145 citations · 667 across the 32 of their papers we have counts for
22 papers · 1 filter
Seesaw Limit of the Nelson-Barr Mechanism
A. L. Cherchiglia, A. G. Dias, J. Leite +1
We investigate how the solution to the strong CP problem and the explanation for the observed fermion mass hierarchies can be intrinsically related. Specifically, we explore the Ne…
Infrared Subtleties and Chiral Vertices at NLO: An Implicit Regularization Analysis
Ricardo J. C. Rosado, Adriano Cherchiglia, Marcos Sampaio +1
We employ implicit regularization (IReg) in quark-antiquark decays of the Z, or of a scalar (CP-even or odd) boson at NLO, and compare with dimensional schemes to reveal subtleties…
Explicit parametrization of more than one vector-like quark of Nelson-Barr type
G. H. S. Alves, A. L. Cherchiglia, C. C. Nishi
Nelson-Barr models solve the strong CP problem based on spontaneous CP violation and generically requires vector-like quarks (VLQs) mixing with standard quarks to transmit the CP v…
Connecting to neutrino mass in the extended neutrinophilic 2HDM
A. L. Cherchiglia, G. De Conto, C. C. Nishi
One simple way to lower the scale of the seesaw mechanism that generates neutrino masses is to attribute part of their smallness to a suppressed vacuum expectation value of a secon…
On the viability of a light scalar spectrum for 3-3-1 models
A. L. Cherchiglia, O. L. G. Peres
In this work we study an effective version of the 3-3-1 model, in which the particle content is the same of the 2HDM. We show that the inherited structure from the $SU(3)_C \otimes…
GM2Calc-2 for the 2HDM
Peter Athron, Csaba Balazs, Adriano Cherchiglia +4
GM2Calc is a leading tool for calculating precise contributions to in the Minimal Supersymmetric Standard Model. In this proceeding we detail GM2Calc version 2 where it is ex…
Higgs boson decay into gluons in a 4D regularization: IR cancellation without evanescent fields to NLO
Ana Pereira, Adriano Cherchiglia, Marcos Sampaio +1
Higgs decay using an effective Higgs-Yang-Mills interaction in terms of a dimension five operator as well as usual QCD interactions is revisited in the context of Implicit Regulari…
Leptonic CP violation from a vector-like lepton
A. L. Cherchiglia, G. De Conto, C. C. Nishi
Leptonic CP violation is yet to be confirmed as an additional source of CP violation in fundamental interactions. We study the case where leptonic CP violation is spontaneous and i…
Two-loop gauge coupling -function in a four-dimensional framework: the Standard Model case
Adriano Cherchiglia
At present, the gauge coupling -function in the Standard Model (SM) is known up to four-loop order. As most SM calculations, dimensional regularization was employed. Despite its…
Two-loop Prediction of the Anomalous Magnetic Moment of the Muon in the Two-Higgs Doublet Model with GM2Calc 2
Peter Athron, Csaba Balazs, Adriano Cherchiglia +4
We present an extension of the GM2Calc software to calculate the muon anomalous magnetic moment () in the Two-Higgs Doublet Model. The Two-Higgs Doublet Model is…
A step towards a consistent treatment of chiral theories at higher loop order: the abelian case
Adriano Cherchiglia
As recently pointed out, regularization schemes defined in four-dimensions may also face inconsistencies in the presence of chiral fermions. In this work, we extend this analysis t…
Flavor constraints for a Vector-like quark of Nelson-Barr type
A. L. Cherchiglia, G. De Conto, C. C. Nishi
The Nelson-Barr (NB) mechanism to solve the strong CP problem assumes CP conservation, arranges vanishing at tree-level and requires vector-like quarks (VLQs) to transmit t…
May the four be with you: Novel IR-subtraction methods to tackle NNLO calculations
W. J. Torres Bobadilla, G. F. R. Sborlini, P. Banerjee +21
In this report, we present a discussion about different frameworks to perform precise higher-order computations for high-energy physics. These approaches implement novel strategies…
Two-loop renormalisation of gauge theories in Implicit Regularisation and connections to dimensional methods
A. Cherchiglia, D. C. Arias-Perdomo, A. R. Vieira +2
We compute the two-loop -function of scalar and spinorial quantum electrodynamics as well as pure Yang-Mills and quantum chromodynamics using the background field method in a fu…
Consequences of vector-like quarks of Nelson-Barr type
A. L. Cherchiglia, C. C. Nishi
The Nelson-Barr mechanism to solve the strong CP problem requires vector-like quarks (VLQs) to transmit the spontaneous CP breaking to the SM. We study the scenario where only thes…
Solving the strong CP problem with non-conventional CP
A. L. Cherchiglia, C. C. Nishi
A very simple model is presented where all CP violation in Nature is spontaneous in origin. The CKM phase is generated unsuppressed and the strong CP problem is solved with only mo…
Dimensional regularization vs methods in fixed dimension with and without
A. M. Bruque, A. L. Cherchiglia, M. Perez-Victoria
We study the Lorentz and Dirac algebra, including antisymmetric tensors and the matrix, in implicit gauge-invariant regularization/renormalization methods defined in fixe…
Muon g-2 in the 2HDM: maximum results and detailed phenomenology
Adriano Cherchiglia, Dominik Stöckinger, Hyejung Stöckinger-Kim
We present a comprehensive analysis of the muon magnetic moment in the flavour-aligned two-Higgs doublet model (2HDM) and parameter constraints relevant for . We employ…
One-loop considerations for coexisting vacua in the CP conserving 2HDM
A. L. Cherchiglia, C. C. Nishi
The Two-Higgs-Doublet model (2HDM) is a simple and viable extension of the Standard Model (SM) with a scalar potential complex enough that two minima may coexist. In this work we i…
To , or not to : Recent developments and comparisons of regularization schemes
C. Gnendiger, A. Signer, D. Stöckinger +16
We give an introduction to several regularization schemes that deal with ultraviolet and infrared singularities appearing in higher-order computations in quantum field theories. Co…
The muon magnetic moment in the 2HDM: complete two-loop result
Adriano Cherchiglia, Patrick Kneschke, Dominik Stöckinger +1
We study the contribution to the muon anomalous magnetic moment and present the complete two-loop result, particularly for the bosonic contribution. We focus…
Guises and Disguises of Quadratic Divergences
A. L. Cherchiglia, A. R. Vieira, Brigitte Hiller +2
In this contribution, we present a new perspective on the control of quadratic divergences in quantum field theory, in general, and in the Higgs naturalness problem, in particular.…