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Novel method for the direct measurement of the tau lepton dipole moments

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arxiv 1901.04003 v3 pith:6ATWDHZP submitted 2019-01-13 hep-ex hep-ph

Novel method for the direct measurement of the tau lepton dipole moments

J. Fu , M.A. Giorgi , L. Henry , D. Marangotto , F. Martinez Vidal , A. Merli , N. Neri , J. Ruiz Vidal This is my paper
classification hep-ex hep-ph
keywords dipoleleptonmomentscrystaldirectelectricexperimentalleptons
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A novel method for the direct measurement of the elusive magnetic and electric dipole moments of the tau lepton is presented. The experimental approach relies on the production of tau+ leptons from Ds+ -> tau+ nu_tau decays, originated in fixed-target collisions at the LHC. A sample of polarized tau+ leptons is kinematically selected and subsequently channeled in a bent crystal. The magnetic and electric dipole moments of the tau+ lepton are measured by determining the rotation of the spin-polarization vector induced by the intense electromagnetic field between crystal atomic planes. The experimental technique is discussed along with the expected sensitivities.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Differential measurements of $\gamma\gamma\to\tau\tau$ and constraints on $\tau$-lepton electromagnetic moments in Pb+Pb collisions at $\sqrt{s_{_\text{NN}}} = 5.02$ TeV with ATLAS

    nucl-ex 2026-05 unverdicted novelty 7.0

    First differential cross-sections for γγ→ττ in Pb+Pb collisions yield 95% CL intervals -0.057 < a_τ < 0.035 and |d_τ| < 2.7×10^{-16} e cm.

  2. Light new physics and the $\tau$ lepton dipole moments: prospects at Belle II

    hep-ph 2025-10 unverdicted novelty 7.0

    Light new particles generate asymmetries in e+e- to tau+tau- that allow model-dependent constraints on tau dipole moments, including non-zero effects without electron polarization via imaginary parts.

  3. Light new physics and the $\tau$ lepton dipole moments

    hep-ph 2025-11 unverdicted novelty 6.0

    This work provides a comprehensive analysis of light new physics contributions to tau lepton dipole moments, detailing interpretations of asymmetry measurements for spin-0 and spin-1 bosons, their decoupling to the EF...