NNLO QCD corrections to the Drell–Yan cross section in models of TeV-scale gravity View Full Text


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Article Info

DATE

2017-01-10

AUTHORS

Taushif Ahmed, Pulak Banerjee, Prasanna K. Dhani, M. C. Kumar, Prakash Mathews, Narayan Rana, V. Ravindran

ABSTRACT

The first results on the complete next-to-next-to-leading order (NNLO) Quantum Chromodynamic (QCD) corrections to the production of di-leptons at hadron colliders in large extra dimension models with spin-2 particles are reported in this article. In particular, we have computed these corrections to the invariant mass distribution of the di-leptons taking into account all the partonic sub-processes that contribute at NNLO. In these models, spin-2 particles couple through the energy-momentum tensor of the Standard Model with the universal coupling strength. The tensorial nature of the interaction and the presence of both quark annihilation and gluon fusion channels at the Born level make it challenging computationally and interesting phenomenologically. We have demonstrated numerically the importance of our results at Large Hadron Collider energies. The two-loop corrections contribute an additional 10% to the total cross section. We find that the QCD corrections are not only large but also important to make the predictions stable under renormalisation and factorisation scale variations, providing an opportunity to stringently constrain the parameters of the models with a spin-2 particle. More... »

PAGES

22

References to SciGraph publications

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  • 2014-04-07. Next-to-next-to-leading order QCD corrections in models of TeV-scale gravity in JOURNAL OF HIGH ENERGY PHYSICS
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  • 2015-04-08. Parton distributions for the LHC run II in JOURNAL OF HIGH ENERGY PHYSICS
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  • 2013-11-06. A framework for Higgs characterisation in JOURNAL OF HIGH ENERGY PHYSICS
  • 2012-12-19. Diphoton production in the ADD model to NLO + parton shower accuracy at the LHC in JOURNAL OF HIGH ENERGY PHYSICS
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  • 2015-05-09. Parton distributions in the LHC era: MMHT 2014 PDFs in EUROPEAN PHYSICAL JOURNAL C
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    http://scigraph.springernature.com/pub.10.1140/epjc/s10052-016-4587-6

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    27 schema:description The first results on the complete next-to-next-to-leading order (NNLO) Quantum Chromodynamic (QCD) corrections to the production of di-leptons at hadron colliders in large extra dimension models with spin-2 particles are reported in this article. In particular, we have computed these corrections to the invariant mass distribution of the di-leptons taking into account all the partonic sub-processes that contribute at NNLO. In these models, spin-2 particles couple through the energy-momentum tensor of the Standard Model with the universal coupling strength. The tensorial nature of the interaction and the presence of both quark annihilation and gluon fusion channels at the Born level make it challenging computationally and interesting phenomenologically. We have demonstrated numerically the importance of our results at Large Hadron Collider energies. The two-loop corrections contribute an additional 10% to the total cross section. We find that the QCD corrections are not only large but also important to make the predictions stable under renormalisation and factorisation scale variations, providing an opportunity to stringently constrain the parameters of the models with a spin-2 particle.
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    36 Drell-Yan cross section
    37 Hadron Collider
    38 Hadron Collider (LHC) energies
    39 Large Hadron Collider (LHC) energies
    40 NNLO
    41 NNLO QCD corrections
    42 QCD corrections
    43 TeV-scale gravity
    44 account
    45 annihilation
    46 article
    47 channels
    48 collider energies
    49 correction
    50 couples
    51 coupling strength
    52 cross sections
    53 dimension model
    54 distribution
    55 energy
    56 energy-momentum tensor
    57 extra dimension model
    58 factorisation scale variations
    59 first results
    60 fusion channel
    61 gluon fusion channel
    62 gravity
    63 importance
    64 interaction
    65 invariant mass distribution
    66 large extra dimension model
    67 levels
    68 mass distribution
    69 model
    70 nature
    71 opportunities
    72 order (NLO) quantum chromodynamics (QCD) corrections
    73 parameters
    74 particles
    75 prediction
    76 presence
    77 production
    78 quantum chromodynamics corrections
    79 quark annihilation
    80 renormalisation
    81 results
    82 scale variations
    83 sections
    84 spin-2
    85 spin-2 particles
    86 standard model
    87 strength
    88 tensor
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