Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
TL;DR: In this paper, soft-gluon corrections to the total t t ¯ cross-section at hadron colliders at the next to next-to-leading logarithmic (NNLL) order were performed.
About: This article is published in Physics Letters B.The article was published on 2012-04-20 and is currently open access. It has received 622 citations till now. The article focuses on the topics: Resummation.
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TL;DR: In this article, the first determination of parton distributions of the nucleon at NLO and NNLO based on a global data set which includes LHC data: NNPDF2.3 is presented, which includes, besides the deep inelastic, Drell-Yan, gauge boson production and jet data already used in previous global PDF determinations, all relevant LHC Data for which experimental systematic uncertainties are currently available: ATLAS and LHCb W and Z rapidity distributions from the 2010 run, CMS W electron asymmetry data from the 2011 run,
1,809 citations
TL;DR: The program Top++ calculates the cross-section in (a) fixed order approach with exact next-to-next-to leading order (NNLO) accuracy and (b) by including soft-gluon resummation for the hadronic cross- section in Mellin space with full next- to-next -to-leading logarithmic (NNLL) accuracy.
1,186 citations
TL;DR: In this article, the authors compute the next-to-next-to leading order QCD correction to the total inclusive top pair production cross-section in the reaction $ qg\to t\overline{t}+X $ fixme.
Abstract: We compute the next-to-next-to-leading order QCD correction to the total inclusive top pair production cross-section in the reaction $ qg\to t\overline{t}+X $
. We find moderate $ \mathcal{O} $
(1%) correction to central values at both Tevatron and LHC. The scale variation of the cross-section remains unchanged at the Tevatron and is significantly reduced at the LHC. We find that recently introduced approximation based on the high-energy limit of the top pair cross-section significantly deviates from the exact result. The results derived in the present work are included in version 1.4 of the program Top++. Work towards computing the reaction $ gg\to t\overline{t}+X $
is ongoing.
564 citations
TL;DR: In this paper, the NNLO correction to the total top-pair production cross-section at the Tevatron and LHC has been studied at the permil level.
Abstract: This is a second paper in our ongoing calculation of the next-to-next-to-leading order (NNLO) QCD correction to the total inclusive top-pair production cross-section at hadron colliders. In this paper we calculate the reaction $ q\overline{q}\to t\overline{t}+q\overline{q} $
which was not considered in our previous work on $ q\overline{q}\to t\overline{t}+X $
[1] due to its phenomenologically negligible size. We also calculate all remaining fermion-pair-initiated partonic channels $ q{q^{\prime }} $
, $ q{{\overline{q}}^{\prime }} $
and qq that contribute to top-pair production starting from NNLO. The contributions of these reactions to the total cross-section for top-pair production at the Tevatron and LHC are small, at the permil level. The most interesting feature of these reactions is their characteristic logarithmic rise in the high energy limit. We compute the constant term in the leading power behavior in this limit, and achieve precision that is an order of magnitude better than the precision of a recent theoretical prediction for this constant. All four partonic reactions computed in this paper are included in our numerical program Top++. The calculation of the NNLO corrections to the two remaining partonic reactions, $ qg\to t\overline{t}+X $
and $ gg\to t\overline{t}+X $
, is ongoing.
557 citations
TL;DR: In this paper, the top quark pole mass at the Tevatron has been determined to be 173.3 ± 2.7 GeV by using the total cross-section for top-quark pair production at the hadron colliders.
458 citations
References
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TL;DR: In this paper, the authors presented an updated leading-order, next-to-leading order and next-next-ordering order parton distribution function (MSTW 2008) determined from global analysis of hard-scattering data within the standard framework of leading-twist fixed-order collinear factorisation in the $\overline{\mathrm{MS}}$¯¯$¯¯¯¯¯
Abstract: We present updated leading-order, next-to-leading order and next-to-next-to-leading order parton distribution functions (“MSTW 2008”) determined from global analysis of hard-scattering data within the standard framework of leading-twist fixed-order collinear factorisation in the $\overline{\mathrm{MS}}$
scheme. These parton distributions supersede the previously available “MRST” sets and should be used for the first LHC data taking and for the associated theoretical calculations. New data sets fitted include CCFR/NuTeV dimuon cross sections, which constrain the strange-quark and -antiquark distributions, and Tevatron Run II data on inclusive jet production, the lepton charge asymmetry from W decays and the Z rapidity distribution. Uncertainties are propagated from the experimental errors on the fitted data points using a new dynamic procedure for each eigenvector of the covariance matrix. We discuss the major changes compared to previous MRST fits, briefly compare to parton distributions obtained by other fitting groups, and give predictions for the W and Z total cross sections at the Tevatron and LHC.
3,546 citations
TL;DR: In this article, the authors extract new parton distribution functions (PDFs) of the proton by global analysis of hard scattering data in the general-mass framework of perturbative quantum chromodynamics.
Abstract: We extract new parton distribution functions (PDFs) of the proton by global analysis of hard scattering data in the general-mass framework of perturbative quantum chromodynamics Our analysis includes new theoretical developments together with the most recent collider data from deep-inelastic scattering, vector boson production, and single-inclusive jet production Because of the difficulty in fitting both the D0 Run-II W lepton asymmetry data and some fixed-target DIS data, we present two families of PDFs, CT10 and CT10W, without and with these high-luminosity W lepton asymmetry data included in the global analysis With both sets of PDFs, we study theoretical predictions and uncertainties for a diverse selection of processes at the Fermilab Tevatron and the CERN Large Hadron Collider
2,349 citations
TL;DR: In this article, the authors compute the next-to-next-toleading order (NNLO) contributions to the three splitting functions governing the evolution of unpolarized non-singlet combinations of quark densities in perturbative QCD.
1,323 citations
TL;DR: The program Top++ calculates the cross-section in (a) fixed order approach with exact next-to-next-to leading order (NNLO) accuracy and (b) by including soft-gluon resummation for the hadronic cross- section in Mellin space with full next- to-next -to-leading logarithmic (NNLL) accuracy.
1,186 citations
TL;DR: In this paper, the authors present the results of a full calculation of the QCD O(a$) radiative corrections to the total cross-aection for the production of a heavy quark pair.
802 citations