Preequilibrium parton production following an ultrarelativistic nucleus– nucleus collision is studied in terms of the decay of a strong chromoelectric field which generates pairs through the Schwinger mechanism. Back-reaction of the partons with the field is included and a model transport equation containing a collision term is solved for the central rapidity region based on an approximation in...

Transverse momentum spectra of the reaction products from proton-proton and nucleus-nucleus collisions are discussed within the phenomenological frameworks of statistical phase-space and string fragmentation models. It will be shown that a string fragmentation model can accommodate all of the observations discussed here and consequently it is claimed that no conclusion about the thermal nature ...

Using the Green function method, binding effects on produced η-mesons in the two-stage reaction γ + A → N + η + (A − 1) → N + (πN) + (A − 2) are studied. The energy spectrum of the correlated πN pairs which arise from decays of η’s inside the nucleus is strongly affected by an attractive η-nucleus optical potential. Its resonant behavior gives a clear signal of formating intermediate η-mesic nu...

Preequilibrium parton production following an ultrarelativistic nucleus– nucleus collision is studied in terms of the decay of a strong chromoelectric field which generates pairs through the Schwinger mechanism. Back-reaction of the partons with the field is included and a model transport equation containing a collision term is solved for the central rapidity region based on an approximation in...

A recent experiment [{\bf Phys. Rev. Lett. 126,082301 (2021)}] used the $(e,e'p)$ reaction on $^{12}$C to search for effects of color transparency (the absence final state interactions). Color was said be ruled out. The ability observe depends a putative point-like-configuration (PLC), formed in high-momentum transfer coherent reaction, escape nucleus without expanding its size. We study expans...

The effective interaction between a nucleon and nucleus is one of the most important ingredients for reaction theories. Theoretical formulations were introduced early by Feshbach Watson, efforts deriving computing those ‘optical potentials’ in microscopic fashion have long tradition. However, only recently leading order term Watson multiple scattering approach could be calculated fully ab initi...

The new Atomki-V2 α-nucleus potential is applied to calculate astrophysical reaction rates NA〈σv〉 of intermediate mass and heavy target nuclei from iron (Z=26) up bismuth (Z=83). Overall, α-induced reactions are provided for 4359 nuclei, covering as well neutron-deficient extremely neutron-rich the proton neutron dripline. Contrary previous rate compilations, these calculations include all rele...

We study exclusive $\pi^+ \pi^-$ pair production near $\rho^0$ resonance peak in ultraperipheral heavy ion collisions. Pion can either be produced via two photon fusion process or from the decay of photon-nuclear reaction. At very low transverse momentum, electromagnetic and nuclear amplitudes become comparable. show that Coulomb interference amplitude gives rise to sizable $\cos \phi$ 3\phi$ a...

INTRODUCTIONDevelopment of the polymerase chain reaction (PCR) as a basic component of the molecular biology laboratory has occurred very rapidly from its inception in 1985. As PCR became more widely used, scientists rapidly learned more about it and, as a result, learned that PCR had its strong points and its deficiencies. Very quickly, PCR demonstrated its power to amplify very small amounts ...