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Article
Evidence for the Decay Σ+→pμ+μ-
Physical Review Letters
  • H. K Park, University of Michigan - Ann Arbor
  • Timothy Holmstrom, Longwood University
  • HyperCP Collaboration, HyperCP Collaboration
Document Type
Article
Publication Date
1-18-2005
Abstract
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 B(Σ+→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, Σ+→pP0,P0→μ+μ- with a P0 mass of 214.3±0.5  MeV/c2 and branching ratio B(Σ+→pP0,P0→μ+μ-)=[3.1-1.9+2.4(stat)±1.5(syst)]×10-8.
DOI
10.1103/PhysRevLett.94.021801
Version
Publisher's PDF
Disciplines
Comments

© 2005 The American Physical Society. The original publication is available at http://link.aps.org/doi/10.1103/PhysRevLett.94.021801.

Original Citation

Phys. Rev. Lett. 94, 021801 (2005)

Citation Information
H. K Park, Timothy Holmstrom and HyperCP Collaboration. "Evidence for the Decay Σ+→pμ+μ-" Physical Review Letters Vol. 94 Iss. 2 (2005) p. 021801-1 - 021801-4
Available at: http://works.bepress.com/timothy_holmstrom/3/