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.
Aiharaet al., (2024), arXiv:2406.19421 [hep-ex]
7 Pith papers cite this work. Polarity classification is still indexing.
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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 EFT limit, and a case study of a tauphilic vector boson at Belle II.
Z-boson exchange contributes ~3e-6 to the relevant asymmetries while four-fermion operators can reach ~1e-5 times Wilson coefficients, with loop insertions offering an additional path to a_tau without beam polarization.
Future lepton colliders can improve existing constraints on the tau lepton's dipole moments by several orders of magnitude through complementary channels.
Design and development overview of OBELIX MAPS-based vertex detector with two self-supported layers and three supported layers plus aluminum flex circuits for Belle II upgrade.
In the B-LSSM the traditional mu-term dominates d_mu and d_tau while B-LSSM-specific CPV parameters also contribute, placing d_mu inside projected Phase-II sensitivity over substantial parameter space and allowing |d_tau| up to 10^{-21} e cm.
Belle II proposes a DMAPS-based vertex detector upgrade with the OBELIX chip targeting 6e35 cm^-2 s^-1 luminosity, 120 MHz/cm2 hit rates, and radiation tolerance to 5e14 neq/cm2.
citing papers explorer
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Light new physics and the $\tau$ lepton dipole moments: prospects at Belle II
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.
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Light new physics and the $\tau$ lepton dipole moments
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 EFT limit, and a case study of a tauphilic vector boson at Belle II.
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Four-fermion operators, $Z$-boson exchange, and $\tau$ lepton dipole moments
Z-boson exchange contributes ~3e-6 to the relevant asymmetries while four-fermion operators can reach ~1e-5 times Wilson coefficients, with loop insertions offering an additional path to a_tau without beam polarization.
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Probing $\tau$ lepton dipole moments at future Lepton Colliders
Future lepton colliders can improve existing constraints on the tau lepton's dipole moments by several orders of magnitude through complementary channels.
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Development for the Belle II vertex detector upgrade with depleted monolithic active pixel sensors
Design and development overview of OBELIX MAPS-based vertex detector with two self-supported layers and three supported layers plus aluminum flex circuits for Belle II upgrade.
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The Muon and Tau Electric Dipole Moments in the B-L Supersymmetric Standard Model
In the B-LSSM the traditional mu-term dominates d_mu and d_tau while B-LSSM-specific CPV parameters also contribute, placing d_mu inside projected Phase-II sensitivity over substantial parameter space and allowing |d_tau| up to 10^{-21} e cm.
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Upgrade of the Belle II Vertex Detector with Depleted Monolithic CMOS Active Pixel Sensors
Belle II proposes a DMAPS-based vertex detector upgrade with the OBELIX chip targeting 6e35 cm^-2 s^-1 luminosity, 120 MHz/cm2 hit rates, and radiation tolerance to 5e14 neq/cm2.