Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
arXiv:1505.03162
Abstract
We consider the transverse-momentum (qT) distribution of a diphoton pair produced in hadron collisions. At small values of qT , we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. At intermediate and large values of qT, we consistently combine resummation with the known next-to-leading order perturbative result. All perturbative terms up to order α_S^2 are included in our computation which, after integration over qT, reproduces the known next-to-next-to-leading order result for the diphoton pair production total cross section. We present a comparison with LHC data and an estimate of the perturbative accuracy of the theoretical calculation by performing the corresponding variation of scales. In general we observe that the effect of the resummation is not only to recover the predictivity of the calculation at small transverse momentum, but also to improve substantially the agreement with the experimental data.
arXiv comment17 pages, 16 figures. arXiv admin note: text overlap with arXiv:1007.2351
References in corpus (16)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Drell-Yan production at small q_T, transverse parton distributions and the collinear anomaly
- Production of Drell--Yan lepton pairs in hadron collisions: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
- QCD transverse-momentum resummation in gluon fusion processes
- Measurement of isolated-photon pair production in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
- Transverse-momentum resummation for heavy-quark hadroproduction
- Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at sqrt(s) = 7 TeV
- Search for Extra Dimensions in diphoton events using proton-proton collisions recorded at sqrt(s) = 7 TeV with the ATLAS detector at the LHC
- Transverse momentum resummation effects in W^+W^- measurements
- Photon isolation effects at NLO in gamma gamma + jet final states in hadronic collisions
- Measurement of the Production Cross Section for Pairs of Isolated Photons in pp collisions at sqrt(s) = 7 TeV
- Measurement of the differential cross sections for isolated direct photon pair production in collisions at TeV
- Search for new physics in events with photons, jets, and missing transverse energy in pp collisions at sqrt(s) = 7 TeV
- Next-to-Leading Order Gamma Gamma + 2-Jet Production at the LHC
- Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeV
- Measurement of the Cross Section for Prompt Isolated Diphoton Production in p\bar p Collisions at \sqrt{s} = 1.96 TeV