Diphoton signals in theories with large extra dimensions to NLO QCD at hadron colliders

Details Diphoton signals in theories with large extra dimensions to NLO QCD at hadron colliders Diphoton signals in theories with large extra dimensions to NLO QCD at hadron colliders

2008-11-11

arxiv.org/abs/0811.1670v2

Phys.Lett.B672:45-50,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 5 figures. To appear in PLB

Scientific paper

10.1016/j.physletb.2009.01.002

We present a full next-to-leading order (NLO) QCD corrections to diphoton production at the hadron colliders in both standard model and ADD model. The invariant mass and rapidity distributions of the diphotons are obtained using a semi-analytical two cut-off phase space slicing method which allows for a successful numerical implementation of various kinematical cuts used in the experiments. The fragmentation photons are systematically removed using smooth-cone-isolation cuts on the photons. The NLO QCD corrections not only stabilise the perturbative predictions but also enhance the production cross section significantly.

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