96 TeV, which decays into two muons and lives long enough to travel at least 5 cm before decaying. The analysis uses approximate to 380 pb(-1) of data recorded with the D0 detector. The background is estimated to be about one event. No candidates are observed, and limits are set on the pair-production cross section times branching fraction into dimuons + X for such particles. For a mass of 10 GeV and lifetime of 4x10(-11) s, we exclude values greater than 0.14 pb (95% C.L.). These results are used to limit the interpretation of NuTeV's excess of dimuon events.

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Physical Review Letters. College Pk: Amer Physical Soc, v. 97, n. 16, 7 p., 2006.