Some Properties of a Transient New Coherent Condition of Matter Formed in High--Energy Hadronic Collisions

摘要

We investigate the dynamical possibility for the formation of a transient newcoherent condition of matter in high--energy hadronic collisions. The coherentbosonic amplitude is characterized by a non--zero momentum and is sustained by$P $--wave interactions of quasi--pions in a dense fermionic medium. We makequantitative estimates of several essential properties: the condensate momentumand the fermionic density, the size of the coherent amplitude and the negativeenergy density contributed by the condensate, a characteristic proper time forthe system to exist prior to breakdown into a few pions, and a characteristicextension of the system over the plane perpendicular to the collision axis.These quantities then allow us to make definite estimates of new signals: a fewpions with anomalously small transverse momenta $\leq 50 $ MeV/c; and apossible anomalous bremsstrahlung of very soft photons with characteristictransverse momenta as low as about 4 MeV/c.