Search for the HyperCP event at the LHCb experiment

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Abstract

The HyperCP experiment reported on the observation of three events for the decay Σ+ → pμ + μ − with nexpectedly narrow dimuon mass distribution, suggesting that the decay may proceed via a new intermediate state of mass 214.3 ± 0.5 MeV/c 2. In order to either confirm or refute such a new particle, we propose to search for the decay Σ+ → pX, X→μ + μ − at the LHCb experiment at LHC. We firstly study the Σ+ production rate at 14TeV of center-of-mass-energy with the nominal luminosity, 2 fb−1 per year, of the LHCb experiment with the PYTHIA event generator, and the Σ+ production rate is about 4.37×1013 per year. By taking into account the angular distributions and momenta for the daughter particles from the decay Σ+→pX, X→μ + μ − for either pseudoscalar or axial-vector X particle, we estimate the acceptance for such a decay at the LHCb detector. We expect that a few hundred events per year for the decay Σ+→pX, X→μ + μ − can be reconstructed at the LHCb experiment.

Keywords

Rare Decays Beyond Standard Model Hadronic Colliders 
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Copyright information

© SISSA, Trieste, Italy 2010

Authors and Affiliations

  1. 1.Center for High Energy PhysicsKyungpook National UniversityDaeguKorea

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