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research article
Evidence for the decay ∑+ → pμ+ μ-
We report the first evidence for the decay ∑+ → pμ+ μ- from data taken by the HyperCP (E871) experiment at Fermilab. Based on three observed events, the branching ratio is B(∑+ → pμ+ μ-) = [8.6 -5.4 +6.6(stat) ± 5.5(syst)] × 10 -8. The narrow range of dimuon masses may indicate that the decay proceeds via a neutral intermediate state, ∑+ rarr; pp0, p0 → μ+ μ- with a P0 mass of 214.3 ± 0.5 MeV/c 2 and branching ratio B(∑+ rarr; pp 0, p0 → μ+ μ-) = [3.1-1.9 -2.4(stat) ± 1.5(syst)] × 10 -8. © 2005 The American Physical Society.
Type
research article
Scopus ID
2-s2.0-18144414341
Authors
Park, H.K.
•
Burnstein, R.A.
•
Chakravorty, A.
•
Chen, Y.C.
•
Choong, W.S.
•
Clark, K.
•
Dukes, E.C.
•
Durandet, C.
•
Felix, J.
•
Fu, Y.
Publication date
2005
Published in
Volume
94
Issue
2
Article Number
021801
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
November 5, 2010
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