477 citations · 4.4k across the 102 of their papers we have counts for
6 papers · 1 filter
High Energy WW Scattering at the LHC with the Matrix Element Method
A. Freitas, J. S. Gainer
Perhaps the most important question in particle physics today is whether the boson with mass near 125 GeV discovered at the Large Hadron Collider (LHC) is the Higgs Boson of the St…
Higgs CP Properties From Early LHC Data
Ayres Freitas, Pedro Schwaller
In this paper, we constrain CP violation in the Higgs sector using the measured signal strengths in the various Higgs search channels. To this end, we introduce a general parameter…
Constraining the Intrinsic Structure of Top-Quarks
Christoph Englert, Ayres Freitas, Michael Spira +1
The basic structure of top-quarks as spin-1/2 particles is characterized by the radius and the intrinsic magnetic dipole moment , both individually associated with gauge…
New Physics from the Top at the LHC
Chien-Yi Chen, Ayres Freitas, Tao Han +1
The top quark may hold the key to new physics associated with the electroweak symmetry-breaking sector, given its large mass and enhanced coupling to the Higgs sector. We systemati…
Numerical evaluation of multi-loop integrals using subtraction terms
A. Freitas
A formalism for the numerical integration of one- and two-loop integrals is presented. It is based on subtraction terms which remove the soft, collinear and some of the ultraviolet…
Electroweak two-loop corrections to sin^2θ(eff,bb) and R(b) using numerical Mellin-Barnes integrals
A. Freitas, Yi-Cheng Huang
Multi-loop integrals can be evaluated numerically using Mellin-Barnes representations. Here this technique is applied to the calculation of electroweak two-loop correction with clo…