This diagram shows a photon (wavy line) tunneling through a barrier mediated by a minicharged particle-antiparticle loop. The possibility of tunneling is enhanced by an applied magnetic field.
Image credit: Döbrich, et al. ©2012 American Physical Society

‘Tunneling of the third kind’ experiment could search for new physics

October 3, 2012 by Lisa Zyga

(Phys.org)—In an attempt to solve some of the observational puzzles in physics, theorists have proposed a number of new physics models. Several of these models suggest the existence of extremely weakly interacting lightweight particles with tiny fractional electric charges called minicharged particles (MCPs). Constraining the masses of MCPs could help theorists refine their models, but so far it has been very difficult to detect MCPs. Now in a new study, physicists in Germany have proposed a new search for MCPs based on a new tunneling mechanism called “tunneling of the third kind,” which could prove very useful in the search for new physics.

Read more: 'Tunneling of the third kind' experiment could search for new physics — Phys.org.

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