Duifje VAN EGMOND

post Doctoral Fellow

Research group: Particle Physics

Research interests :

My main research interest is in non-perturbative aspects of Quantum Chromodynamics (QCD). I am especially interested in proposals aimed at an analytical description of the confinement/deconfinement transition of quarks and gluons.

I studied Physics at the University of Amsterdam, where I obtained my M.Sc. in 2016. In 2020, I obtained my PhD at the State University of Rio de Janeiro. During my PhD, I worked on the gauge-invariant description of Yang-Mills-Higgs models by means of gauge-invariant local composite operators, with a special focus on the spectral properties of these gauge-invariant operators.

I am currently working on a project in collaboration with dr. Urko Reinosa. This project entails the two-loop study of the deconfinement transition in the Gribov-Zwanziger (GZ) model at finite temperature, based in the so-called background field gauge (BFG) methods in the Landau-DeWitt gauge. BFG methods provide an efficient way to describe the confinement-deconfinement order parameter (the Polyakov loop or any of its proxies) because the related center symmetry is explicit at the quantum level and is easily maintained in approximation schemes. With the GZ model, we hope to get a perspective into confinement/de-confinement transition in the infrared regime and to compare our results with numerical results from lattice simulations. Several side projects have emerged from this project: one about the technicalities of calculating the sunset diagram for imaginary masses, and project on the formal treatment of the Cartan-Weyl color bases for SU(N) gauge models.

Non-perturbative QCD is a topic that is being investigated in a wide range of research fields. I am interested to make a connection to these fields and collaborate with physicists from different disciplines, such as AdS/CFT, lattice simulations or phenomenology.

Thesis :

Thesis title: Working towards a gauge-invariant description of the Higgs model: from local composite operators to spectral density functions.
University: State University of Rio de Janeiro
Date of defense: 11/09/2020
Advisor: dr. Marcelo Guimarães

Publications :

[1] “Signatures of the Yang-Mills deconfinement transition from the gluon two-point correlator”
D. M. van Egmond and U. Reinosa
In preprint at Phys. Rev. D

[2] “Polyakov loop, gluon mass, gluon condensate and its asymmetry near deconfinement”
D. Dudal, D. M. van Egmond, U. Reinosa and D. Vercauteren
In preprint at Phys. Rev. D

[3] “Gauge invariant operators in the SU(2) Higgs model: Ward identities and renormalization”
D. Dudal, D. M. van Egmond, I. F. Justo, G. Peruzzo and S. P. Sorella.
Phys. Rev. D 105, no.6, 065018 (2022) DOI:10.1103/PhysRevD.105.065018

[4] “A novel background field approach to the confinement-deconfinement transition”
D. M. van Egmond, U. Reinosa, J. Serreau and M. Tissier.
SciPost Phys. 12, no.3, 087 (2022) DOI:10.21468/SciPostPhys.12.3.087

[5] “Spectral properties of local gauge invariant composite operators in the SU(2) Yang–Mills–Higgs model”
D. Dudal, D. M. van Egmond, M. S. Guimaraes, L. F. Palhares, G. Peruzzo and S. P. Sorella.
Eur. Phys. J. C 81, no.3, 222 (2021) DOI:10.1140/epjc/s10052-021-09008-9

[6] “The scalar sunset diagram at finite temperature with imaginary square masses.”
D.M. van Egmond, U. Reinosa.
Phys. Rev. D102 (2020), 036013;DOI: 10.1103/PhysRevD.102.036013

[7] “ Gauge-invariant spectral description of the U(1) Higgs model from local composite operators.”
D. Dudal, D. M. van Egmond, M. S. Guimaraes, O. Holanda, L. F. Palhares, G. Peruzzo and S. P. Sorella.
JHEP 02, 188 (2020) DOI:10.1007/JHEP02(2020)188

[8] “Some remarks on the spectral functions of the Abelian Higgs Model”
D. Dudal, D. M. van Egmond, M. S. Guimaraes, O. Holanda, B. W. Mintz, L. F. Palhares, G. Peruzzo and S. P. Sorella.
Phys.Rev. D100 (2019) no.6, 065009; DOI: 10.1103/PhysRevD.100.065009.

[9] “Renormalizability of N=1 super Yang-Mills theory in Landau gauge with a Stueckelberglike field ”
M. A. L. Capri, D. M. Van Egmond, M. S. Guimaraes,O. Holanda, S. P. Sorella, R.C. Terin and H.C. Toledo.
Eur.Phys.J. C78 (2018) no.10, 797 ; DOI: 10.1140/epjc/s10052-018-6239-5; e-Print: arXiv:1803.03077 [hep-th].

[10] “ On a renormalizable class of gauge fixings for the gauge invariant operator A2 min ”
M. A. L. Capri, D. M. Van Egmond, M. S. Guimaraes,O. Holanda, S. P. Sorella, R.C. Terin and H.C. Toledo.
Annals Phys. 390 (2018) 214-235 ; DOI: 10.1016/j.aop.2018.01.009 ; e-Print: arXiv:1712.04073 [hep-th].