Charged Lepton Flavor Violation at the EIC

Abstract

We present a comprehensive analysis of the potential sensitivity of the Electron-Ion Collider (EIC) to charged lepton flavor violation (CLFV) in the channel $ep\to \tau X$, within the model-independent framework of the Standard Model Effective Field Theory (SMEFT). We compute the relevant cross sections to leading order in QCD and electroweak corrections and perform simulations of signal and SM background events in various $\tau$ decay channels, suggesting simple cuts to enhance the associated estimated efficiencies. To assess the discovery potential of the EIC in $\tau$-$e$ transitions, we study the sensitivity of other probes of this physics across a broad range of energy scales, from $pp\to e\tau X$ at the Large Hadron Collider to decays of $B$ mesons and $\tau$ leptons, such as $\tau \to e\gamma$, $\tau \to e{\ell }^{+}{\ell }^{-}$, and crucially the hadronic modes $\tau \to eY$ with $Y\in \{\pi ,K,\pi \pi ,K\pi ,...\}$. We find that electroweak dipole and four-fermion semi-leptonic operators involving light quarks are already strongly constrained by $\tau$ decays, while operators involving the $c$ and $b$ quarks present more promising discovery potential for the EIC. An analysis of three models of leptoquarks confirms the expectations based on the SMEFT results. We also identify future directions needed to maximize the reach of the EIC in CLFV searches: these include an optimization of the $\tau$ tagger in hadronic channels, an exploration of background suppression through tagging $b$ and $c$ jets in the final state, and a global fit by turning on all SMEFT couplings, which will likely reveal new discovery windows for the EIC.

108 pages, 25 beautiful figures, 27 tables, matches published version

References in corpus (13)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Flavour physics of leptons and dipole moments
• Low energy effects of neutrino masses
• New physics in the weak interaction of $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Form Factors in the radiative pion decay
• Lepton flavour violating semileptonic tau decays in constrained MSSM-seesaw scenarios
• The model-discriminating power of lepton flavor violating tau decays
• Lepton flavor violating quarkonium decays
• Novel patterns for vector mesons from the large-Nc limit
• Theoretical and experimental status of rare charm decays
• Rare semileptonic $B\to K(\pi )l_i^{-}{l}_j^{+}$ decay in vector leptoquark model
• Leptoquarks and Neutrino Masses at the LHC
• Improving the Hadron Physics of Non-Standard-Model Decays: Example Bounds on R-parity Violation

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