We have conducted a Coulomb's-law experiment at 1.36 K, in a search for low-temperature phase-transition effects. Our null result establishes that the photon at 1.36 K has a mass of less than (1.5 1.4)×10-42 g.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)