The measurement of the Higgs quartic coupling modifier between a boson pair and vector pair, ?2V, is expected to be achieved from vector-boson fusion (VBF) production pair. However, this process involves another unmeasured parameter, trilinear self-coupling ??. A sensitivity analysis should target both parameters. Since LHC cannot avoid gluon pollution, which becomes severe for non-SM ??, an el...

Using the strong electromagnetic fields in peripheral heavy ion collisions gives rise to a number of interesting possibilities of applications in both photon-photon and photon-hadron physics. We look at the theoretical foundations of the equivalent photon approximation and the specific problems in the heavy ion case. The interesting physics processes that can be studied in this way are outlined...

Electron-positron pair production via real and virtual photons is signi cant to the design of linear colliders, especially in the deep quantum regime (i.e., beamstrahlung parameter >> 1). In this regime, pair production via a virtual photon (the trident process) can become comparable in rate to pair production via a real beamstrahlung photon. We derive characteristics of the e+epairs produced v...

A probability of electron-positron pair production by photons in strong nonuniform fields is derived by applying a model trajectory method in the frame of a semiclassical approach. In addition to the well known invariant field parameter chi, a new invariant parameter nu is introduced to characterize the nonuniformity of the field. For nu>>1, the obtained expression is reduced to the uniform-fie...