Test of the weak equivalence principle for neutrinos and photons

Details Test of the weak equivalence principle for neutrinos and photons Test of the weak equivalence principle for neutrinos and photons

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvl..60..176k&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 60, Jan. 18, 1988, p. 176, 177. NSERC-supported research.

Physics

66

Neutrinos, Photons, Supernova 1987A, Time Lag, Elementary Particles, Magellanic Clouds

Scientific paper

The observation of a neutrino burst within 3 h of the associated optical burst from supernova 1987A in the Large Magellanic Cloud provides a new test of the weak equivalence principle, by demonstrating that neutrinos and photons follow the same trajectories in the grvitational field of the galaxy. The accuracy of the test depends on the poorly known mass distribution in the outer parts of the galaxy, but is at least 0.5 percent and probably much better. This result provides direct evidence that the Shapiro geodesic time delay is identical, to this accuracy, for different elementary particles, independent of spin and internal quantum numbers.

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