Experimental observation of optical rotation generated in vacuum by a magnetic field.
We report the experimental observation of a light polarization rotation in vacuum in the presence of a transverse magnetic field. Assuming that data distribution is Gaussian, the average measured rotation is (3.9 +/- 0.5) x 10(-12) rad/pass, at 5 T with 44 000 passes through a 1 m long magnet, with lambda = 1064 nm. The relevance of this result in terms of the existence of a light, neutral, spin-zero particle is discussed.
Zavattini
E
E
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste and Università di Trieste, Trieste, Italy.
Zavattini
G
G
Ruoso
G
G
Polacco
E
E
Milotti
E
E
Karuza
M
M
Gastaldi
U
U
Di Domenico
G
G
Della Valle
F
F
Cimino
R
R
Carusotto
S
S
Cantatore
G
G
Bregant
M
M