Evidence for the decay Sigma+ ---> p mu+ mu [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 4 pages : digital, PDF file
Additional Creators:: Fermi National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

We report the first evidence for the decay Σ⁺ → pμ⁺μ⁻ from data taken by the HyperCP (E871) experiment at Fermilab. Based on three observed events, the branching ratio is Β(Σ⁺ → pμ⁺μ⁻) = [8.6{sub -5.4}{sup +6.6}(stat) ± 5.5(syst)] x 10⁻⁸. The narrow range of dimuon masses may indicate that the decay proceeds via a neutral intermediate state, Σ⁺ → pP°,P° → μ⁺μ⁻ with a P° mass of 214.3 ± 0.5 MeV/c² and branching ratio Β(Σ⁺ → pP°, P° → μ⁺μ⁻) = [3.1{sub -1.9}{sup +2.4}(stat) ± 1.5(syst)] x 10⁻⁸.

Report Numbers:

E 1.99:fermilab-pub-05-006-e
fermilab-pub-05-006-e

Subject(s):

Physics Of Elementary Particles And Fields

Other Subject(s):

Note:

Published through SciTech Connect.
01/01/2005.
"fermilab-pub-05-006-e"
"arXiv eprint number hep-ex/0501014"
Physical Review Letters 94 ISSN 0031-9007; PRLTAO FT
Jones, T.; Lederman, L.M.; Jenkins, C.M.; Dukes, E.C.; James, C.; Kaplan, D.M.; Clark, K.; Chen, Y.C.; Gidal, G.; Huang, M.; Fu, Y.; Felix, J.; Longo, M.J.; Choong, W.S.; Leros, N.; Burnstein, R.A.; Durandet, C.; Chakravorty, A.; Holmstrom, T.; Gustafson, H.R.; Park, HyangKyu.

Funding Information:

AC02-76CH03000

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