Spallation usually refers to the production of these particles, and they have a lifetime of approximately 15 minutes.
An upper value of 10 to the -28 was set for the EDM of this particle, though a non-zero electric dipole moment for it would violate PT-symmetry. The "fast" forms of these particles are converted into their "thermal" forms by a namesake moderator. (*) Spallation usually refers to the production of these particles, and they have a lifetime of approximately 15 minutes. Two down quarks and one up quark compose this baryon that was discovered by James Chadwick in 1932. Isotopes differ in their number of these particles. For 10 points, name these chargeless particles found in atomic nuclei along with protons.
An upper value of 10 to the -28 was set for the EDM of this particle, though a non-zero electric dipole moment for it would violate PT-symmetry.
neutrons (do not accept “neutrinos”)