Non-standard semileptonic hyperon decays

Abstract

We investigate the discovery potential of semileptonic hyperon decays in terms of searches of new physics at teraelectronvolt scales. These decays are controlled by a small $SU(3)$-flavor breaking parameter that allows for systematic expansions and accurate predictions in terms of a reduced dependence on hadronic form factors. We find that muonic modes are very sensitive to non-standard scalar and tensor contributions and demonstrate that these could provide a powerful synergy with direct searches of new physics at the LHC.

v2. Comparison with direct searches of new physics at the LHC presented

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• Prospects for rare and forbidden hyperon decays at BESIII
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• Effective-field theory analysis of the ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays
• Nucleon matrix elements of the antisymmetric quark tensor
• Exclusive hadronic tau decays as probes of non-SM interactions
• Effective-field theory analysis of the ${\tau }^{-}\to (K\pi {)}^{-}{\nu }_{\tau }$ decays
• Effective-field theory analysis of the ${\tau }^{-}\to {\eta }^{(\prime )}{\pi }^{-}{\nu }_{\tau }$ decays
• CP asymmetry in $\tau \to K_S\pi {\nu }_{\tau }$ decays within the Standard Model and beyond
• Testing SU(3) Flavor Symmetry in Semileptonic and Two-body Nonleptonic Decays of Hyperons
• Non-Standard Neutrino Interactions : Obviating Oscillation Experiments
• New physics in $s\to d$ semileptonic transitions: rare hyperon vs. kaon decays
• Hyperon semileptonic decays in QCD sum rules
• Global constraints on neutral-current generalized neutrino interactions
• $CP$ asymmetry in the angular distributions of $\tau \to K_S\pi {\nu }_{\tau }$ decays -- II: general effective field theory analysis
• Effective-field theory analysis of the ${\tau }^{-}\to K^{-}({\eta }^{(\prime )},K^0){\nu }_{\tau }$ decays
• Production and decay of polarized hyperon-antihyperon pairs
• Constraining beyond the Standard Model nucleon isovector charges
• First Measurement of the Absolute Branching Fraction of $\Lambda \to p{\mu }^{-}{\bar{\nu }}_{\mu }$
• Search for the hyperon semileptonic decay ${\Xi }^{-}\to {\Xi }^0{e}^{-}\overline{{\nu }_e}$
• Tension between $e^{+}{e}^{-}\to \eta {\pi }^{-}{\pi }^{+}$ and ${\tau }^{-}\to \eta {\pi }^{-}{\pi }^0{\nu }_{\tau }$ data and non-standard interactions
• Four-body Semileptonic Charm Decays $D\to P_1{P}_2{\ell }^{+}{\nu }_{\ell }$ Based on SU(3) Flavor Analysis
• Studying Two-body Nonleptonic Weak Decays of Hyperons with Topological Diagram Approach
• Semileptonic $\tau$ decays: powerful probes of non-standard charged current weak interactions
• Studying Radiative Baryon Decays with the SU(3) Flavor Symmetry
• On the EFT validity for Drell-Yan tails at the LHC
• Hyperon production in quasielastic ${\bar{\nu }}_{\tau }-$nucleon scattering
• A new angle on an old problem: Helicity approach to neutron beta decay in the Standard Model
• Workshop summary -- Kaons@CERN 2023
• Branching fraction measurement of the $\Lambda \to p{\mu }^{-}{\overline{\nu }}_{\mu }$ decay
• New Physics Searches at Kaon and Hyperon Factories