Some properties of a transient new coherent condition of matter formed in high-energy hadronic collisions

Abstract

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

Study of the dependence of direct soft photon production on the jet characteristics in hadronic Z 0 decays

“…Turning to the models exploiting collective behavior of radiation sources (let us call them collective models for brevity), it is interesting to note that in Barshay's model of a transient new coherent condition of matter [65][66][67][68], proposed for the explanation of the anomalous soft photon production in hadronic beam experiments [9][10][11], the soft pho-ton radiation enhancement appears also due to an explicitly non-linear feature of the model, but the radiation itself is coherent and the enhancement occurs due to a constructive interference of radiation sources [65].…”

A transient new coherent condition of matter: the signal for new physics in hadronic diffractive scattering

“…In the system, the energies can be very small on the usual scale of m π , down to E γ of the order of 1/T ≃ 6 MeV with a bremsstrahlung-like spectrum [29], [28]. We have estimated [28] that the level of anomalous emission can reach several times the level of the bremsstrahlung from incoming and outgoing charged hadrons. Since the latter is at the level [12] of about 2 %, this corresponds to a soft photon occurring in of the order of 10 % of inelastic collisions.…”

“…If charged currents exist during the evolution of the coherent system, then it has been shown that soft photons will be emitted [29]. In the system, the energies can be very small on the usual scale of m π , down to E γ of the order of 1/T ≃ 6 MeV with a bremsstrahlung-like spectrum [29], [28]. We have estimated [28] that the level of anomalous emission can reach several times the level of the bremsstrahlung from incoming and outgoing charged hadrons.…”

“…The parameters y 0 , R b and T characterize the essential physical aspects of the coherent system, and are necessary [F7]. We have investigated a definite model patterned after studies of pion condensation in a nuclear medium [27], but involving quasi-pions (correlated quark-antiquark pairs with small (mass) 2 ) propagating in a dense medium of "dressing" quarks and antiquarks, looking for the onset of a coherent condition [28] that contributes a negative energy density in the medium.…”

“…This allows for the possibility of cancellation of the positive, kinetic and (mass) 2 terms by the attractive momentum-dependent interaction [27]. For orientation we have attempted to roughly estimate [28], in such a coherent system, the parameters relevant for the anomalous amplitude in eq. ( 4).…”