arxiv: 1712.08606 · v2 · submitted 2017-12-22 · ✦ hep-ex
Recognition: unknown
Evidence for the rare decay Sigma^+ to p μ^+ μ^-
show 785 more authors
Are you an author? Sign in to claim this paper.
read the original abstract
A search for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of $3 fb^{-1}$. An excess of events is observed with respect to the background expectation, with a signal significance of 4.1 standard deviations. No significant structure is observed in the dimuon invariant mass distribution, in contrast with a previous result from the HyperCP experiment. The measured $\Sigma^+ \to p \mu^+ \mu^-$ branching fraction is $(2.2\,^{+\,1.8}_{-\,1.3})\times 10^{-8}$, where statistical and systematic uncertainties are included, which is consistent with the Standard Model prediction.
This paper has not been read by Pith yet.
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.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.