The value for the radius of this particle is the subject of intense debate after experiments pairing it with a muon gave a much-lower-than-expected value. The delta plus baryon, which has spin 3/2, is its high-energy equivalent. Grand unified theories that don't conserve baryon number symmetry allow this particle to decay into a neutral pion and positron, but attempts to observe this decay have only succeeded in setting the half-life to at least 
The value for the radius of this particle is the subject of intense debate after experiments pairing it with a muon gave a much-lower-than-expected value. The delta plus baryon, which has spin 3/2, is its high-energy equivalent. Grand unified theories that don't conserve baryon number symmetry allow this particle to decay into a neutral pion and positron, but attempts to observe this decay have only succeeded in setting the half-life to at least 10 to the (*) 34 years. A cycle named for these particles that doesn't require carbon, nitrogen, or oxygen as catalysts dominates in stars around 1 solar mass; that fusion cycle is named for a "chain" of these particles and produces helium. This baryon is composed of 2 up quarks and 1 down quark. For 10 points, name this nucleon with a positive charge.
The value for the radius of this particle is the subject of intense debate after experiments pairing it with a muon gave a much-lower-than-expected value.
protons [do NOT accept "hydrogen"]