The Matrix Element Method at Next-to-Leading Order

Article, Preprint English OPEN
Campbell, John M. ; Giele, Walter T. ; Williams, Ciaran (2012)
  • Publisher: Springer Nature
  • Journal: Journal of High Energy Physics
  • Related identifiers: doi: 10.1007/JHEP11(2012)043
  • Subject: High Energy Physics - Phenomenology | High Energy Physics - Experiment | Nuclear and High Energy Physics

This paper presents an extension of the matrix element method to next-to-leading order in perturbation theory. To accomplish this we have developed a method to calculate next-to-leading order weights on an event-by-event basis. This allows for the definition of next-to-leading order likelihoods in exactly the same fashion as at leading order, thus extending the matrix element method to next-to-leading order. A welcome by-product of the method is the straightforward and efficient generation of unweighted next-to-leading order events. As examples of the application of our next-to-leading order matrix element method we consider the measurement of the mass of the Z boson and also the search for the Higgs boson in the four lepton channel.
  • References (35)
    35 references, page 1 of 4

    [5] Y. Gao et al., Spin determination of single-produced resonances at hadron colliders, Phys. Rev. D 81 (2010) 075022 [arXiv:1001.3396] [INSPIRE].

    [6] A. De Rujula, J. Lykken, M. Pierini, C. Rogan and M. Spiropulu, Higgs look-alikes at the LHC, Phys. Rev. D 82 (2010) 013003 [arXiv:1001.5300] [INSPIRE].

    [7] CDF collaboration, T. Aaltonen et al., Evidence for a Mass Dependent Forward-Backward Asymmetry in Top Quark Pair Production, Phys. Rev. D 83 (2011) 112003 [arXiv:1101.0034] [INSPIRE].

    [8] D0 collaboration, V.M. Abazov et al., Forward-backward asymmetry in top quark-antiquark production, Phys. Rev. D 84 (2011) 112005 [arXiv:1107.4995] [INSPIRE].

    [9] K. Kondo, Dynamical likelihood method for reconstruction of events with missing momentum. 2: Mass spectra for 2 →; 2 processes, J.Phys.Soc.Jap. 60 (1991) 836.

    [10] R. Dalitz and G.R. Goldstein, The Decay and polarization properties of the top quark, Phys. Rev. D 45 (1992) 1531 [INSPIRE].

    [11] D0 collaboration, V. Abazov et al., A precision measurement of the mass of the top quark, Nature 429 (2004) 638 [hep-ex/0406031] [INSPIRE].

    [12] D0 collaboration, V. Abazov et al., Measurement of the top quark mass in the lepton+jets final state with the matrix element method, Phys. Rev. D 74 (2006) 092005 [hep-ex/0609053] [INSPIRE].

    [13] CDF collaboration, A. Abulencia et al., Precise measurement of the top quark mass in the lepton+jets topology at CDF II, Phys. Rev. Lett. 99 (2007) 182002 [hep-ex/0703045] [INSPIRE].

    [14] CDF collaboration, A. Abulencia et al., Precision measurement of the top quark mass from dilepton events at CDF II, Phys. Rev. D 75 (2007) 031105 [hep-ex/0612060] [INSPIRE].

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