A bstract We study capability of the ILC beam dump experiment to search for new physics, comparing performance electron and positron dumps. The dark photon, axion-like particles, light scalar bosons are considered as physics scenarios, where all important production mechanisms included: electron-positron pair-annihilation, Primakoff process, bremsstrahlung productions. find that has higher sens...

The theory of direct electron-positron pair production in the collision of heavy ions i s formulated in the framework of the quasimolecular model. The pair production process acquires a collective nature for (Z1 +Z,)cu; 1 and can be understood a s the shakeoff of the strong vacuum polarization cloud formed in the quasimolecule. The total Cross section is, e .g., 76 l b for Pb + Pb at Coulomb ba...

At very high energies, the bremsstrahlung and pair production cross sections exhibit complex behavior due to the material in which the interactions occur. The cross sections in dense media can be dramatically different than for isolated atoms. This writeup discusses these in-medium effects, emphasizing how the cross section has different energy and target density dependencies in different regim...

The high energy expansion for extended targets developed previously is used to describe to the problem of electron pair production by photons, a problem of interest in linear collider design. The treatment is valid throughout the range of possible parameters, from the classical regime to the extreme quantum domain. The differences between this process and pair production in a constant external ...

We study QCD correction to the pair production of colored scalar particles in electron-positron annihilation with an emphasis on gluon emission in the final state. We discuss the usefulness of working in a “quasi-two-body” frame and present the helicity amplitudes for the process. We compare the final state configuration with fermion pair production and find that the three-jet fraction for the ...

We have calculated the full one-loop electroweak (EW) and QCD corrections to the third generation scalar-fermion pair production processes ee → γγ → f̃i ̄̃ fi(f = t, b, τ) at an electron-positron linear collider(LC) in the minimal supersymmetric standard model (MSSM). We analyze the dependence of the radiative corrections on the parameters such as the colliding energy √ ŝ and the SUSY fundamental ...

The present work theoretically investigates the probability of generation entangled electron-photon pair in high-energy Compton scattering unpolarized electrons and photons due to scattering-channel-exchange mechanism. study suggests that with nearly equal energy order MeV at cross-channel can create up-spin electron RCP photon or down-spin LCP photon. entanglement is quite strong exhibiting ju...