Pions and Kaons May be Vector Particles with Spin 0

Theoretically, there is a niche for vector particles to have spin zero [1]. Evidence that pions and kaons carry directional information was observed in many experiments during the 1950's and 1960's. These results can be explained if the pion and kaon are a very simple type of vector particle with spin zero. For the neutral pion to be a vector particle and decay into two photons, the two photons must be in a vector state that is asymmetric under the interchange of the two photons. This is possible if the photon is a composite particle. It has been shown [2] that most properties of a composite photon are the same or very similar to those of an elementary photon. We will discuss two 1950's type experiments that can determine if the pion is a vector particle.

[1] W. A. Perkins, "Massive vector particles with spin zero," EPL (Europhysics Letters) 114 (2016) 41002.

[2] W. A. Perkins, "Composite Photon Theory Versus Elementary Photon Theory", Journal of  Modern Physics Vol. 5, 2089 (2014).