Group for chiral field theories
at the Institute for Theoretical
Physics,
(up to February 2015 with some file udates of theses under my
supervisions)
The
aim of the chiral group is the investigation of modern topics of hadron physics
both in the vacuum and at nonzero temperature and densities. Spectroscopy and
phenomenology of mesons and baryons, the study of chiral partners, spontaneous
symmetry breaking and its restoration in a thermal and dense medium are the
main interests.
Regular meetings
were hold to discuss the above subjects: present schedule here.
Old
meeting of the chiral group (up to Wi. Se. 2014/2015): here.
Group members
Group leaders
Prof. Dr. Dirk H. Rischke and
Prof. Dr. Francesco Giacosa
Group members
Dr. Khaled Teilab
Scientific interests:
“Nucleon-antinucleon scattering and production of ω and η
mesons.”
Anja Habersetzer:
Scientific interests: “Spectral function of the a1 and rho
mesons“ and “Dilepton production in nucleon-nucleon
scattering”.
Diploma thesis: “Spectral densities
of the tau lepton in a global U(2)xU(2) linear sigma model with electroweak
interaction” (pdf)
Lisa Olbrich
PhD thesis (2018): Hyperons in a chiral
approach. (pdf)
Master thesis (2014): “Phenomenology of baryons in the
eLSM” (pdf).
Bachelor thesis (2012): “Phenomenology of pseudo-vector mesons and
mixing effects in the kaonic sector” “(in German) (pdf)
Florian Divotgey
Master thesis (2015): “The
low-energy constants of the extended Linear Sigma Model at tree-level” (pdf).
Bachelor thesis (2012): “Phenomenology of axial-vector mesons and
mixing effects in the kaonic sector” “(in German) (pdf)
Juergen Eser
Scientific interests: “FRG in chiral models”.
Jonas Schneitzer
Scientific interests: “Inhomogeneous chiral
condensation”.
Bachelor thesis (2014): “
Third-order correction to the decay S -> φφ” (in German) (pdf).
Julia Sammet
Master thesis: “Decays of the vector
glueball in a chiral approach”. (in German((pdf)
Bachelor thesis: “Decays of (pseudo)vector glueballs” (in German) (pdf)
Alexander Kevin Nikolla
Bachelor thesis “Randomized pulsed
measurement in Quantum Mechanics”. (pdf)
Dr. Susanna Gallas
Scientific interests: “Baryons in the parity doublet
model”.
Mara Grahl:
Scientific interests: “FRG in chiral models”.
PhD thesis (2014): “Low-energy
effective models for two-flavor
quantum chromodynamics and the
universality hypothesis” (pdf).
Diploma thesis: “The O(N=2) model in polar coordinates at nonzero
temperature” (pdf)
Dr. Denis Parganlija,
Diploma thesis (2008) „pion-pion
scattering in a gauged linear sigma model“ (in German) (pdf)
Ph.D.
thesis (2012)
„Quark-antiquark phenomenology in vacuum” (pdf)
Dr. Elina Seel:
Scientific interests: “Quantum field theories with trace
anomaly”.
Diploma thesis (2009): “Dependence
on the representation of O(2)-symmetric models at nonzero temperature”
(in German) (pdf)
Dr. Achim Heinz:
Scientific interests: “QCD under extreme conditions: the
inhomogeneous condensation” (pdf).
Diploma thesis (2009): “The
influence of a light tetraquark on the chiral phase transition ” (in
German) (pdf)
Dr. Walaa Eshraim: link to homepage
Scientific interests: “Pseudoscalar glueball and charmed mesons
in the eLSM”. (pdf)
Dr. Stanislaus Janowski:
Scientific interests: “Phenomenology of glueballs and
scalar-isoscalar quarkonia within an e_ective hadronic model of QCD”. (pdf)
Diploma thesis (2010): “Phanomenology of the dilaton in a chiral
model with (axial-)vector mesons” (in German) (pdf)
Dr. Thomas Wolkanowski-Gans: link to homepage
PhD thesis (2016): “Dynamical generation of hadronic resonances in effective models
with derivative interactions”. (pdf).
Diploma thesis (2013): “Resonances
and poles in the second Riemann sheet” (pdf)
Aleksander Nikolla:
Diploma thesis (2015): 'Chiral phase
transitions and expansion of the Universe in a phenomenological model of QCD'
Diploma thesis in German: pdf.
Christian Reisinger:
Bachelor thesis (2014): “Phenomenology of the excited vector
meson nonet(s)” (pdf).
Adrian Königstein
Bachelor thesis (2014): “Tensor
fields in QFT and phenomenology of pseudotensor mesons” (pdf).
Nils Saß
Bachelor thesis (2014): “Decays of (pseudo)tensor glueballs in the
eLSM” (pdf).
Sabrina Hempel
Bachelor thesis (2014): “Mixing of scalar
fields at the one-loop order”. (pdf)
Klaus Neuschwander
Bachelor thesis (2012): „Three-body
decays in effective hadronic models“ (in German) (pdf)
Antje Peters
Bachelor thesis (2012): „Baryonic
decays in the eLSM“ (in German) (pdf)
Stefan Strüber
Diploma thesis (2005): “Self-consistent
calculation of the Masses of (pseudo)scalar and (axial-)vector mesons in the
medium” (in German) (pdf)
External members
Dr. Werner Deinet
Scientific interests: “Nucleon-antinucleon
scattering and the deuteron.”
Local
and international collaborations:
Juergen
Schaffner-Bielich and Marc Wagner, Goethe University, Frankfurt (Germany).
Gyuri Wolf, Peter Kovacs, and Miklos Zetenyi, Wigner Research Center of Budapest
(Hungary).
Denis Parganlija, Vienna
University of Technology (Austria).
Giuseppe Pagliara, INFN and University of Ferrara
(Italy).
Pedro Bicudo, IST, Lisboa (Portugal).
Some published works in peer-review journals:
a) The
extended Linear Sigma model (eLSM)
(A summarizing talk about
the eLSM is the
“Antrittsvorlesung” held by F. Giacosa in
S. Janowski, F. Giacosa and D. H. Rischke,
Is f0(1710) a glueball?,
Phys. Rev. D 90 (2014) 11, 114005 http://arxiv.org/pdf/1408.4921.pdf
D. Parganlija, P. Kovacs, G. Wolf, F.
Giacosa, and D. H. Rischke
Meson vacuum phenomenology in a three-flavor
linear sigma model with (axial-) vector mesons.
Phys.Rev. D87 (2013) 014011 http://arxiv.org/abs/arXiv:1208.0585
Decay of the pseudoscalar glueball into scalar and pseudoscalar
mesons.
Phys.Rev. D87 (2013) 054036. http://arxiv.org/abs/arXiv:1208.6474
Stanislaus Janowski, Denis Parganlija, Francesco Giacosa, Dirk H.
Rischke
The
Glueball in a Chiral Linear Sigma Model with Vector Mesons.
Phys.
Rev. D 84, 054007 (2011). http://arxiv.org/abs/arXiv:1103.3238
Denis
Parganlija, Francesco Giacosa, Dirk H. Rischke,
Vacuum
Properties of Mesons in a Linear Sigma Model with Vector Mesons and Global
Chiral Invariance.
Phys.
Rev. D 82, 054024 (2010). http://arxiv.org/abs/arXiv:1003.4934
Susanna
Gallas, Francesco Giacosa, Dirk H. Rischke,
Vacuum
phenomenology of the chiral partner of the nucleon in a linear sigma model with
vector mesons.
Phys.
Rev. D 82 014004, 2010. http://arxiv.org/abs/arXiv:0907.5084
b) Studies at nonzero
temperature and density:
A.
Heinz, F. Giacosa and D. H. Rischke,
Chiral
density wave in nuclear matter
Nucl.
Phys. A, in press. http://arxiv.org/pdf/1312.3244.pdf
M.
Grahl and D. H. Rischke,
Functional
renormalization group study of the two-flavor linear sigma model in the
presence of the axial anomaly.
Phys.
Rev. D 88 (2013) 056014. http://arxiv.org/abs/arXiv:1307.2184
Mara
Grahl, Elina Seel, Francesco Giacosa, Dirk H. Rischke
The
O(2) model in polar coordinates at nonzero temperature.
Phys.
Rev. D 87 (2013) 096014. http://arxiv.org/abs/arXiv:1110.2698
Elina
Seel, Dominik Smith, Stefano Lottini, and Francesco Giacosa
Thermodynamics
of the O(3) model in 1+1 dimensions: lattice vs. analytical results.
JHEP
1307 (2013) 010. http://arxiv.org/abs/arXiv:1209.4243
P.
Bicudo, F. Giacosa and E. Seel,
Computation of Pion and Kaon Heavy Ion Multiplicities in a Gluon-Meson Model.
Phys. Rev. C 86 (2012) 034907. http://arxiv.org/abs/arXiv:1202.1640
Elina
Seel, Stefan Struber, Francesco Giacosa, Dirk H. Rischke
Study
of chiral symmetry restoration in linear and nonlinear O(N) models using the
auxiliary field method.
Phys. Rev. D 86 (2012) 125010. http://arxiv.org/abs/arXiv:1108.1918
F. Giacosa,Analytical study of a gas of gluonic quasiparticles at high temperature: Effective mass, pressure and trace anomaly.
Phys.
Rev. D 83 (2011) 114002. http://arxiv.org/abs/arXiv:1009.4588
Achim
Heinz, Francesco Giacosa, Dirk H. Rischke
Restoration
of chiral symmetry in the large-N_c limit.
Phys.
Rev. D 85 (2012) 056005. http://arxiv.org/abs/arXiv:1110.1528
Susanna
Gallas, Francesco Giacosa, Giuseppe Pagliara
Nuclear
matter within a dilatation-invariant parity doublet model: the role of the
tetraquark at nonzero density.
Published
in Nucl. Phys. A872 (2011) 13-24. http://arxiv.org/abs/arXiv:1105.5003
Achim
Heinz, Stefan Struber, Francesco Giacosa, Dirk H. Rischke,
Role
of the tetraquark in the chiral phase transition.
Phys.
Rev. D 79 037502, 2009. http://arxiv.org/abs/arXiv:0805.1134
S. Strüber and D. H. Rischke,Vector and axialvector mesons at nonzero temperature within a gauged linear sigma model.Phys. Rev. D 77 (2008) 085004. http://arxiv.org/abs/arXiv:0708.2389
c) Other
papers on hadron phenomenology (tetraquarks, mixing, …):
J. Schneitzer, T. Wolkanowski and F. Giacosa,The role of the next-to-leading order triangle-shaped diagram in two-body hadronic decays,
Nucl. Phys. B 288 (2014) 287. http://arxiv.org/pdf/1407.7414.pdf F. Divotgey, L. Olbrich, and F. Giacosa,Phenomenology of axial-vector and pseudovector mesons: decays and mixing in the kaonic sector.
Eur.
Phys. J. A 49 (2013) 135. http://arxiv.org/abs/arXiv:1306.1193
F. Giacosa and T. Wolkanowski,Propagator poles and an emergent stable state below threshold: general discussion and the E(38) state.Mod. Phys. Lett. A 27 (2012) 1250229. http://arxiv.org/abs/arXiv:1209.2332
F. Giacosa,Spontaneous breaking of chiral symmetry, and eventually of parity, in a sigma-model with two Mexican hats.
Eur.
Phys. J. C 65 (2010) 449. http://arxiv.org/abs/arXiv:0907.3519
Francesco
Giacosa,
Dynamical
generation and dynamical reconstruction.
Phys.
Rev. D 80 074028, 2009. http://arxiv.org/abs/arXiv:0903.4481
Francesco Giacosa, Giuseppe Pagliara,
Spectral
functions of scalar mesons.
Published
in Phys. Rev. C 76 065204, 2007. http://arxiv.org/abs/arXiv:0707.3594
Francesco
Giacosa,
Mixing
of scalar tetraquark and quarkonia states in a chiral approach.
Published
in Phys. Rev. D 75 054007,2007. http://arxiv.org/abs/hep-ph/0611388
Francesco
Giacosa,
Strong
and electromagnetic decays of the light scalar mesons interpreted as tetraquark
states,
Phys.
Rev. D 74 014028, 2006. http://arxiv.org/abs/hep-ph/0605191
Contact: giacosa@th.physik.uni-frankfurt.de