Address: CFTP, Departamento de Fisica

Research interests
My research interests involve nonperturbative QCD, DysonSchwinger equations, and the application of boundstate equations (BetheSalpeter and Faddeev equations) to hadron properties with emphasis on baryons, tetraquarks and multiquark systems.
Biographical sketch
 2017  present: FCT Investigator, IST Lisbon
 2013  2017: PostDoc, University of Giessen
 20102013: FWF ErwinSchrödinger Fellow, Universities of Giessen and Graz
 20092010: PostDoc, Technical University of Darmstadt
 2009: Ph.D., University of Graz, Austria
 20072008: Visiting graduate student, Argonne National Laboratory, Argonne, USA
 20062009: Ph.D. student in the FWF Doctoral Program "Hadrons in Vacuum, Nuclei and Stars", University of Graz, Austria
Quick links
 My PhD thesis >>
 Our recent review on baryons >>
 QFT lecture, summer term 2015 >>
 Hadron physics lecture, winter term 2014 >>
Publications
The
publication list and
citation summary are also available from INSPIRE.

Electromagnetic decays of the neutral pion
Esther Weil, Gernot Eichmann, Christian S. Fischer, Richard Williams
ePrint: 1704.06046 [hepph].
 On the largeQ2 behavior of the pion transition form factor
Gernot Eichmann, Christian S. Fischer, Esther Weil, Richard Williams
ePrint: 1704.05774 [hepph].
 More about the light baryon spectrum
Gernot Eichmann
Few Body Syst. 58 (2017) no. 2, 81
ePrint: 1611.10118 [hepph].
 On light baryons and their excitations
Gernot Eichmann, Christian S. Fischer, Helios SanchisAlepuz
Phys. Rev. D94 (2016) 9, 094033
ePrint: 1607.05748 [hepph].
 Baryons as relativistic threequark bound states
Gernot Eichmann, Helios SanchisAlepuz, Richard Williams, Reinhard Alkofer,
Christian S. Fischer. Prog. Part. Nucl. Phys. 91 (2016) 1100
ePrint: 1606.09602 [hepph].
 Progress in the calculation of nucleon transition form factors
Gernot Eichmann
Few Body Syst. 57 (2016) no. 10, 965973
ePrint: 1602.03462 [hepph].
 Towards a microscopic understanding of nucleon polarizabilities
Gernot Eichmann
Few Body Syst. 57 (2016) no. 7, 541547
ePrint: 1601.04154 [hepph].
 Baryon effects on the location of QCD's critical end point
Gernot Eichmann, Christian S. Fischer, Christian A. Welzbacher
Phys. Rev. D93 (2016) 3, 034013
ePrint: 1509.02082 [hepph].
 The light scalar mesons as tetraquarks
Gernot Eichmann, Christian S. Fischer, Walter Heupel
Phys. Lett. B753 (2016) 282287
ePrint: 1508.07178 [hepph].
 Fourpoint functions and the permutation group S4
Gernot Eichmann, Christian S. Fischer, Walter Heupel
Phys. Rev. D92 (2015) 5, 056005
ePrint: 1505.06336 [hepph].
 Electromagnetic baryon form factors in the Poincarécovariant Faddeev approach
Reinhard Alkofer, Gernot Eichmann, Helios SanchisAlepuz, Richard Williams
Hyperfine Interact. 234 (2015) 13, 149154
ePrint: 1412.8413 [hepph].
 The threegluon vertex in Landau gauge
Gernot Eichmann, Richard Williams, Reinhard Alkofer, Milan Vujinovic
Phys. Rev. D89, 105014 (2014)
ePrint: 1402.1365 [hepph].
 Nucleon Compton scattering in the DysonSchwinger approach
Gernot Eichmann, Christian S. Fischer
Phys. Rev. D87, 036006 (2013)
ePrint: 1212.1761 [hepph].
 Tetraquark bound states in a BetheSalpeter approach
Walter Heupel, Gernot Eichmann, Christian S. Fischer
Phys.Lett. B718, 545 (2012)
ePrint: 1206.5129 [hepph].
 Nucleon to Delta electromagnetic transition in the
DysonSchwinger approach
Gernot Eichmann, Diana Nicmorus
Phys. Rev. D85, 093004 (2012)
ePrint: 1112.2232 [hepph].
 Nucleon axial and pseudoscalar form factors
from the covariant Faddeev equation
Gernot Eichmann, Christian S. Fischer
Eur. Phys. J. A 48 (2011) 9
ePrint: 1111.2614 [hepph].
 Unified description of hadronphoton and hadronmeson
scattering
in the DysonSchwinger approach
Gernot Eichmann, Christian S. Fischer
Phys. Rev. D85, 034015 (2012)
ePrint: 1111.0197 [hepph].
 Delta and Omega masses in a threequark covariant
Faddeev approach
Helios SanchisAlepuz, Gernot Eichmann, Selym VillalbaChavez, Reinhard Alkofer
Phys. Rev. D84, 096003 (2011)
ePrint: 1109.0199 [hepph].
 Hadronic decays of mesons and baryons in the
DysonSchwinger approach
Valentin Mader, Gernot Eichmann, Martina Blank, Andreas Krassnigg
Phys. Rev. D84, 034012 (2011)
ePrint: 1106.3159 [hepph].
 Nucleon electromagnetic form factors from the covariant
Faddeev equation
Gernot Eichmann
Phys. Rev. D84, 014014 (2011)
ePrint: 1104.4505 [hepph].
 Delta and Omega electromagnetic form factors in a
DysonSchwinger/BetheSalpeter approach
Diana Nicmorus, Gernot Eichmann, Reinhard Alkofer
Phys.Rev. D82, 114017 (2010)
ePrint: 1008.3184 [hepph].
 Nucleon mass from a covariant threequark Faddeev
equation
Gernot Eichmann, Reinhard Alkofer, Andreas Krassnigg, Diana Nicmorus
Phys. Rev. Lett. 104, 201601 (2010)
ePrint: 0912.2246 [hepph].
 Deltabaryon mass in a covariant Faddeev approach
D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer.
Phys. Rev. D80, 054028 (2009)
ePrint: 0812.1665 [hepph].
 Survey of nucleon electromagnetic form factors
I.C. Cloet, G. Eichmann, B. ElBennich, T. Klahn, C.D. Roberts.
Few Body Syst. 46, 136 (2009)
ePrint: 0812.0416 [nuclth].
 Toward unifying the description of meson and baryon
properties
G. Eichmann, I.C. Cloet, R. Alkofer, A. Krassnigg, C.D. Roberts.
Phys. Rev. C79, 012202(R) (2009)
ePrint: 0810.1222 [nuclth].
 Current quark mass dependence of nucleon magnetic
moments and radii
I.C. Cloet, G. Eichmann, V.V. Flambaum, C.D. Roberts, M.S. Bhagwat, A. Holl.
Few Body Syst. 42, 91113 (2008)
ePrint: 0804.3118 [nuclth].
 Perspective on rainbowladder truncation
G. Eichmann, R. Alkofer, I. C. Cloet, A. Krassnigg, C. D. Roberts.
Phys. Rev. C77, 042202(R) (2008)
ePrint: 0802.1948 [nuclth].
 A covariant view on the nucleons' quark core
G. Eichmann, A. Krassnigg, M. Schwinzerl and R. Alkofer.
Annals Phys. 323, 25052553 (2008)
ePrint: 0712.2666 [hepph].
Conference proceedings:
 Tetraquarks from the BetheSalpeter equation
Gernot Eichmann, Christian S. Fischer, Walter Heupel
Acta Phys.Polon.Supp. 8 (2015) 425
ePrint: 1507.05022 [hepph].
 Hadron properties from the DysonSchwinger approach
Gernot Eichmann
MesonNet 2014 International Workshop. Miniproceedings
ePrint: 1412.5451 [nuclex].
 The muon g2: DysonSchwinger status on hadronic lightbylight scattering
Gernot Eichmann, Christian S. Fischer, Walter Heupel, Richard Williams
Proceedings of Confinement XI
AIP Conf. Proc. 1701, 040004 (2016).
ePrint: 1411.7876 [hepph].
 Nonperturbative features of the threegluon vertex in Landau gauge
Milan Vujinovic, Reinhard Alkofer, Gernot Eichmann, Richard Williams
Proceedings of Excited QCD 2014
Acta Phys. Polon. Supp. 7 (2014) 3, 607.
ePrint: 1404.4474 [hepph].
 Probing nucleons with photons at the quark level
Gernot Eichmann
Proceedings of Excited QCD 2014
Acta Phys. Polon. Supp. 7 (2014) 3, 597.
ePrint: 1404.4149 [hepph].
 On propagators and threepoint functions in Landau gauge QCD
and QCDlike theories
Reinhard Alkofer, Gernot Eichmann, Christian S. Fischer, Markus Hopfer,
Milan Vujinovic, Richard Williams, Andreas Windisch
PoS QCDTNTIII (2013) 003
ePrint: 1405.7310 [hepph].
 The role of pions as virtual constituents of light bound states
Walter Heupel, Stanislav Kubrak, Gernot Eichmann, Christian Fischer
PoS Bormio2013 (2013) 065
ePrint: 1305.0650 [hepph].
 Hadron phenomenology in the DysonSchwinger approach
Gernot Eichmann
Proceedings of FAIRNESS 2012
J. Phys. Conf. Ser. 426 (2013) 012014.
 Nucleon Compton scattering from the DysonSchwinger perspective
Gernot Eichmann, Christian S. Fischer
PoS ConfinementX (2012) 090
ePrint: 1301.1194 [hepph].
 From quarks and gluons to baryon form factors
Gernot Eichmann
Erice Proceedings, 33rd International Workshop on Nuclear Physics
Prog. Part. Nucl. Phys. 67 (2012) 234.
 Baryon form factors from DysonSchwinger equations
Gernot Eichmann
PoS QCDTNTII (2011) 017
ePrint: 1112.4888 [hepph].
 Model comparison of Delta and Omega masses
in a covariant Faddeev approach
H. SanchisAlepuz, R. Alkofer, G. Eichmann, R. Williams.
PoS QCDTNTII (2011) 041
ePrint: 1112.3214 [hepph].
 On baryon properties from a covariant Faddeev approach
H. SanchisAlepuz, R. Alkofer, G. Eichmann, S. VillalbaChavez.
PoS LC 2010 018 (2010)
ePrint: 1010.6183 [hepph].
 Baryons in and beyond the quarkdiquark model
G. Eichmann, R. Alkofer, C. S. Fischer, A. Krassnigg, D. Nicmorus.
AIP Conf. Proc. 1374 (2011) 617620
ePrint: 1010.0206 [hepph].
 Delta properties in the rainbowladder truncation
of DysonSchwinger equations
D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer.
Few Body Syst. 49, 255261 (2011)
ePrint: 1008.4149 [hepph].
 Hadron properties from QCD boundstate equations: A
status report
R. Alkofer, G. Eichmann, A. Krassnigg, D. Nicmorus.
Chin. Phys. C34, 11751180 (2010)
ePrint: 0912.3105 [hepph].
 Covariant solution of the threequark problem in quantum
field theory:
the nucleon
G. Eichmann, R. Alkofer, A. Krassnigg, D. Nicmorus
EPJ Web Conf. 3:03028 (2010)
ePrint: 0912.2876 [hepph].
 Meson and nucleon properties from DysonSchwinger QCD
G. Eichmann, R. Alkofer, A. Krassnigg, D. Nicmorus.
PoS CONFINEMENT8 077 (2008)
ePrint: 0812.3183 [hepph].
 Faddeev equations: A view of baryon properties
D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer.
PoS CONFINEMENT8 052 (2008)
ePrint: 0812.2966 [hepph].
 The nucleon as a QCD bound state in a Faddeev approach
G. Eichmann, A. Krassnigg, M. Schwinzerl and R. Alkofer.
Prog. Part. Nucl. Phys. 61:8485 (2008)
Teaching
 Winter term 2016/17: Übungen
zur Höheren Quantenmechanik,
University of Giessen  Summer term 2015:
Lecture 'Quantum Field Theory',
University of Giessen  Winter term 2014/15:
Lecture 'Introduction to hadron physics',
University of Giessen  Winter term 2013/14: Übungen zur Elektrodynamik, University of Giessen
 Summer term 2013: Lecture 'Hadron physics', University of Graz
 Summer term 2012: Übungen zur Quantenfeldtheorie, University of Giessen
 Winter term 2011/12: Übungen
zur Statistischen Thermodynamik,
University of Giessen  Summer term 2011: Übungen zur Quantenfeldtheorie, University of Giessen
 Winter term 2009/10: Übungen zu Theoretische Physik III: Klassische Teilchen und Felder II, Technical University of Darmstadt
 Winter term
2008/09: Übungen zu
Mathematische Methoden 5,
University of Graz
Talks
 May 30, 2017
"Microscopic approach to meson electroproduction",
Nucleon and Resonance Structure with Hard Exclusive Processes, Orsay, France  May 18, 2017
"Baryons as relativistic threequark bound states",
Theory seminar, FriedrichSchillerUniversität Jena, Germany  May 16, 2017
"QCD's correlation functions and their relevance for hadron physics",
GRK seminar, FriedrichSchillerUniversität Jena, Germany  May 8, 2017
"The structure of light baryons and tetraquarks",
Excited QCD 2017, Sintra, Portugal  March 31, 2017
"Baryons as quark bound states",
Plenary talk at the 81th Annual DPG Meeting, Münster, Germany  Feb 22, 2017
"Excited baryons / Pion transition form factor",
Bound states in QCD and beyond II, St. Goar, Germany  November 15, 2016
"Progress in continuum calculations of nucleon transition form factors",
Spectrum and structure of excited nucleons from exclusive electroproduction, Seattle, Washington, USA  October 20, 2016
"From QCD's npoint functions to nucleon resonances",
Nonperturbative QCD 2016, Sevilla, Spain  September 29, 2016
" DysonSchwinger approach to the muon g2
and the structure of the LbL amplitude",
Hadronic Contributions to New Physics Searches (HC2NP), Tenerife, Spain  September 6, 2016
"DysonSchwinger calculations for hadron spectroscopy and structure",
Light Cone 2016, Lisbon, Portugal  August 29, 2016
"From QCD's npoint functions to nucleon resonances",
XIIth Quark Confinement and the Hadron Spectrum, Thessaloniki, Greece  August 8, 2016
"Baryon spectroscopy in the DysonSchwinger approach",
Gordon Research Conference on Photonuclear Reactions,
Holderness, New Hampshire, USA  April 20, 2016
"Compton scattering and DysonSchwinger equations",
Probing transverse nucleon structure at high momentum transfer,
ECT*, Trento, Italy  March 14, 2016
"Hadron phenomenology with DysonSchwinger and BetheSalpeter equations", DPG Meeting, Darmstadt, Germany  March 3, 2016
"From quarks and gluons to the structure of hadrons",
Colloquium, College of William & Mary, Virginia, USA  March 2, 2016
"From quarks and gluons to the structure of hadrons",
Seminar, Jefferson Lab, Virginia, USA  January 22, 2016
"Form factors and scattering amplitudes in Euclidean space",
MiniWorkshop on Connecting Formulations in Euclidean and Minkowski Space,
IST, Lisbon, Portugal  October 22, 2015
"The light scalar mesons as tetraquarks",
HIC for FAIR PAC Meeting, GSI, Darmstadt, Germany  October 14, 2015
"Nucleon transition form factors in the DSE/Faddeev framework",
Nucleon resonances: from photoproduction to high photon virtualities,
ECT*, Trento, Italy  September 23, 2015
"Nucleon electromagnetic properties in the covariant Faddeev approach",
Light Cone 2015, Frascati, Rome, Italy  September 20, 2015
"Nucleon structure properties with quarks and gluons",
37th International School of Nuclear Physics, Erice, Sicily, Italy  July 21, 2015
"Tetraquarks in a BetheSalpeter approach",
EMMI Workshop: AntiMatter, hypermatter and exotica production at the LHC,
CERN, Geneva, Switzerland  June 11, 2015
"The light scalar mesons as tetraquarks",
Nuclear Physics Colloquium, Frankfurt, Germany  May 22, 2015
"Tetraquarks from the fourbody BetheSalpeter equation",
21st International Conference on FewBody Problems in Physics, Chicago, USA  March 27, 2015
"Tetraquarks from the BetheSalpeter equation",
Bound states in QCD and beyond, St. Goar, Germany  March 11, 2015
"Tetraquarks from the BetheSalpeter equation",
Excited QCD 2015, Tatranska Lomnica, Slovakia  October 2, 2014
"Nucleon Compton scattering and the muon g2",
NPQCD 2014, Punta Umbria, Huelva, Spain  September 30, 2014
"Hadron physics in the DysonSchwinger approach",
MesonNet Meeting, INFN, Frascati, Italy  September 9, 2014
"The muon g2: DSE status on lightbylight",
Quark Confinement and the Hadron Spectrum XI, St. Petersburg, Russia  September 6, 2014
"The muon g2 in the DysonSchwinger approach",
Caucasian Mathematics Conference, Tbilisi, Georgia  August 3031, 2014
"Introduction to Feynman diagrams",
Hadron Physics Summer PreSchool, Schloss Rauischholzhausen, Germany  May 9, 2014
"Towards higher npoint functions: the threegluon vertex
and lightbylight scattering",
Many manifestations of nonperturbative QCD, Ubatuba, Sao Paulo, Brazil  February 7, 2014
"Probing nucleons with photons at the quark level",
Excited QCD 2014, Sarajevo, Bosnia  January 17, 2014
"Nucleon polarizabilities in the DysonSchwinger approach",
Workshop on Hadrons from Quarks and Gluons, Hirschegg, Austria  December 19, 2013
"From quarks and gluons to baryon properties",
Seminar, University of Jena, Germany  October 25, 2013
"Nucleon polarizabilities in the DysonSchwinger approach",
Workshop and School on the BoundState Problem in Continuum QCD,
Hefei, China  October 12, 2013
"Hadron physics in the DysonSchwinger approach",
EMMI Rapid Reaction Task Force, GSI, Germany  September 5, 2013
"Nucleon Compton Scattering in the DysonSchwinger approach",
QCDTNTIII: From quarks and gluons to hadronic matter: A bridge too far?
Trento, Italy  August 1, 2013
"Nucleon Compton Scattering from the DysonSchwinger perspective",
Workshop on Compton Scattering off Protons and Light Nuclei, Trento, Italy  June 5, 2013
"From quarks and gluons to nucleon Compton scattering",
Seminar, University of Graz, Austria  May 28, 2013
"Hadron physics in the DysonSchwinger approach",
Technical University of Vienna, Austria  May 23, 2013
"Nucleon Compton scattering at the quarkgluon level",
I3HP Workshop, Graz, Austria  March 2528, 2013
"Hadron physics and DysonSchwinger equations",
Lecture series given at the 5th International Meeting on
Particles and Fields, Lahore, Pakistan  Oct 8, 2012
"Nucleon Compton scattering in the DysonSchwinger approach"
Xth Quark Confinement and the Hadron Spectrum, Munich, Germany  Oct 4, 2012
"Nucleon Compton scattering in the Faddeev approach"
Workshop on Nonperturbative QCD (QCDNP 2012), Matalascanas, Huelva, Spain  Sept 20, 2012
"Nucleon Compton scattering in the DysonSchwinger approach"
62nd OEPG meeting, Graz, Austria  Sept 5, 2012
"Hadron phenomenology in the DysonSchwinger approach"
FAIRNESS, Hersonissos, Greece  May 2, 2012
"Baryon properties from DysonSchwinger equations"
Many manifestations of nonperturbative QCD, Caraguatatuba, Sao Paulo, Brazil  Mar 13, 2012
"Hadron properties from DysonSchwinger equations"
Workshop on Confinement Physics, Jefferson Lab, USA  Feb 26, 2012
"Hadron physics from the DysonSchwinger approach"
50. Internationale Universitätswochen für Theoretische Physik, Schladming, Austria  Dec 14, 2011
"PANDA physics from the DysonSchwinger approach"
PANDA Collaboration Meeting, GSI, Darmstadt, Germany  Oct 11, 2011
"Baryon properties and reactions for PANDA"
HIC for FAIR  PAC Meeting, Darmstadt, Germany  Sept 20, 2011
"From quarks and gluons to baryon form factors"
International School of Nuclear Physics, Erice, Italy  Sept 8, 2011
"Baryon form factors from DysonSchwinger equations"
QCDTNTII, Trento, Italy  May 4, 2011
"Nucleon electromagnetic form factors from the covariant Faddeev equation"
AustriaCroatiaHungary Triangle Workshop Strong Interactions in Quantum Field Theory, Fürstenfeld, Austria  March 3, 2011
"Hadron phenomenology from the boundstate approach"
49. Internationale Universitätswochen für Theoretische Physik, Schladming, Austria  Nov. 10, 2010
"Baryons from the Faddeev equation"
Workshop on AdS/CFT and Novel Approaches to Hadron and Heavy Ion Physics,
KITPC, Beijing, China  Nov. 5, 2010
"Hadron properties from QCD boundstate equations"
Seminar, Institute of Theoretical Physics, Giessen, Germany  Sept 2, 2010
"The nucleon from a Poincarécovariant Faddeev equation"
Confinement 9 (Quark Confinement and the Hadron Spectrum), Madrid, Spain  June 19, 2010
"Baryon properties from a covariant Faddeev equation"
Seminar, University of Washington, Seattle, USA  June 2, 2010
"Baryons beyond the quarkdiquark model"
MENU 2010, Williamsburg, Virginia, USA  March 18, 2010
"Die Masse des Nukleons aus einer kovarianten Faddeevgleichung"
74. Jahrestagung der DPG, Bonn, Germany  March 3, 2010
"Nucleon properties from a covariant threequark Faddeev equation"
48. Internationale Universitätswochen für Theoretische Physik, Schladming, Austria  Nov. 17, 2009
"Hadron properties from QCD boundstate equations"
Seminar, Institute of Nuclear Physics, Darmstadt, Germany  Sept. 4, 2009
"Solving the threequark equation for the nucleon"
FB 19 (FewBody Problems in Physics), Bonn, Germany  April 16, 2009
"The nucleon beyond the quarkdiquark model"
Workshop on Strong Interactions in Quantum Field Theory, Fürstenfeld, Austria  Sept. 3, 2008
"Meson and nucleon properties from DSQCD"
Confinement 8 (Quark Confinement and the Hadron Spectrum), Mainz, Germany  May 20, 2008
"The quark core of mesons and nucleons from DSQCD"
Workshop on Hadron Electromagnetic Form Factors, Trento, Italy  April 4, 2008
"QCD Modeling of Nucleons and Mesons"
Seminar, Kent State University, Kent, Ohio, USA  Sept 24, 2007
"The nucleon as a QCD bound state in a Faddeev approach"
FAKT 07, Langenlois, Austria  Sept 19, 2007
"The nucleon as a QCD bound state in a Faddeev approach"
Quarks in Hadrons and Nuclei, Erice, Italy  March 14, 2007
"Studying the nucleon in a DysonSchwinger approach"
Confinement: connecting the light and heavyquark domains, Trento, Italy  Sept. 18, 2006
"The nucleon in a covariant Faddeev framework"
FAKT 06, Maria Lankowitz, Austria  Sept. 12, 2006
"Towards a realistic description of the nucleon"
"QCD: Facts and Prospects", Oberwölz, Austria  May 24, 2006
"The nucleon quark core in a covariant Faddeev approach"
Seminar, Peking University, Beijing, China  March 16, 2006
"The nucleon quark core in a covariant Faddeev approach"
44. Universitätswochen für Theoretische Physik, Schladming, Austria  March 9, 2006
"Form factors of a relativistic threequark state"
Seminar, Technical University of Munich, Garching, Germany
Links
 Nonperturbative Phenomena in QCD, Giessen
 Institute
of Nuclear Physics, Darmstadt
 Strong
Interactions in Continuum QFT, Graz
 Argonne Physics Division, Argonne