Quark and gluon spin-2 form factors to two-loops in QCD

Mahakhud, Maguni; Mathews, Prakash; Mazzitelli, Javier; Ravindran, V.

doi:10.1007/jhep02(2014)035

Cited by 17 publications

(21 citation statements)

References 72 publications

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“…The one and two loop results completely agree with [23] and the three loop ones are new. where C A = N , C F = (N 2 − 1)/2N and n f is the number of active quark flavors.…”

Section: Resultssupporting

confidence: 73%

Spin-2 form factors at three loop in QCD

Ahmed

Das

Mathews

et al. 2015

J. High Energ. Phys.

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Spin-2 fields are often candidates in physics beyond the Standard Model namely the models with extra-dimensions where spin-2 Kaluza-Klein gravitons couple to the fields of the Standard Model. Also, in the context of Higgs searches, spin-2 fields have been studied as an alternative to the scalar Higgs boson. In this article, we present the complete three loop QCD radiative corrections to the spin-2 quark-antiquark and spin-2 gluon-gluon form factors in SU(N) gauge theory with n f light flavors. These form factors contribute to both quark-antiquark and gluon-gluon initiated processes involving spin-2 particle in the hadronic reactions at the LHC. We have studied the structure of infrared singularities in these form factors up to three loop level using Sudakov integro-differential equation and found that the anomalous dimensions originating from soft and collinear regions of the loop integrals coincide with those of the electroweak vector boson and Higgs form factors confirming the universality of the infrared singularities in QCD amplitudes.

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“…The one and two loop results completely agree with [23] and the three loop ones are new. where C A = N , C F = (N 2 − 1)/2N and n f is the number of active quark flavors.…”

Section: Resultssupporting

confidence: 73%

Spin-2 form factors at three loop in QCD

Ahmed

Das

Mathews

et al. 2015

J. High Energ. Phys.

Self Cite

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“…[29]. Using those results, the complete two-loop corrections for single graviton production and di-lepton production mediated by a graviton can be obtained, for both gluon-gluon and quark-antiquark partonic subprocesses.…”

Section: Partonic Cross Sectionmentioning

confidence: 99%

Next-to-next-to-leading order QCD corrections in models of TeV-scale gravity

Mahakhud

Mathews

Mazzitelli

et al. 2014

J. High Energ. Phys.

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Abstract: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 contribution 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 √ s H = 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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“…The higher-order correction involves pure virtual contributions, pure real corrections and appropriate interference terms at each order. For the spin-2 case, the quark and gluon form factors have been calculated at two-loop level [26] and at three-loop level [27] in peturbative QCD (pQCD). An attempt to consider the soft and collinear contribution at NNLO accuracy was made [28] in the context of spin-2.…”

Section: Introductionmentioning

confidence: 99%

The two-loop QCD correction to massive spin-2 resonance $$ \rightarrow q \bar{q} g $$ → q q ¯ g

et al. 2016

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The two-loop QCD correction to massive spin-2 graviton decaying to q +q + g is presented considering a generic universal spin-2 coupling to the SM through the conserved energy-momentum tensor. Such a massive spin-2 particle can arise in extra-dimensional models. The ultraviolet and infrared structure of the QCD amplitudes are studied. In dimensional regularization, the infrared pole structure is in agreement with Catani's proposal, confirming the universal factorization property of QCD amplitudes, even with the spin-2 tensorial coupling.

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Quark and gluon spin-2 form factors to two-loops in QCD

Cited by 17 publications

References 72 publications

Spin-2 form factors at three loop in QCD

Spin-2 form factors at three loop in QCD

Next-to-next-to-leading order QCD corrections in models of TeV-scale gravity

The two-loop QCD correction to massive spin-2 resonance $$ \rightarrow q \bar{q} g $$ → q q ¯ g

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