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Exclusive diffractive photon bremsstrahlung at high energies | | Piotr Lebiedowicz
; Antoni Szczurek
; | | Date: |
28 Jun 2013 | | Abstract: | We discuss the $p p o p p gamma$ reaction at the LHC. We consider
diffractive classical bremsstrahlung mechanisms including effects of non
point-like nature of protons. In addition, we take into account (vector
meson)-pomeron, photon-pion as well as photon-pomeron exchange processes for
the first time in the literature. The integrated diffractive bremsstrahlung
cross section ($E_{gamma}>100$ GeV) is only of the order of $mu$b. We try to
identify regions of the phase space where one of the mechanisms dominates. The
classical bremsstrahlung dominates at large forward/backward photon
pseudorapidities, close to the pseudorapidities of scattered protons. In
contrast, the photon-pomeron (pomeron-photon) mechanism dominates at
midrapidities but the related cross section is rather small. In comparison the
virtual-omega--rescattering mechanism contributes at smaller angles of photons
(larger photon rapidities). | | Source: | arXiv, 1306.6819 | | Services: | Forum | Review | PDF | Favorites | |
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