Hagop Sazdjian

 (Lien annuaire IN2P3)

• Professeur émérite à l’Université Paris-Saclay, Orsay.
• Professor emeritus at Université Paris-Saclay, Orsay.
• Bureau : A133, Bât. 100
• tél. : +33 (0)169157925
• email : sazdjian@ijclab.in2p3.fr
• ORCID : 0000-0002-2958-0120

Thèmes de Recherche

•  Équations d’état lié relativistes, théorie des contraintes.
•  Théorie des perturbations chirale.
•  Atomes hadroniques.
•  Fonctions de Green invariantes de jauge et boucles de Wilson en QCD.
•  Tetraquarks.

Research interests

•  Relativistic bound state equations, constraint theory.
•  Chiral perturbation theory.
•  Hadronic atoms.
•  Gauge invariant Green’s functions and Wilson loops in QCD.
•  Tetraquarks.

Publications

Bases de données : INSPIRE, ArXiv, HAL-IN2P3

Publications récentes – Recent publications

• H. Sazdjian, The interplay between compact and molecular structures in tetraquarks, arXiv:2202.01081 [hep-ph], Symmetry 14 (2022) 515 (1-34).
• W. Lucha, D. Melikhov, H. Sazdjian, Tetraquarks in large-N_c QCD, arXiv:2102.02542 [hep-ph], Prog. Part. Nucl. Phys. 120 (2021) 103867 (1-54).
• J. Carbonell, V. Karmanov, H. Sazdjian, Hybrid nature of the abnormal solutions of the Bethe-Salpeter equation in the Wick-Cutkosky model, arXiv:2101.03566 [hep-ph], Eur. Phys. J. C 81 (2021) 50 (1-22).
• W. Lucha, D. Melikhov, H. Sazdjian, OPE and quark-hadron duality for two-point functions of tetraquark currents in 1/N_c expansion, arXiv:2012.03894 [hep-ph], Phys. Rev. D 103 (2021) 014012 (1-10).
• W. Lucha, D. Melikhov, H. Sazdjian, Tetraquark-adequate QCD sum rules for quark-exchange processes, arXiv:1909.06324 [hep-ph], Phys. Rev D 100 (2019) 074029 (1-8).
• W. Lucha, D. Melikhov, H. Sazdjian, Cluster reducibility of multiquark operators, arXiv:1908.10164 [hep-ph], Phys. Rev. D 100 (2019) 094017 (1-8).
• W. Lucha, D. Melikhov, H. Sazdjian, Tetraquark-adequate formulation of QCD sum rules,W. Lucha, D. Melikhov,arXiv : 1901.03881 [hep-ph], Phys. Rev. D 100 (2019) 014010 (1-6).
• H. Sazdjian, Are there narrow flavor-exotic tetraquarks at large-N_c QCD ?, arXiv : 1810.09986 [hep-ph], Phys. Rev. D 98 (2018) 094011 (1-7).
• W. Lucha, D. Melikhov, H. Sazdjian, Tetraquark and two-meson states at large N_c, arXiv : 1710.08316 [hep-ph], Eur. Phys. J. C 77 (2017) 866 (1-11).
• W. Lucha, D. Melikhov, H. Sazdjian, Narrow exotic tetraquark mesons in large-N_c QCD, arXiv : 1706.06003 [hep-ph], Phys. Rev. D 96 (2017) 014022 (1-4).
• H. Sazdjian, Gauge invariant approach to quark dynamics, arXiv : 1511.06536 [hep-ph], Front. Phys. 11 (2016) 111101 (1-11).
• W. Lucha, D. Melikhov, H. Sazdjian and S. Simula, Strong three-meson couplings of J/psi and eta_c, arXiv : 1506.09213 [hep-ph], Phys. Rev. D 93 (2016) 016004 (1-8).
• H. Sazdjian, Gauge invariant quark Green’s functions with polygonal Wilson lines, Phys. Part. Nucl. 45 (2014) 782-787.
•  N. Brambilla, S. Eidelman, P. Foka, S. Gardner, A.S. Kronfeld, et al, QCD and strongly coupled gauge theories : challenges and perspectives, arXiv:1404.3723 [hep-ph], Eur. Phys. J. C 74:2981 (2014) 1-241.
•  H. Sazdjian, Gauge invariant bound state equations for quark-antiquark systems in QCD, arXiv:1304.0961 [hep-ph] , Phys. Rev. D 88 (2013) 025034 (1-13).
•  H. Sazdjian, Spectral properties of the gauge invariant quark Green’s functions in two-dimensional QCD, arXiv : 1003.5099 [hep-ph], Phys. Rev. D 81 (2010) 114008 (1-16).
•  W. Lucha, D. Melikhov, H. Sazdjian and S. Simula, Effective continuum threshold for vacuum-to-bound-state correlators, arXiv : 0910.3164 [hep-ph], Phys. Rev. D 80 (2009) 114028 (1-6).
•  H. Sazdjian, Integral equation for gauge invariant quark two-point Green’s function in QCD, arXiv : 0709.0161 [hep-ph], Phys. Rev. D 77 (2008) 045028 (1-11).
•  H. Jallouli and H. Sazdjian, Energy and decay width of the pi-K atom, arXiv : hep-ph/0605253, Eur. Phys. J. C 48 (2006) 561-578.
•  F. Jugeau and H. Sazdjian, Bound state equation in the Wilson loop approach with minimal surfaces, arXiv : hep-ph/0305021, Nucl. Phys. B 670 (2003) 221-263.

Séminaires et Conférences – Seminars and Conferences

• Tetraquark properties at large N_c, Conference Light Cone 2019, École Polytechnique, Palaiseau, 16-20 September 2019, arXiv:1911.12591 [hep-ph], PoS LC2019 (2019) 078 (1-5).
• Tetraquarks at large Nc, Workshop Exotic hadrons : theory and experiment at lepton and hadron colliders, Shanghai, China, 25-27 June 2019.
• Large_N_c QCD and tetraquarks, Conference Quark Confinement and the Hadron Spectrum XIII, Maynooth University, Ireland, 1-6 August 2018, arXiv : 1811.07613 [hep-ph] ,PoS Confinement2018 (2018) 028 (1-12).
•  Tetraquark decay widths in large_N_c QCD, seminar at TUM, Garching, 11 May 2018.
• Narrow-width tetraquarks in large-N_c QCD, 6th International Conference on New Frontiers in Physics, Kolymbari, Crete, Greece, 17-29 August 2017, arXiv : 1711.07691 [hep-ph], EPJ Web of Conferences 182 (2018) 02111 (1-8).
• Introduction to chiral symmetry in QCD, Student Lectures, Conference Quark confinement and the hadron spectrum XII, Thessaloniki, Greece, 28 August 2016, arXiv : 1612.04078 [hep-ph], EPJ Web of Conferences 137 (2017) 02001 (1-19).
• Gauge invariant approach to quark dynamics with polygonal Wilson lines, Conference Hadron Structure and QCD, Gatchina, Saint-Petersburg, 27 June – 1 July 2016.
• On the role of dynamical quark mass generation in chiral symmetry breaking in QCD, International Conference QCD 15, Montpellier, 29 June – 3 July 2015, arXiv : 1510.01508 [hep-ph], Nucl. Part. Phys. Proc. 270-272 (2016) 93-97. 
• Analogs of Dyson-Schwinger equations for gauge invariant quark Green’s functions, Workshop Dyson-Schwinger equations in modern mathematics and physics, ECT*, Trento, 22-26 September 2014.
• The 1/N expansion method in quantum field theory, 3d International School in Symmetry in integrable systems and nuclear physics, Tsakhkadzor, Armenia, 3-13 July 2013, HAL:cel-01152586, arXiv : 1512.06784 [hep-th].
• Gauge invariant quarkonium bound state equation, Workshop QCD@Work, Lecce, 18-21 June 2012.
• The gauge invariant quark Green’s function in two-dimensional QCD, Workshop QCD@Work, Martina Franca, 20-23 June 2010.
•  Integral equation for gauge invariant quark Green’s function, Seminar at Milano University, Physics Department, 27 February 2008.
•  Quarkonium bound state equation in the Wilson loop approach with minimal surfaces, Seminar at ECM, Barcelona University, 19 April 2007.
•  Energy and decay width of the pi-K atom, Workshop Heavy quarkonium and related heavy quark states, Trento, 17-31 August 2006.

Enseignement – Teaching

Licence L1 et L2.

•  S3 MI, Phys 272, Ondes. Polycopié du cours.
•  S3 MIAS, Physique statistique et thermodynamique. Polycopié du cours.
•  S3 BIOCONCOURS, Phys 296, Thermodynamique.
•  S1 MPI-PCST, Phys 101, Lois d’évolution en physique. Résumé du cours.