Evidence for the Decay Sigma+ -> p mu+ mu-

H.K. Park , R.A. Burnstein , A. Chakravorty , Y.C. Chen , W.S. Choong , K. Clark , E.C. Dukes , C. Durandet

show 25 more authors

J. Felix Y. Fu G. Gidal H.R. Gustafson T. Holmstrom M. Huang C. James C. M. Jenkins T. Jones D.M. Kaplan L.M. Lederman N. Leros M.J. Longo F. Lopez L.C. Lu W. Luebke K.B. Luk K.S. Nelson J.-P. Perroud D. Rajaram H.A. Rubin J. Volk C.G. White S. L. White P. Zyla

Authors on Pith no claims yet

classification ✦ hep-ex

keywords sigmadecaybranchingevidenceratiostatsystdata

0 comments

read the original abstract

We report the first evidence for the decay Sigma+ -> p mu+ mu- from data taken by the HyperCP experiment(E871) at Fermilab. Based on three observed events, the branching ratio is B(Sigma+ -> p,mu+,mu-) = [8.6 +6.6,-5.4(stat) +/-5.5(syst)] x 10**-8. The narrow range of dimuon masses may indicate that the decay proceeds via a neutral intermediate state, Sigma+ -> p P0, P0 -> mu+ mu-, with a P0 mass of 214.3 +/- 0.5 MeV/c**2 and branching ratio B(Sigma+ -> p P0; P0 -> mu+ mu-) = [3.1 +2.4,-1.(stat) +/-1.5(syst)] x 10**-8.

This paper has not been read by Pith yet.

discussion (0)

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

CP violation in $\Sigma^+\to p\ell^+\ell^-$ within the standard model and beyond
hep-ph 2026-04 unverdicted novelty 5.0

The CP-violating decay-rate asymmetry in Σ⁺→pℓ⁺ℓ⁻ is allowed to reach tens of percent and is testable at LHCb.