Classical ultrarelativistic bremsstrahlung in extra dimensionsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The emitted energy and the cross-section of classical scalar bremsstrahlung in massive particle collisions in D = 4 + d-dimensional Minkowski space MD as well as in the brane world M(4) x T(d) is computed to leading ultra-relativistic order. The particles are taken to interact in the first case via the exchange of a bulk massless scalar field Phi and in the second with an additional massless scalar phi confined together with the particles on the brane. Energy is emitted as Phi radiation in the bulk and/or phi radiation on the brane. In contrast to the quantum Born approximation, the classical result is unambiguous and valid in a kinematical region which is also specified. For D = 4 the results are in agreement with corresponding expressions in classical electrodynamics.