Carl F. Berger

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We present the next-to-leading order (NLO) QCD results for W+4-jet production at hadron colliders. This is the first hadron-collider process with five final-state objects to be computed at NLO. It represents an important background to many searches for new physics at the energy frontier. Total cross sections, as well as distributions in the jet transverse(More)
We report on the first next-to-leading order QCD computation of W+3-jet production in hadronic collisions including all partonic subprocesses. We compare the results with data from the Tevatron and find excellent agreement. The required one-loop matrix elements are computed using on-shell methods, implemented in a numerical program, BlackHat. We use the(More)
OBJECTIVE User data and information about anatomy education were used to guide development of a learning environment that is efficient and effective. The research question focused on how to design instructional software suitable for the educational goals of different groups of users of the Visible Human data set. The ultimate goal of the study was to(More)
Citation Berger, C.F. et al "Next-to-leading order QCD predictions for W+3-jet distributions at hadron colliders. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this(More)
  • A Juste, Y Kiyo, F Petriello, T Teubner, K Agashe, P Batra +12 others
  • 2006
p This report discusses several topics in both top quark physics and QCD at an International Linear Collider (ILC). Issues such as measurements at the t ¯ t threshold, including both theoretical and machine requirements, and the determination of electroweak top quark couplings are reviewed. New results concerning the potential of a 500 GeV e + e − collider(More)
We describe BlackHat, an automated C++ program for calculating one-loop amplitudes, and the techniques used in its construction. These include the unitarity method and on-shell recursion. The other ingredients are compact analytic formulae for tree amplitudes for four-dimensional helicity states. The program computes amplitudes numerically, using analytic(More)
We study baryon pair production in two-photon collisions, γγ → B ¯ B, within perturbative quantum chromodynamics, treating baryons as quark-diquark systems. We extend previous work within the same approach by treating constituent-mass effects systematically by means of an expansion in the small parameter (mass/photon energy). Our approach enables us to give(More)
  • C F Berger, J S Gainer, J L Hewett, B Lillie, T G Rizzo
  • 2009
Citation Berger, C.F. et al. "General features of supersymmetric signals at the ILC: Solving the CERN LHC inverse problem. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how(More)