منابع مشابه
Heavy-quark pair production at two loops in QCD
We present updated predictions for the total cross section of top-quark pair production at Tevatron and LHC. For the LHC we also provide results at √ s = 10 TeV, in view of the anticipated run in 2008 and quote numbers for the production of new heavy-quark pairs with mass in the range 0.5 – 2 TeV. Our two-loop results incorporate all logarithmically enhanced terms near threshold including Coulo...
متن کاملTwo-Loop Corrections to Heavy Quark Form Factors
The international linear collider will produce large numbers of top-antitop quark pairs, thus allowing for precision studies of the properties of the top quark. These experimental precision studies require equally precise theoretical predictions, i.e. higher order corrections in perturbation theory. Up to now, the theoretical effort was focused on a precise description of top quark production a...
متن کاملThe quark beam function at two loops
In differential measurements at a hadron collider, collinear initial-state radiation is described by process-independent beam functions. They are the field-theoretic analog of initial-state parton showers. Depending on the measured observable they are differential in the virtuality and/or transverse momentum of the colliding partons in addition to the usual longitudinal momentum fraction. Pertu...
متن کاملThe quark Regge trajectory at two loops
The hypothesis of the quark Reggeization is tested by taking the high-energy limit of the two-loop amplitude for quark-gluon scattering which was recently calculated. The limit is compatible with the Reggeization in the leading and the next-to-leading orders and allows the determination of the quark trajectory in the two-loop approximation. The trajectory is presented as an expansion in powers ...
متن کاملHeavy-Higgs Lifetime at Two Loops
The Standard-Model Higgs boson with mass MH ≫ 2MZ decays almost exclusively to pairs of W and Z bosons. We calculate the dominant two-loop corrections, of O(GFM 4 H), to the partial widths of these decays. In the on-mass-shell renormalization scheme, the correction factor is found to be 1 + 14.6%(MH/TeV) 2 + 16.9%(MH/TeV) 4, where the second term is the one-loop correction. We give full analyti...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.97.094022