Recent work (funded via an Elise Richter Fellowhip by the FWF) has focused on particles with inhomogeneously charged surface regions: The majority of the particle carries negative electric charge, but the polar regions on the top and at the bottom of the particle are positively charged. (sciencedaily.com)
This theory led to a surprising predictionthe equations that described the electron also described, and in fact required, the existence of another type of particle with exactly the same mass as the electron but with positive instead of negative electric charge. (scientificamerican.com)
The scientist tells us much, though much of it is still tentative, and we read of the positive or negative electric charge carried by different particles, and the manner of their operation within the atom because of this relationship. (faith.org.uk)