Conveners
Fundamental Symmetries and and Spin Physics Beyond the Standard Model: Chair: Shinsuke Kawasaki
- Hanjie Liu (University of Massachusetts)
- Tsutomu Mibe (IPNS/KEK)
- Shinsuke Kawasaki (KEK)
- Hiroki Nagahama (CNS, The University of Tokyo)
Fundamental Symmetries and and Spin Physics Beyond the Standard Model: Chair: Shinsuke Kawasaki
- Hiroki Nagahama (CNS, The University of Tokyo)
- Tsutomu Mibe (IPNS/KEK)
- Shinsuke Kawasaki (KEK)
- Hanjie Liu (University of Massachusetts)
Fundamental Symmetries and and Spin Physics Beyond the Standard Model: Chair: Hanjie Liu
- Hanjie Liu (University of Massachusetts)
- Hiroki Nagahama (CNS, The University of Tokyo)
- Tsutomu Mibe (IPNS/KEK)
- Shinsuke Kawasaki (KEK)
Fundamental Symmetries and and Spin Physics Beyond the Standard Model: Chair: Hanjie Liu
- Shinsuke Kawasaki (KEK)
- Tsutomu Mibe (IPNS/KEK)
- Hiroki Nagahama (CNS, The University of Tokyo)
- Hanjie Liu (University of Massachusetts)
The Jagiellonian PET (J-PET) detector is the only device which enables estimation of positronium spin axis together with determination of polarization of photons from positronium annihilation on the event-by-event basis. This allows to test angular correlations in the annihilations of the lightest leptonic bound system and explore a new class of discrete symmetry odd operators that were not...
Nonlinear field model of extremal space-time film is considered [1-3]. Its space-localized solution in toroidal coordinates with periodic dependence on time is investigated. In particular, we consider the field configuration having a form of the twisted lightlike soliton moving along the singular ring of the coordinate system. The solutions in the form of twisted lightlike solitons was...
The International Linear Collider has the opportunity to discover dark matter particles in the monophoton signature e+e- -> gamma +(missing). The sensitivity to new physics in this channel depends crucially on the control and correct estimation of backgrounds. This talk will explain how beam polarization can be used at the ILC to improve the reach of this search.
One of the major problems of modern particle physics is the inability of the Standard Model (SM) of Particle Physics to explain the matter-antimatter asymmetry in the Universe. Therefore, the pursuit of physics beyond the SM is required and one of the necessary conditions for the appearance of the matter-antimatter asymmetry is the violation of the CP symmetry. Permanent electric dipole...
We propose an experiment to search for the permanent electric dipole moment (EDM) of the muon at the Paul Scherrer Institute (PSI), Switzerland, by employing the frozen-spin technique with a potential sensitivity of $6\times10^{-23}$ $e\!\cdot\!\mathrm{cm}$ [1]. A muon EDM would violate CP symmetry and lepton flavor universality which makes the search an excellent test for physics beyond the...
The searches for permanent Electric Dipole Moments (EDMs) of elementary
particles provide a powerful tool to probe physics beyond the standard model
(SM). This is particularly useful to investigate the CP-violation mechanisms
that can explain the matter-antimatter asymmetry in the universe.
Conducting such searches in storage rings requires unprecedented understand-
ing of beam and spin...
The existence of the permanent Electric Dipole Moment (EDM) implies the time reversal symmetry violation. This violation directly means CP violation by the CPT theorem, and it would be expected to explain the observed matter-antimatter asymmetry. The electron EDM, which is the possible signal of the T-violation predicted by the Standard Model (SM) is too small to be measured with current...
In the anomalous magnetic moment of muons (muon g−2), there was a discrepancy of more than 3σ between the Standard Model prediction and the experimental value measured with an accuracy of 0.54 ppm by Brookhaven National Laboratory (BNL) E821 experiment, and it has long been argued that this might be a sign of new physics beyond the Standard Model. Recently, Fermilab's experimental group...
Rapid advances in searches for the electron EDM have recently been achieved using paramagnetic molecules, with an improvement in sensitivity by more than 100-fold over the past decade alone [1]. In our recent paper [2], we have identified novel mechanisms for the generation of EDMs in paramagnetic atoms and molecules via hadronic sources of CP violation. If the source of CP violation...
The Weinberg operator (chromo-electric dipole moment of gluon) is a CP violating quantity generated in many candidates of new physics beyond the standard model, and it contributes to observables such as the electric dipole moments (EDM) of the neutron, nuclei and atoms.
In this presentation, we review the present understanding of the Weinberg operator.
The precision extraction of the weak mixing angle at low momentum transfer can significantly constrain extensions to the Standard Model. One such measurement will be undertaken by the MOLLER collaboration starting in 2025. Using longitudinally polarized electrons scattering from unpolarized electrons in a liquid hydrogen target the experiment will be able to measure the approximately 34 parts...
Experimental studies of hadronic CP-violation rely on theoretical calculations of the hadronic matrix elements of higher-dimensional QCD operators representing the effects of the CP-violating short-distance dynamics at the hadronic scale. We report about a recent calculation of the spin-dependent nucleon matrix element of Weinberg's dimension-6 CP-odd gluon operator $f^{abc} (\tilde...
I point out the connection between the matrix element of the CP-violating Weinberg operator and certain higher-twist corrections in polarized DIS. Based on this observation I estimate the induced nucleon EDM.
We will present a new design of highly specialized small storage rings for low energy polarized electron beams. The new design is based on the transparent spin methodology that cancels the spin precession due to the magnetic dipole moment at any energy while allowing for spin precession induced by the fundamental physics of interest to accumulate. The buildup of the vertical component of beam...
