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Testing the HyperCP anomaly at LHCb: evidence for the $\Sigma^+ \to p \mu^+ \mu^-$ decay
A search for Σ+ → pµ + µ − decays with LHCb Run 1 data is presented, yielding an evidence for this decay and a measurement of a branching fraction compatible with the Standard Model. The HyperCP anomaly in the dimuon invariant mass distribution is not confirmed, and its branching fraction central va...
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| Lenguaje: | eng |
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2019
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| Acceso en línea: | https://dx.doi.org/10.1088/1742-6596/1526/1/012021 http://cds.cern.ch/record/2698217 |
| Sumario: | A search for Σ+ → pµ + µ − decays with LHCb Run 1 data is presented, yielding an evidence for this decay and a measurement of a branching fraction compatible with the Standard Model. The HyperCP anomaly in the dimuon invariant mass distribution is not confirmed, and its branching fraction central value is excluded at 95% CL. Prospects for the future of this measurement in LHCb are also presented. |
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