Improved limit on the branching fraction of the rare decay $K_S^0\to {\mu }^{+}{\mu }^{-}$

Abstract

A search for the decay $K_S^0\to {\mu }^{+}{\mu }^{-}$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb${}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of $\mathcal{B}(K_S^0\to {\mu }^{+}{\mu }^{-})<0.8(1.0)\times 10^{-9}$ at $90\%(95\%)$ confidence level. This result improves the previous upper limit on the branching fraction by an order of magnitude.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-009.html

References in corpus (14)

• XGBoost: A Scalable Tree Boosting System
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• LHCb Detector Performance
• PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
• The LHCb Trigger and its Performance in 2011
• Mass distributions marginalized over per-event errors
• Search for the decay $B_s^0\to {\overline{D}}^0{f}_0(980)$
• On the short-distance constraints from K_{L,S} -> mu^+ mu^-
• Performance of the Muon Identification at LHCb
• Radiative Non-Leptonic Kaon Decays
• Search for the rare decay KS -> mu+ mu-
• Dispersive treatment of $K_S\to \gamma \gamma$ and $K_S\to \gamma {\ell }^{+}{\ell }^{-}$

Cited by in corpus (11)

• Constraints on scalar leptoquarks from lepton and kaon physics
• Searching for Confining Hidden Valleys at the LHC(b)
• Gluino-mediated electroweak penguin with flavor-violating trilinear couplings
• Are the CKM anomalies induced by vector-like quarks? Limits from flavor changing and Standard Model precision tests
• Constraints on the $K_{\mathrm{S}}^0\to {\mu }^{+}{\mu }^{-}$ branching fraction
• Classification of anomaly-free 2HDMs with a gauged U(1)' symmetry
• Probing SUSY effects in $K_S^0\to {\mu }^{+}{\mu }^{-}$
• Another SMEFT Story: $Z^{\prime }$ Facing New Results on ${\epsilon }^{\prime }/\epsilon$, $\Delta M_K$ and $K\to \pi \nu \bar{\nu }$
• Three decades of FCNC studies in 3-3-1 model with right-handed neutrinos: from $Z^{\prime }$-dominance to the alignment limit
• Prospects for kaon physics at LHCb
• New Physics Hints from Flavour