Inclusive top-pair production phenomenology with TOPIXS

  • M. Beneke
  • P. Falgari
  • S. Klein
  • J. Piclum
  • C. Schwinn
  • M. Ubiali
  • F. Yan
Article

Abstract

We discuss various aspects of inclusive top-quark pair production based on Topixs, a new, flexible program that computes the production cross section at the Tevatron and LHC at next-to-next-to-leading logarithmic accuracy in soft and Coulomb resummation, including bound-state effects and the complete next-to-next-to-leading order result in the \( q\overline q \) channel, which has recently become available. We present the calculation of the top-pair cross section in pp collisions at 8 TeV centre-of-mass energy, as well as the cross sections for hypothetical heavy quarks in extensions of the standard model. The dependence on the parton distribution input is studied. Further we investigate the impact of LHC top cross section measurements at \( \sqrt {s} = {7} \) TeV on global fits of the gluon distribution using the NNPDF re-weighting method.

Keywords

QCD Phenomenology NLO Computations 

References

  1. [1]
    M. Beneke, P. Falgari, S. Klein and C. Schwinn, Hadronic top-quark pair production with NNLL threshold resummation, Nucl. Phys. B 855 (2012) 695 [arXiv:1109.1536] [INSPIRE].ADSCrossRefGoogle Scholar
  2. [2]
    M. Beneke, M. Czakon, P. Falgari, A. Mitov and C. Schwinn, Threshold expansion of the \( gg\left( {q\overline q } \right) \to Q\overline Q + X \) cross section at \( O\left( {\alpha_s^4} \right) \), Phys. Lett. B 690 (2010) 483 [arXiv:0911.5166] [INSPIRE].ADSGoogle Scholar
  3. [3]
    M. Aliev et al., HATHOR: HAdronic Top and Heavy quarks crOss section calculatoR, Comput. Phys. Commun. 182 (2011) 1034 [arXiv:1007.1327] [INSPIRE].ADSMATHCrossRefGoogle Scholar
  4. [4]
    M. Cacciari, M. Czakon, M.L. Mangano, A. Mitov and P. Nason, Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation, Phys. Lett. B 710 (2012) 612 [arXiv:1111.5869] [INSPIRE].ADSGoogle Scholar
  5. [5]
    M. Czakon and A. Mitov, Top++: a program for the calculation of the top-pair cross-section at hadron colliders, arXiv:1112.5675 [INSPIRE].
  6. [6]
    V. Ahrens, A. Ferroglia, M. Neubert, B.D. Pecjak and L.L. Yang, Precision predictions for the t + \( \overline t \) production cross section at hadron colliders, Phys. Lett. B 703 (2011) 135 [arXiv:1105.5824] [INSPIRE].ADSGoogle Scholar
  7. [7]
    N. Kidonakis, Next-to-next-to-leading soft-gluon corrections for the top quark cross section and transverse momentum distribution, Phys. Rev. D 82 (2010) 114030 [arXiv:1009.4935] [INSPIRE].ADSGoogle Scholar
  8. [8]
    S.J. Brodsky and X.-G. Wu, Application of the principle of maximum conformality to top-pair production, Phys. Rev. D 86 (2012) 014021 [arXiv:1204.1405] [INSPIRE].ADSGoogle Scholar
  9. [9]
    P. Bärnreuther, M. Czakon and A. Mitov, Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to \( q\overline q \to t\overline t + X \), arXiv:1204.5201 [INSPIRE].
  10. [10]
    A. Martin, W. Stirling, R. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [arXiv:0901.0002] [INSPIRE].ADSCrossRefGoogle Scholar
  11. [11]
    S. Alekhin, J. Blümlein and S. Moch, Parton distribution functions and benchmark cross sections at NNLO, arXiv:1202.2281 [INSPIRE].
  12. [12]
    P.M. Nadolsky et al., Implications of CTEQ global analysis for collider observables, Phys. Rev. D 78 (2008) 013004 [arXiv:0802.0007] [INSPIRE].ADSGoogle Scholar
  13. [13]
    G. Watt, Parton distribution function dependence of benchmark standard model total cross sections at the 7 TeV LHC, JHEP 09 (2011) 069 [arXiv:1106.5788] [INSPIRE].ADSCrossRefGoogle Scholar
  14. [14]
    NNPDF collaboration, R.D. Ball et al., Reweighting NNPDFs: the W lepton asymmetry, Nucl. Phys. B 849 (2011) 112 [Erratum ibid. B 854 (2012) 926-927] [arXiv:1012.0836] [INSPIRE].
  15. [15]
    R.D. Ball et al., Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data, Nucl. Phys. B 855 (2012) 608 [arXiv:1108.1758] [INSPIRE].ADSCrossRefGoogle Scholar
  16. [16]
    M. Beneke, P. Falgari and C. Schwinn, Soft radiation in heavy-particle pair production: all-order colour structure and two-loop anomalous dimension, Nucl. Phys. B 828 (2010) 69 [arXiv:0907.1443] [INSPIRE].ADSCrossRefGoogle Scholar
  17. [17]
    M. Beneke, P. Falgari and C. Schwinn, Threshold resummation for pair production of coloured heavy (s)particles at hadron colliders, Nucl. Phys. B 842 (2011) 414 [arXiv:1007.5414] [INSPIRE].ADSCrossRefGoogle Scholar
  18. [18]
    T. Becher and M. Neubert, Threshold resummation in momentum space from effective field theory, Phys. Rev. Lett. 97 (2006) 082001 [hep-ph/0605050] [INSPIRE].ADSCrossRefGoogle Scholar
  19. [19]
    T. Becher, M. Neubert and G. Xu, Dynamical threshold enhancement and resummation in Drell-Yan production, JHEP 07 (2008) 030 [arXiv:0710.0680] [INSPIRE].ADSCrossRefGoogle Scholar
  20. [20]
    U. Langenfeld, S. Moch and P. Uwer, Measuring the running top-quark mass, Phys. Rev. D 80 (2009) 054009 [arXiv:0906.5273] [INSPIRE].ADSGoogle Scholar
  21. [21]
    A. Martin, W. Stirling, R. Thorne and G. Watt, Uncertainties on α s in global PDF analyses and implications for predicted hadronic cross sections, Eur. Phys. J. C 64 (2009) 653 [arXiv:0905.3531] [INSPIRE].ADSCrossRefGoogle Scholar
  22. [22]
    M. Beneke, P. Falgari, S. Klein and C. Schwinn, The top-quark pair production cross section at next-to-next-to-leading logarithmic order, arXiv:1112.4606 [INSPIRE].
  23. [23]
    D0 collaboration, V.M. Abazov et al., Determination of the pole and MSbar masses of the top quark from the \( t\overline t \) cross section, Phys. Lett. B 703 (2011) 422 [arXiv:1104.2887] [INSPIRE].ADSGoogle Scholar
  24. [24]
    D0 collaboration, V.M. Abazov et al., Measurement of the \( t\overline t \) production cross section using dilepton events in \( p\overline p \) collisions, Phys. Lett. B 704 (2011) 403 [arXiv:1105.5384] [INSPIRE].ADSGoogle Scholar
  25. [25]
    Tevatron Electroweak Working Group, CDF and D0 collaboration, Combination of CDF and D0 results on the mass of the top quark using up to 5.8 fb 1 of data, arXiv:1107.5255 [INSPIRE].
  26. [26]
    ATLAS collaboration, Measurement of the \( t\overline t \) production cross-section in pp collisions at \( \sqrt {s} = {7} \) TeV using kinematic information of lepton+jets events, ATLAS-CONF-2011-121 (2011).
  27. [27]
    CMS collaboration, M. Aldaya, K. Lipka and S. Naumann-Emme, Determination of the top quark mass from the \( t\overline t \) cross section measured by CMS at \( \sqrt {s} = {7} \) TeV, EPJ Web Conf. 28 (2012) 12044 [arXiv:1201.5336] [INSPIRE].
  28. [28]
    M. Beneke, P. Falgari, S. Klein, J. Piclum and C. Schwinn, NNLL threshold resummation for the total top-pair production cross section, arXiv:1205.0988 [INSPIRE].
  29. [29]
    S. Moch, P. Uwer and A. Vogt, On top-pair hadro-production at next-to-next-to-leading order, Phys. Lett. B 714 (2012) 48 [arXiv:1203.6282] [INSPIRE].ADSGoogle Scholar
  30. [30]
    A. Ferroglia, B.D. Pecjak and L.L. Yang, Soft-gluon resummation for boosted top-quark production at hadron colliders, arXiv:1205.3662 [INSPIRE].
  31. [31]
    R.D. Ball et al., Impact of heavy quark masses on parton distributions and LHC phenomenology, Nucl. Phys. B 849 (2011) 296 [arXiv:1101.1300] [INSPIRE].ADSCrossRefGoogle Scholar
  32. [32]
    H.-L. Lai et al., New parton distributions for collider physics, Phys. Rev. D 82 (2010) 074024 [arXiv:1007.2241] [INSPIRE].ADSGoogle Scholar
  33. [33]
    H.-L. Lai et al., Uncertainty induced by QCD coupling in the CTEQ global analysis of parton distributions, Phys. Rev. D 82 (2010) 054021 [arXiv:1004.4624] [INSPIRE].ADSGoogle Scholar
  34. [34]
    N. Arkani-Hamed, A. Cohen, E. Katz and A. Nelson, The littlest Higgs, JHEP 07 (2002) 034 [hep-ph/0206021] [INSPIRE].MathSciNetADSCrossRefGoogle Scholar
  35. [35]
    M. Perelstein, M.E. Peskin and A. Pierce, Top quarks and electroweak symmetry breaking in little Higgs models, Phys. Rev. D 69 (2004) 075002 [hep-ph/0310039] [INSPIRE].ADSGoogle Scholar
  36. [36]
    K. Agashe, R. Contino, L. Da Rold and A. Pomarol, A custodial symmetry for \( Zb\overline b \), Phys. Lett. B 641 (2006) 62 [hep-ph/0605341] [INSPIRE].ADSGoogle Scholar
  37. [37]
    CMS collaboration, S. Chatrchyan et al., Search for heavy bottom-like quarks in 4.9 inverse femtobarns of pp collisions at \( \sqrt {s} = 7 \) TeV, JHEP 05 (2012) 123 [arXiv:1204.1088] [INSPIRE].ADSCrossRefGoogle Scholar
  38. [38]
    CMS collaboration, S. Chatrchyan et al., Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at \( \sqrt {s} = {7} \) TeV, arXiv:1203.5410 [INSPIRE].
  39. [39]
    CMS collaboration, S. Chatrchyan et al., Search for a vector-like quark with charge 2/3 in t + Z events from pp collisions at \( \sqrt {s} = {7} \) TeV, Phys. Rev. Lett. 107 (2011) 271802 [arXiv:1109.4985] [INSPIRE].ADSCrossRefGoogle Scholar
  40. [40]
    P. Jimenez-Delgado and E. Reya, Variable flavor number parton distributions and weak gauge and Higgs boson production at hadron colliders at NNLO of QCD, Phys. Rev. D 80 (2009) 114011 [arXiv:0909.1711] [INSPIRE].ADSGoogle Scholar
  41. [41]
    H1 and ZEUS collaboration, F. Aaron et al., Combined measurement and QCD analysis of the inclusive e ± p scattering cross sections at HERA, JHEP 01 (2010) 109 [arXiv:0911.0884] [INSPIRE].ADSCrossRefGoogle Scholar
  42. [42]
    G. Watt and R. Thorne, Study of Monte Carlo approach to experimental uncertainty propagation with MSTW 2008 PDFs, arXiv:1205.4024 [INSPIRE].
  43. [43]
    ATLAS collaboration, G. Aad et al., Measurement of the cross section for top-quark pair production in pp collisions at \( \sqrt {s} = {7} \) TeV with the ATLAS detector using final states with two high-p T leptons, JHEP 05 (2012) 059 [arXiv:1202.4892] [INSPIRE].ADSCrossRefGoogle Scholar
  44. [44]
    ATLAS collaboration, Measurement of \( t\overline t \) production in the all-hadronic channel in 1.02 fb −1 of pp collisions at \( \sqrt {s} = {7} \) TeV with the ATLAS detector, ATLAS-CONF-2011-140 (2011).
  45. [45]
    CMS collaboration, Combination of top pair production cross section measurements, PAS-TOP-11-024 (2011).
  46. [46]
    J.M. Campbell, J. Huston and W. Stirling, Hard interactions of quarks and gluons: a primer for LHC physics, Rept. Prog. Phys. 70 (2007) 89 [hep-ph/0611148] [INSPIRE].ADSCrossRefGoogle Scholar
  47. [47]
    T. Gehrmann and E. Remiddi, Numerical evaluation of harmonic polylogarithms, Comput. Phys. Commun. 141 (2001) 296 [hep-ph/0107173] [INSPIRE].MathSciNetADSMATHCrossRefGoogle Scholar
  48. [48]
    R. Piessens, E. de Doncker-Kapenga, C. Überhuber and D. Kahaner, QUADPACK: a subroutine package for automatic integration, Springer Series in Computational Mathematics, Springer, U.S.A. (1983).Google Scholar
  49. [49]
    M. Whalley, D. Bourilkov and R. Group, The Les Houches accord PDFs (LHAPDF) and LHAGLUE, hep-ph/0508110 [INSPIRE].
  50. [50]
    M. Galassi et al., GNU scientific library reference manual, 3rd edition, Network Theory Ltd., U.S.A. (2009).Google Scholar

Copyright information

© SISSA, Trieste, Italy 2012

Authors and Affiliations

  • M. Beneke
    • 1
    • 2
  • P. Falgari
    • 3
  • S. Klein
    • 2
  • J. Piclum
    • 1
    • 2
  • C. Schwinn
    • 4
  • M. Ubiali
    • 2
  • F. Yan
    • 2
  1. 1.Physik Department T31, James-Franck-StraßeTechnische Universität MünchenGarchingGermany
  2. 2.Institut für Theoretische Teilchenphysik und KosmologieRWTH Aachen UniversityAachenGermany
  3. 3.Institute for Theoretical Physics and Spinoza InstituteUtrecht UniversityUtrechtThe Netherlands
  4. 4.Albert-Ludwigs Universität Freiburg, Physikalisches InstitutFreiburgGermany

Personalised recommendations