Address:

LIP Lisboa
Avenida Prof. Gama Pinto, 2
1649-003 Lisboa

Departamento de Fisica
Instituto Superior Técnico
Avenida Rovisco Pais, 1
1049-001 Lisboa
Portugal

gernot.eichmann (at) tecnico.ulisboa.pt



Research interests

My research interests involve non-perturbative QCD, Dyson-Schwinger equations, and the application of bound-state equations (Bethe-Salpeter and Faddeev equations) to hadron properties with emphasis on baryons, tetraquarks and multiquark systems.

Biographical sketch

Quick links

Students

Publications

The publication list is also available from INSPIRE.

  1. Theory introduction to baryon spectroscopy
    Gernot Eichmann
    e-Print: 2202.13378 [hep-ph].

  2. Going to the light front with contour deformations
    Gernot Eichmann, Eduardo Ferreira, Alfred Stadler
    Phys. Rev. D 105 (2022) 3, 034009
    e-Print: 2112.04858 [hep-ph].

  3. On mass generation in Landau-gauge Yang-Mills theory
    Gernot Eichmann, Jan M. Pawlowski, João M. Silva
    Phys. Rev. D 104 (2021) 11, 114016
    e-Print: 2107.05352 [hep-ph].

  4. Four-quark states from functional methods
    Gernot Eichmann, Christian S. Fischer, Walter Heupel, Nico Santowsky, Paul C. Wallbott, Few Body Syst. 61 (2020) 4, 38
    e-Print: 2008.10240 [hep-ph].

  5. Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
    M. Yu. Barabanov, M. A. Bedolla, W. K. Brooks, G. D. Cates, C. Chen et al.
    Prog. Part. Nucl. Phys. 116 (2021) 103835
    e-Print: 2008.07630 [hep-ph].

  6. The σ-meson: four-quark vs. two-quark components and decay width in a Bethe-Salpeter approach
    Nico Santowsky, Gernot Eichmann, Christian S. Fischer, Paul C. Wallbott, Richard Williams, Phys. Rev. D 102 (2020) 5, 056014
    e-Print: 2007.06495 [hep-ph].

  7. The anomalous magnetic moment of the muon in the Standard Model
    T. Aoyama, N. Asmussen, M. Benayoun, J. Bijnens, T. Blum et al.
    Phys. Rept. 887 (2020) 1-166
    e-Print: 2006.04822 [hep-ph].

  8. Disentangling different structures in heavy-light four-quark states
    Paul C. Wallbott, Gernot Eichmann, Christian S. Fischer
    Accepted for publication in Phys. Rev. D Rapid Comm.
    Phys. Rev.D 102 (2020) 5, 051501
    e-Print: 2003.12407 [hep-ph].

  9. Kaon-box contribution to the anomalous magnetic moment of the muon
    Gernot Eichmann, Christian S. Fischer, Richard Williams
    Phys.Rev. D101 (2020) no.5, 054015
    e-Print: 1910.06795 [hep-ph].

  10. Scattering amplitudes and contour deformations
    Gernot Eichmann, Pedro Duarte, M. T. Peña, Alfred Stadler
    Phys.Rev. D100 (2019) no.9, 094001
    e-Print: 1907.05402 [hep-ph].

  11. X(3872) as a four-quark state in a Dyson-Schwinger/
    Bethe-Salpeter approach

    Paul C. Wallbott, Gernot Eichmann, Christian S. Fischer
    Phys.Rev. D100 (2019) no.1, 014033
    e-Print: 1905.02615 [hep-ph].

  12. Single pseudoscalar meson pole and pion box contributions
    to the anomalous magnetic moment of the muon

    Gernot Eichmann, Christian S. Fischer, Esther Weil, Richard Williams
    Phys.Lett. B797 (2019) 134855
    e-Print: 1903.10844 [hep-ph].

  13. Baryon Structure and reactions from Dyson-Schwinger equations
    Gernot Eichmann, Christian S. Fischer
    Few Body Syst. 60 (2019) no.1, 2.

  14. Nucleon resonances in Compton scattering
    Gernot Eichmann, Gilberto Ramalho
    Phys.Rev. D98 (2018) no.9, 093007
    e-Print: 1806.04579 [hep-ph].

  15. Electromagnetic decays of the neutral pion
    Esther Weil, Gernot Eichmann, Christian S. Fischer, Richard Williams
    Phys.Rev. D96 (2017) no.1, 014021
    e-Print: 1704.06046 [hep-ph].

  16. On the large-Q2 behavior of the pion transition form factor
    Gernot Eichmann, Christian S. Fischer, Esther Weil, Richard Williams
    Phys.Lett. B774 (2017) 425-429
    e-Print: 1704.05774 [hep-ph].

  17. More about the light baryon spectrum
    Gernot Eichmann
    Few Body Syst. 58 (2017) no. 2, 81
    e-Print: 1611.10118 [hep-ph].

  18. On light baryons and their excitations
    Gernot Eichmann, Christian S. Fischer, Helios Sanchis-Alepuz
    Phys. Rev. D94 (2016) 9, 094033
    e-Print: 1607.05748 [hep-ph].

  19. Baryons as relativistic three-quark bound states
    Gernot Eichmann, Helios Sanchis-Alepuz, Richard Williams, Reinhard Alkofer,
    Christian S. Fischer. Prog. Part. Nucl. Phys. 91 (2016) 1-100
    e-Print: 1606.09602 [hep-ph].

  20. Progress in the calculation of nucleon transition form factors
    Gernot Eichmann
    Few Body Syst. 57 (2016) no. 10, 965-973
    e-Print: 1602.03462 [hep-ph].

  21. Towards a microscopic understanding of nucleon polarizabilities
    Gernot Eichmann
    Few Body Syst. 57 (2016) no. 7, 541-547
    e-Print: 1601.04154 [hep-ph].

  22. 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
    e-Print: 1509.02082 [hep-ph].

  23. The light scalar mesons as tetraquarks
    Gernot Eichmann, Christian S. Fischer, Walter Heupel
    Phys. Lett. B753 (2016) 282-287
    e-Print: 1508.07178 [hep-ph].

  24. Four-point functions and the permutation group S4
    Gernot Eichmann, Christian S. Fischer, Walter Heupel
    Phys. Rev. D92 (2015) 5, 056005
    e-Print: 1505.06336 [hep-ph].

  25. Electromagnetic baryon form factors in the Poincaré-covariant Faddeev approach
    Reinhard Alkofer, Gernot Eichmann, Helios Sanchis-Alepuz, Richard Williams
    Hyperfine Interact. 234 (2015) 1-3, 149-154
    e-Print: 1412.8413 [hep-ph].

  26. The three-gluon vertex in Landau gauge
    Gernot Eichmann, Richard Williams, Reinhard Alkofer, Milan Vujinovic
    Phys. Rev. D89, 105014 (2014)
    e-Print: 1402.1365 [hep-ph].

  27. Nucleon Compton scattering in the Dyson-Schwinger approach
    Gernot Eichmann, Christian S. Fischer
    Phys. Rev. D87, 036006 (2013)
    e-Print: 1212.1761 [hep-ph].

  28. Tetraquark bound states in a Bethe-Salpeter approach
    Walter Heupel, Gernot Eichmann, Christian S. Fischer
    Phys.Lett. B718, 545 (2012)
    e-Print: 1206.5129 [hep-ph].

  29. Nucleon to Delta electromagnetic transition in the Dyson-Schwinger approach
    Gernot Eichmann, Diana Nicmorus
    Phys. Rev. D85, 093004 (2012)
    e-Print: 1112.2232 [hep-ph].

  30. Nucleon axial and pseudoscalar form factors
    from the covariant Faddeev equation

    Gernot Eichmann, Christian S. Fischer
    Eur. Phys. J. A 48 (2011) 9
    e-Print: 1111.2614 [hep-ph].

  31. Unified description of hadron-photon and hadron-meson scattering
    in the Dyson-Schwinger approach

    Gernot Eichmann, Christian S. Fischer
    Phys. Rev. D85, 034015 (2012)
    e-Print: 1111.0197 [hep-ph].

  32. Delta and Omega masses in a three-quark covariant Faddeev approach
    Helios Sanchis-Alepuz, Gernot Eichmann, Selym Villalba-Chavez, Reinhard Alkofer
    Phys. Rev. D84, 096003 (2011)
    e-Print: 1109.0199 [hep-ph].

  33. Hadronic decays of mesons and baryons in the Dyson-Schwinger approach
    Valentin Mader, Gernot Eichmann, Martina Blank, Andreas Krassnigg
    Phys. Rev. D84, 034012 (2011)
    e-Print: 1106.3159 [hep-ph].

  34. Nucleon electromagnetic form factors from the covariant Faddeev equation
    Gernot Eichmann
    Phys. Rev. D84, 014014 (2011)
    e-Print: 1104.4505 [hep-ph].

  35. Delta and Omega electromagnetic form factors in a
    Dyson-Schwinger/Bethe-Salpeter approach

    Diana Nicmorus, Gernot Eichmann, Reinhard Alkofer
    Phys.Rev. D82, 114017 (2010)
    e-Print: 1008.3184 [hep-ph].

  36. Delta properties in the rainbow-ladder truncation
    of Dyson-Schwinger equations

    D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer.
    Few Body Syst. 49, 255-261 (2011)
    e-Print: 1008.4149 [hep-ph].

  37. Nucleon mass from a covariant three-quark Faddeev equation
    Gernot Eichmann, Reinhard Alkofer, Andreas Krassnigg, Diana Nicmorus
    Phys. Rev. Lett. 104, 201601 (2010)
    e-Print: 0912.2246 [hep-ph].

  38. Delta-baryon mass in a covariant Faddeev approach
    D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer.
    Phys. Rev. D80, 054028 (2009)
    e-Print: 0812.1665 [hep-ph].

  39. Survey of nucleon electromagnetic form factors
    I.C. Cloet, G. Eichmann, B. El-Bennich, T. Klahn, C.D. Roberts.
    Few Body Syst. 46, 1-36 (2009)
    e-Print: 0812.0416 [nucl-th].

  40. 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)
    e-Print: 0810.1222 [nucl-th].

  41. 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, 91-113 (2008)
    e-Print: 0804.3118 [nucl-th].

  42. Perspective on rainbow-ladder truncation
    G. Eichmann, R. Alkofer, I. C. Cloet, A. Krassnigg, C. D. Roberts.
    Phys. Rev. C77, 042202(R) (2008)
    e-Print: 0802.1948 [nucl-th].

  43. A covariant view on the nucleons' quark core
    G. Eichmann, A. Krassnigg, M. Schwinzerl and R. Alkofer.
    Annals Phys. 323, 2505-2553 (2008)
    e-Print: 0712.2666 [hep-ph].

Conference proceedings:

  1. Studying mass generation for gluons
    Gernot Eichmann, Jan M. Pawlowski
    e-Print: 2112.08058 [hep-ph].

  2. Hadron Spectroscopy and Structure in the Dyson-Schwinger Approach
    Gernot Eichmann
    Springer Proc. Phys. 238 (2020) 783-792.

  3. Towards Heavy-Light Axialvector Tetraquarks in a
    Dyson-Schwinger/Bethe--Salpeter Approach

    Paul C. Wallbott, Gernot Eichmann, Christian S. Fischer
    Acta Phys. Polon. Supp. 13 (2020) 139.

  4. Towards resonance properties in the Dyson-Schwinger approach
    Gernot Eichmann
    PoS LC2019 (2019) 003.
    e-Print: 1912.08873 [hep-ph].

  5. Towards lattice-assisted hadron physics calculations based on
    QCD n-point functions

    André Sternbeck, Milena Leutnant, Gernot Eichmann
    PoS LATTICE2018 (2019) 068.
    e-Print: 1904.10705 [hep-lat].

  6. Light tetraquarks in a Dyson-Schwinger/Bethe-Salpeter approach
    Paul C. Wallbott, Gernot Eichmann, Christian S. Fischer
    J. Phys. Conf. Ser. 1024 (2018) 1, 012035.

  7. Overview of multiquark states
    Christian S. Fischer, Gernot Eichmann
    PoS Hadron2017 (2018) 007.

  8. Electromagnetic decays of the neutral pion investigated in the Dyson-Schwinger formalism
    Esther Weil, Gernot Eichmann, Christian S. Fischer, Richard Williams
    J. Phys. Conf. Ser. 1024 (2018) 1, 012035.
    e-Print: 1710.08169 [hep-ph].

  9. Tetraquarks from the Bethe-Salpeter equation
    Gernot Eichmann, Christian S. Fischer, Walter Heupel
    Acta Phys.Polon.Supp. 8 (2015) 425
    e-Print: 1507.05022 [hep-ph].

  10. Hadron properties from the Dyson-Schwinger approach
    Gernot Eichmann
    MesonNet 2014 International Workshop. Mini-proceedings
    e-Print: 1412.5451 [nucl-ex].

  11. The muon g-2: Dyson-Schwinger status on hadronic light-by-light scattering
    Gernot Eichmann, Christian S. Fischer, Walter Heupel, Richard Williams
    Proceedings of Confinement XI
    AIP Conf. Proc. 1701, 040004 (2016).
    e-Print: 1411.7876 [hep-ph].

  12. Non-perturbative features of the three-gluon 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.
    e-Print: 1404.4474 [hep-ph].

  13. Probing nucleons with photons at the quark level
    Gernot Eichmann
    Proceedings of Excited QCD 2014
    Acta Phys. Polon. Supp. 7 (2014) 3, 597.
    e-Print: 1404.4149 [hep-ph].

  14. On propagators and three-point functions in Landau gauge QCD
    and QCD-like theories

    Reinhard Alkofer, Gernot Eichmann, Christian S. Fischer, Markus Hopfer,
    Milan Vujinovic, Richard Williams, Andreas Windisch
    PoS QCD-TNT-III (2013) 003
    e-Print: 1405.7310 [hep-ph].

  15. The role of pions as virtual constituents of light bound states
    Walter Heupel, Stanislav Kubrak, Gernot Eichmann, Christian Fischer
    PoS Bormio2013 (2013) 065
    e-Print: 1305.0650 [hep-ph].

  16. Hadron phenomenology in the Dyson-Schwinger approach
    Gernot Eichmann
    Proceedings of FAIRNESS 2012
    J. Phys. Conf. Ser. 426 (2013) 012014.

  17. Nucleon Compton scattering from the Dyson-Schwinger perspective
    Gernot Eichmann, Christian S. Fischer
    PoS ConfinementX (2012) 090
    e-Print: 1301.1194 [hep-ph].

  18. 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.

  19. Baryon form factors from Dyson-Schwinger equations
    Gernot Eichmann
    PoS QCD-TNT-II (2011) 017
    e-Print: 1112.4888 [hep-ph].

  20. Model comparison of Delta and Omega masses
    in a covariant Faddeev approach

    H. Sanchis-Alepuz, R. Alkofer, G. Eichmann, R. Williams.
    PoS QCD-TNT-II (2011) 041
    e-Print: 1112.3214 [hep-ph].

  21. On baryon properties from a covariant Faddeev approach
    H. Sanchis-Alepuz, R. Alkofer, G. Eichmann, S. Villalba-Chavez.
    PoS LC 2010 018 (2010)
    e-Print: 1010.6183 [hep-ph].

  22. Baryons in and beyond the quark-diquark model
    G. Eichmann, R. Alkofer, C. S. Fischer, A. Krassnigg, D. Nicmorus.
    AIP Conf. Proc. 1374 (2011) 617-620
    e-Print: 1010.0206 [hep-ph].

  23. Hadron properties from QCD bound-state equations: A status report
    R. Alkofer, G. Eichmann, A. Krassnigg, D. Nicmorus.
    Chin. Phys. C34, 1175-1180 (2010)
    e-Print: 0912.3105 [hep-ph].

  24. Covariant solution of the three-quark problem in quantum field theory:
    the nucleon

    G. Eichmann, R. Alkofer, A. Krassnigg, D. Nicmorus
    EPJ Web Conf. 3:03028 (2010)
    e-Print: 0912.2876 [hep-ph].

  25. Meson and nucleon properties from Dyson-Schwinger QCD
    G. Eichmann, R. Alkofer, A. Krassnigg, D. Nicmorus.
    PoS CONFINEMENT8 077 (2008)
    e-Print: 0812.3183 [hep-ph].

  26. Faddeev equations: A view of baryon properties
    D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer.
    PoS CONFINEMENT8 052 (2008)
    e-Print: 0812.2966 [hep-ph].

  27. The nucleon as a QCD bound state in a Faddeev approach
    G. Eichmann, A. Krassnigg, M. Schwinzerl and R. Alkofer.
    Prog. Part. Nucl. Phys. 61:84-85 (2008)

Teaching

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