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Higher order corrections to spin correlations in top quark pair production at the LHC

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arxiv 1901.05407 v1 pith:3JCWLMHU submitted 2019-01-16 hep-ph hep-ex

classification hep-phhep-ex
keywords correctionsnnlocorrelationsdelta-phiorderpairproductionquark
verification ladder T0 review T1 audit T2 compute T3 formal

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We calculate, for the first time, the next-to-next-to leading order (NNLO) QCD corrections to spin correlations in top quark pair production at the LHC. The NNLO corrections play an important role in the description of the corresponding differential distributions. We observe that the Standard Model calculation describes the available delta-phi data in the fiducial region but does not agree with the delta-phi measurement extrapolated to full phase space. Most likely this discrepancy is due to the difference in precision between existing event generators and NNLO calculations for dilepton top-pair final states.

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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Towards NNLO QCD predictions for off-shell top-quark pair production and decays

    hep-ph 2025-07 conditional novelty 8.0 of 10

    The first NNLO QCD prediction for off-shell W+W-bbbar production with massive bottom quarks at the LHC, using a double-pole approximation for the two-loop virtual and an on-shell matching for non-factorisable corrections.

  2. Complete NLO corrections to off-shell $\boldsymbol{t\bar{t}}$ production in the $\boldsymbol{\ell+j}$ decay channel

    hep-ph 2025-12 unverdicted novelty 7.0 of 10

    First complete NLO QCD+EW predictions for off-shell ttbar production in the lepton+jets channel, including all subleading Born and NLO terms and an IR-safe photon-jet treatment, at 13.6 TeV.

  3. Top-quark properties at ATLAS

    hep-ex 2019-08 accept

    An ATLAS conference summary reporting m_t^pole = 171.1 GeV from ttbar+1-jet and a 3.2 sigma high spin correlation in ttbar dilepton events, with no new results beyond the cited papers.

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