New physics and tau $g-2$ using LHC heavy ion collisions

Abstract

The anomalous magnetic moment of the tau lepton $a_{\tau }=(g_{\tau }-2)/2$ strikingly evades measurement, but is highly sensitive to new physics such as compositeness or supersymmetry. We propose using ultraperipheral heavy ion collisions at the LHC to probe modified magnetic $\delta a_{\tau }$ and electric dipole moments $\delta d_{\tau }$. We introduce a suite of one electron/muon plus track(s) analyses, leveraging the exceptionally clean photon fusion $\gamma \gamma \to \tau \tau$ events to reconstruct both leptonic and hadronic tau decays sensitive to $\delta a_{\tau },\delta d_{\tau }$. Assuming 10% systematic uncertainties, the current 2 nb${}^{-1}$ lead-lead dataset could already provide constraints of $-0.0080<a_{\tau }<0.0046$ at 68% CL. This surpasses 15 year old lepton collider precision by a factor of three while opening novel avenues to new physics.

arXiv comment5 pages, 3 figures + bibliography and appendices

References in corpus (79)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• A Brief Introduction to PYTHIA 8.1
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• MadGraph 5 : Going Beyond
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Dimension-Six Terms in the Standard Model Lagrangian
• Measurement of the fine-structure constant as a test of the Standard Model
• Performance of the ATLAS Trigger System in 2015
• The muon $g-2$ and $\alpha (M_Z^2)$: a new data-based analysis
• Complete Tenth-Order QED Contribution to the Muon g-2
• (g-2)_mu and alpha(M_Z^2) re-evaluated using new precise data
• Measurement of the ratio of branching fractions $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• Muon reconstruction performance of the ATLAS detector in proton--proton collision data at $\sqrt{s}$=13 TeV
• New determination of the fine structure constant and test of the quantum electrodynamics
• A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to $\mathbf{\alpha }({\mathbf{m}}_{\mathbf{Z}}^2)$
• The Muon Anomalous Magnetic Moment: A Harbinger For "New Physics"
• Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant
• Evidence for light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC
• Cavity Control of a Single-Electron Quantum Cyclotron:\\Measuring the Electron Magnetic Moment
• Muon anomalous magnetic dipole moment in supersymmetric theories
• Searching for axion-like particles with ultra-peripheral heavy-ion collisions
• The SMEFTsim package, theory and tools
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• Electron reconstruction and identification in the ATLAS experiment using the 2015 and 2016 LHC proton-proton collision data at $\sqrt{s}$ = 13 TeV
• Evidence for light-by-light scattering and searches for axion-like particles in ultraperipheral PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Observing light-by-light scattering at the Large Hadron Collider
• Light-by-Light Scattering Constraint on Born-Infeld Theory
• Axion-like particles, lepton-flavor violation and a new explanation of $a_{\mu }$ and $a_e$
• Observation of light-by-light scattering in ultraperipheral Pb+Pb collisions with the ATLAS detector
• Theory of the tau lepton anomalous magnetic moment
• Anomalous quartic WWgamma gamma, ZZgamma gamma, and trilinear WWgamma couplings in two-photon processes at high luminosity at the LHC
• Search for the Electric Dipole Moment of the tau Lepton
• A Tale of Two Anomalies
• Muon (g-2) Technical Design Report
• Z' models for the LHCb and g-2 muon anomalies
• Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Tagging Two-Photon Production at the LHC
• The FP420 R&D Project: Higgs and New Physics with forward protons at the LHC
• Explaining electron and muon $g-2$ anomaly in SUSY without lepton-flavor mixings
• Exclusive LHC physics with heavy ions: SuperChic 3
• Minimal flavor-changing $Z^{\prime }$ models and muon $g-2$ after the $R_{K^{\ast }}$ measurement
• Evidence for exclusive gamma gamma to W+W- production and constraints on anomalous quartic gauge couplings in pp collisions at sqrt(s) = 7 and 8 TeV
• Search for exclusive or semi-exclusive photon pair production and observation of exclusive and semi-exclusive electron pair production in pp collisions at sqrt(s) = 7 TeV
• Searching for axion-like particles with proton tagging at the LHC
• Probing new physics in diphoton production with proton tagging at the Large Hadron Collider
• Electron g-2 with flavor violation in MSSM
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• Measurement of the exclusive $\gamma \gamma \to {\mu }^{+}{\mu }^{-}$ process in proton--proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Possibility of Determining $\tau$ Lepton Electromagnetic Moments in $\gamma \gamma \to {\tau }^{+}{\tau }^{-}$ Process at the CERN-LHC
• New physics searches with heavy-ion collisions at the LHC
• $\gamma \gamma$ Production of Non--Strongly Interacting SUSY Particles at Hadron Colliders
• Splitting Mass Spectra and Muon g-2 in Higgs-Anomaly Mediation
• $\tau$ dipole moments via radiative leptonic $\tau$ decays
• Detection of two-photon exclusive production of supersymmetric pairs at the LHC
• Search for the Electric Dipole Moment and anomalous magnetic moment of the tau lepton at tau factories
• Study of Higgs boson production and its b-bbar decay in gamma-gamma processes in proton-nucleus collisions at the LHC
• LHC Searches for Dark Matter in Compressed Mass Scenarios: Challenges in the Forward Proton Mode
• Neutralinos and Sleptons at the LHC in Light of Muon $(g-2{)}_{\mu }$
• Lepton Flavour Violating Leptonic/Semileptonic Decays of Charged Leptons in the Minimal Supersymmetric Standard Model
• A note on Majorana neutrinos, leptonic CKM and electron electric dipole moment
• A Novel Approach to Fine-Tuned Supersymmetric Standard Models -- Case of Non-Universal Higgs Masses model
• Reconciling dark matter, $R_{K^{(\ast )}}$ anomalies and $(g-2{)}_{\mu }$ in an $L_{\mu }-L_{\tau }$ scenario
• Probe of electromagnetic moments of the tau lepton in gamma-gamma collisions at the CLIC
• Novel method for the direct measurement of the tau lepton dipole moments
• Photon collider search strategy for sleptons and dark matter at the LHC
• Feasibility of tau lepton electromagnetic dipole moments measurement using bent crystal at the LHC
• High Energy Two-Photon Interactions at the LHC
• $H\to {\tau }^{+}{\tau }^{-}\gamma$ as a Probe of the $\tau$ Magnetic Dipole Moment
• Model-independent bounds probing on the electromagnetic dipole moments of the $\tau$-lepton at the CLIC
• Towards a determination of the tau lepton dipole moments
• Peccei-Quinn Symmetry and Nucleon Decay in Renormalizable SUSY SO(10)
• Constraining $\tau$-lepton dipole moments and gluon couplings at the LHC
• Measuring the masses of a pair of semi-invisibly decaying particles in central exclusive production with forward proton tagging
• Search for the electromagnetic moments of the $\tau$ lepton in photon-photon collisions at the LHeC and the FCC-he
• High energy photon interactions at the LHC
• Feasibility at the LHC, FCC-he and CLIC for sensitivity estimates on anomalous $\tau$-lepton couplings
• A New Approach for Measuring the Muon Anomalous Magnetic Moment and Electric Dipole Moment

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• Observation of the $\gamma \gamma \to \tau \tau$ process in Pb+Pb collisions and constraints on the $\tau$-lepton anomalous magnetic moment with the ATLAS detector
• Towards testing the magnetic moment of the tau at one part per million
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• Report on Progress in Physics: Observation of the Breit-Wheeler Process and Vacuum Birefringence in Heavy-Ion Collisions
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• Strategy to measure tau $g-2$ via photon fusion in LHC proton collisions
• Tau $g-2$ at $e^{-}{e}^{+}$ colliders with momentum dependent form factor
• Light new physics and the $\tau$ lepton dipole moments: prospects at Belle II
• Extended thermal cycling of ATLAS ITk strip modules with and without stress mitigating interposers
• Polarized tau decay and CP violation in ultraperipheral heavy-ion collisions
• Feasibility of tau g-2 measurements in ultra-peripheral collisions of heavy ions
• Probing the Tau Anomalous Magnetic Moment at Colliders: From Ultra-Peripheral Collisions to the Precision Frontier
• Upcgen: a Monte Carlo simulation program for dilepton pair production in ultra-peripheral collisions of heavy ions
• Linearly Polarized Photon Fusion as a Precision Probe of the Tau Lepton Dipole Moments at Lepton Colliders