Vector Bremsstrahlung by Ultrarelativistic Collisions in Higher Dimensionsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
Аннотация:A classical computation of vector bremsstrahlung in ultrarelativistic
gravitational-force collisions of massive point particles is presented in an arbitrary number
d of extra dimensions. Our method adapts the post-linear formalism of General Relativity
to the multidimensional case. The total emitted energy, as well as its angular and frequency
distribution and characteristic values, are discussed in detail.
The contribution of the low frequency part of the radiation (soft photons) to the total
radiated energy is shown to be negligible for all values of d. The domain of validity of
the classical result is discussed. The result is analyzed from the viewpoint of the deWitt-Brehme-Hobbs equation (and corresponding equations in higher dimensions). The different frequency domains and their competition mentioned above, may be explained as coming from different terms in this equation. Thus the whole emission process may be naturally split in two sub-processes with drastically different spectral and temporal characteristics.