Looking forward to test the KOTO anomaly with FASER

Abstract

The search for light and long-lived particles at the LHC will be intensified in the upcoming years with a prominent role of the new FASER experiment. In this study, we discuss how FASER could independently probe such scenarios relevant for new physics searches at kaon factories. We put an emphasis on the proposed explanations for the recently observed three anomalous events in the KOTO experiment. The baseline of FASER precisely corresponds to the proposed lifetime solution to the anomaly that avoids the NA62 bounds on charged kaons. As a result, the experiment can start constraining relevant models within the first few weeks of its operation. In some cases, it can confirm a possible discovery with up to 10000 spectacular high-energy events in FASER during LHC Run 3. Further complementarities between FASER and kaon factories, which employ FASER capability to study di-photon signatures, are illustrated for the model with axion-like particles dominantly coupled to $SU(2{)}_W$ gauge bosons.

Version published in PRD

References in corpus (55)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• An Introduction to PYTHIA 8.2
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• EPOS LHC : test of collective hadronization with LHC data
• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• New Results on B->pi, K, eta Decay Formfactors from Light-Cone Sum Rules
• B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited
• Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report
• Collider Probes of Axion-Like Particles
• FASER: ForwArd Search ExpeRiment at the LHC
• Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
• FASER's Physics Reach for Long-Lived Particles
• Implications of Generalized Z-Z' Mixing
• Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c
• $K_L\to {\pi }^0\nu \bar{\nu }$ Beyond the Standard Model
• Revised constraints and Belle II sensitivity for visible and invisible axion-like particles
• "Dark" Z implications for Parity Violation, Rare Meson Decays, and Higgs Physics
• $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ and $K_L\to {\pi }^0\nu \bar{\nu }$ in the Standard Model: Status and Perspectives
• Searching for Long-lived Particles: A Compact Detector for Exotics at LHCb
• New measurement of the K+ => pi+,nu,nubar branching ratio
• Detecting and Studying High-Energy Collider Neutrinos with FASER at the LHC
• Search for $K_L\to {\pi }^0\nu \overline{\nu }$ and $K_L\to {\pi }^0{X}^0$ Decays at the J-PARC KOTO Experiment
• Search for $\mathbf{B}\to \mathbf{h\nu }\bar{\mathbf{\nu }}$ decays with semileptonic tagging at Belle
• A New Flavor of Searches for Axion-Like Particles
• Coupling QCD-scale axion-like particles to gluons
• Heavy Neutral Leptons at FASER
• Inelastic Dark Matter at the LHC Lifetime Frontier: ATLAS, CMS, LHCb, CODEX-b, FASER, and MATHUSLA
• Search for the Rare Decay KL --> pi0 ee
• Dark Higgs Bosons at FASER
• ALPs at FASER: The LHC as a Photon Beam Dump
• Flavor constraints on electroweak ALP couplings
• Technical Proposal for FASER: ForwArd Search ExpeRiment at the LHC
• Light Scalars and the KOTO Anomaly
• Phenomenology of GeV-scale scalar portal
• New physics implications of recent search for $K_L\to {\pi }^0\nu \bar{\nu }$ at KOTO
• Extending the reach of FASER, MATHUSLA, and SHiP towards smaller lifetimes using secondary particle production
• Loophole in K --> pi nu nubar Search and New Weak Leptonic Forces
• Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma
• Letter of Intent for FASER: ForwArd Search ExpeRiment at the LHC
• Constraints on long-lived light scalars with flavor-changing couplings and the KOTO anomaly
• Dark sector origin of the KOTO and MiniBooNE anomalies
• Probing Light Gauge Bosons in Tau Neutrino Experiments
• Technical Proposal: FASERnu
• A little theory of everything, with heavy neutral leptons
• A Light Scalar Explanation of $(g-2{)}_{\mu }$ and the KOTO Anomaly
• Light vectors coupled to bosonic currents
• Light gauge boson interpretation for $(g-2{)}_{\mu }$ and the $K_L\to {\pi }^0+\text{(invisible)}$ anomaly at the J-PARC KOTO experiment
• Implication of $K\to \pi \nu \bar{\nu }$ for generic neutrino interactions in effective field theories
• Pair production of dark particles in meson decays
• The Scikit-HEP Project
• Breaking the Grossman-Nir Bound in Kaon Decays
• Higgs Portal From The Atmosphere To Hyper-K
• Imprint of a new light particle at KOTO?
• Cosmological implications of the KOTO excess

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• The Forward Physics Facility: Sites, Experiments, and Physics Potential
• The Present and Future Status of Heavy Neutral Leptons
• Running in the ALPs
• Forward Neutrino Fluxes at the LHC
• FORESEE: FORward Experiment SEnsitivity Estimator for the LHC and future hadron colliders
• Detecting Dark Matter with Far-Forward Emulsion and Liquid Argon Detectors at the LHC
• FORMOSA: Looking Forward to Millicharged Dark Sectors
• FACET: A new long-lived particle detector in the very forward region of the CMS experiment
• Neutral Current Neutrino Interactions at FASER$\nu$
• Neutrino beam-dump experiment with FASER at the LHC
• Predictions for Neutrinos and New Physics from Forward Heavy Hadron Production at the LHC
• ALP Searches at the LHC: FASER as a Light Shining through Walls Experiment
• The LHC as a TeV Muon Beam Dump: Muonphilic Scalars at FASER
• The Forward Physics Facility at the High-Luminosity LHC
• New Physics Searches at Kaon and Hyperon Factories
• Detection of collinear high energetic di-photon signatures with Micromegas Detectors