Artículo
Next-to-next-to-leading order QCD corrections in models of TeV-scale gravity
de Florian, Daniel Enrique
; Mahakhud, Maguni; Mathews, Prakash; Mazzitelli, Javier Sebastián
; Ravindran, V.
Fecha de publicación:
04/2014
Editorial:
Springer
Revista:
Journal Of High Energy Physics
ISSN:
1029-8479
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We compute the next-to-next-to-leading order QCD corrections to the graviton production in models of TeV-scale gravity, within the soft-virtual approximation. For the Arkani-Hamed, Dimopoulos and Dvali (ADD) model we evaluate the contribu-tion to the Drell-Yan cross section, and we present distributions for the di-lepton invariant mass at the LHC with a center-of-mass energy sH−−−√sH = 14 TeV. We find a large K factor (K ≃ 1.8) for large values of invariant mass, which is the region where the ADD graviton contribution dominates the cross section. The increase in the cross section with respect to the previous order result is larger than 10% in the same invariant mass region. We also observe a substantial reduction in the scale uncertainty. For the Randall-Sundrum (RS) model we computed the total single graviton production cross section at the LHC. We find an increase between 10% and 13% with respect to the next-to-leading order prediction, depending on the model parameters. We provide an analytic expression for the NNLO K factor as a function of the lightest RS graviton mass.
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Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
de Florian, Daniel Enrique; Mahakhud, Maguni; Mathews, Prakash; Mazzitelli, Javier Sebastián; Ravindran, V.; Next-to-next-to-leading order QCD corrections in models of TeV-scale gravity; Springer; Journal Of High Energy Physics; 2014; 28; 4-2014; 1-18
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