The τ-θ puzzle

Photon-photon polarization correlations as a tool for studying parity nonconservation in heliumlike uranium

“…Many later experiments in nuclear and high-energy physics confirmed parity violation in weak interactions and precisely recorded weak charge and other related parameters [4][5][6][7]. Although, with some initial controversies, the τ -γ puzzle was also solved by understanding that both τ and γ were two decay channels of the same parent particle, known today as the charged kaon K + [8,9]. In contrast to nuclear and high-energy physics, fewer experiments have been carried out in atomic physics to measure the properties of weak interaction.…”

Quark Structure of Hadrons and High Energy Collisions

“…Hence, it is natural to assume that SU(6) holds also for the production processes of secondary particles. This means that in the multiparticle production processes not only stable particles appear but also resonances, and the production probabilities of all hadron states belonging to one SU(3) multiplet are equal 4 . Hence, the probability of the hadron production within one SU(6) multiplet is proportional to the number of of spin states of these hadrons, i.e.…”

“…In this case we consider an incident quark q i which, joining a quark or an 4 There are some particles which do not to fit into this scheme; their properties seem to be due to the dynamics of the quark confinement [24]. Due to [25], there are two sorts of light quarks: constituent quarks with masses about 300 MeV and much lighter relativistic current quarks.…”

“…We are sure today that all the complexity of hadronic phenomena is due to the fact that hadrons are composite systems built up from a small number of "elementary" particles, quarks and gluons. Quarks as objects inside the hadrons appeared first in the "classical" models of constituent quarks ( [2]- [4]). The quark model gave a comprehensive tool for classifying the hadronic states.…”