Thursday, September 20, 2018, 16:00
WHGA Auditorium
Andras Laszlo, Wigner RCP (Budapest)
Abstract:
In a recent paper CQG35(2018)175003, a general relativistic (GR)
calculation was presented on the Earth's gravitational effect in a mixed
magnetic-electric frozen spin storage ring on the spin transport. It was
shown that GR causes a precession out of the orbital plane in a frozen
spin ring, i.e. a slow vertical polarization buildup will be present,
given that the initial beam polarization was longitudinal. The effect is
similar to an Electric Dipole Moment (EDM) signal. The rate of the
vertical polarization buildup is predicted to be -a*betagamma*g/c, where
g is the gravitational acceleration on the surface of the Earth, c is
speed of light, betagamma is the particle momentum over mass, and a is
its magnetic moment anomaly. It is seen that the effect increases
unboundedly with the Lorentz factor gamma. Moreover, is proportional to
the magnetic moment anomaly a. The talk shall mainly address the
experimental perspectives to detect this GR effect with a possible
prototype EDM ring.