Research Interests

Mathematical Physics, Dirac quntization, Faddeev-Jackiw quantization, Hamiltonian formalism.
Null string theory
Numerical calculations in high energy physics, Feynman graph.
Publications

Here is my list of publications, last updated June 2016. (Note: author list convention is alphabetization.)

1) Neutralino-neutralino annihilation to gamma Z in MSSM.
By Theodoros Diakonidis, Georgios J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.

2) Neutralino-neutralino annihilation to gamma Z in MSSM.
By Th. Diakonidis, G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0602049].
10.1103/PhysRevD.73.073003.
Phys.Rev. D73 (2006) 073003.

3) Single neutralino production at CERN LHC.
By G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0411366].
10.1103/PhysRevD.71.075012.
Phys.Rev. D71 (2005) 075012.

4) Electron spectra in the ionization of atoms by neutrinos.
By G.J. Gounaris, E.A. Paschos, P.I. Porfyriadis.
[hep-ph/0409053].
10.1103/PhysRevD.70.113008.
Phys.Rev. D70 (2004) 113008.

5) Neutralino pair production at CERN LHC.
By G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0404162].
10.1103/PhysRevD.70.033011.
Phys.Rev. D70 (2004) 033011.

6) Neutralino pair production in a gamma gamma collider.
By G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0311076].
10.1140/epjc/s2003-01520-x.
Eur.Phys.J. C32 (2004) 561-574.

7) Neutralino-neutralino annihilation to photon and gluon pairs in mssm models.
By G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0309032].
10.1103/PhysRevD.69.075007.
Phys.Rev. D69 (2004) 075007.

8) The Ionization of H, He or Ne atoms using neutrinos or anti-neutrinos at keV energies.
By G.J. Gounaris, E.A. Paschos, P.I. Porfyriadis.
[hep-ph/0109183].
10.1016/S0370-2693(01)01415-0.
Phys.Lett. B525 (2002) 63-70.

9) A description of the neutralino observables in terms of projectors.
By G.J. Gounaris, C. Le Mouel, P.I. Porfyriadis.
[hep-ph/0107249].
10.1103/PhysRevD.65.035002.
Phys.Rev. D65 (2002) 035002.

10) The Processes gamma gamma ---> ZH in SM and MSSM.
By G.J. Gounaris, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0103135].
10.1007/s100520100684.
Eur.Phys.J. C20 (2001) 659-675.

11) The Heavy neutral Higgs signature in the gamma gamma ---> Z Z process.
By Georgios J. Gounaris, P.I. Porfyriadis, F.M. Renard.
[hep-ph/0010006].
10.1007/s100520100589.
Eur.Phys.J. C19 (2001) 57-76.

12) The gamma gamma ---> A0 A0 process at a gamma gamma collider.
By G.J. Gounaris, P.I. Porfyriadis.
[hep-ph/0007110].
10.1007/s100520000520.
Eur.Phys.J. C18 (2000) 181-193.

13) The gamma gamma ---> Z Z process and the search for virtual SUSY effects at a gamma gamma collider.
By G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/9909243].
10.1007/s100520000307.
Eur.Phys.J. C13 (2000) 79-97.

14) The gamma gamma ---> gamma Z process at high-energies and the search for virtual SUSY effects.
By G.J. Gounaris, J. Layssac, P.I. Porfyriadis, F.M. Renard.
[hep-ph/9904450].
10.1007/s100520050774, 10.1007/s100529900131.
Eur.Phys.J. C10 (1999) 499-513.

15) The gamma gamma ---> gamma gamma process in the standard and SUSY models at high-energies.
By G.J. Gounaris, P.I. Porfyriadis, F.M. Renard.
[hep-ph/9902230].
10.1007/s100529900079.
Eur.Phys.J. C9 (1999) 673-686.

16) Light by light scattering at high-energy: A Tool to reveal new particles.
By G.J. Gounaris, P.I. Porfyriadis, F.M. Renard.
[hep-ph/9812378].
10.1016/S0370-2693(01)00773-0, 10.1016/S0370-2693(99)00171-9, 10.1016/S0370-2693(99)01051-5.
Phys.Lett. B452 (1999) 76-82, Erratum: Phys.Lett. B513 (2001) 431-431, Erratum: Phys.Lett. B464 (1999) 350-350.

17) Null strings in Kerr space-time.
By P.I. Porfyriadis, D. Papadopoulos.
[hep-th/9707183].
10.1016/S0370-2693(97)01395-6.
Phys.Lett. B417 (1998) 27-32.

18) String tension and the generation of the conformal anomaly.
By A. Nicolaidis, J.E. Paschalis, P.I. Porfyriadis.
[hep-th/9702185].
10.1103/PhysRevD.58.047901.
Phys.Rev. D58 (1998) 047901.

19) The Complete Faddeev-Jackiw treatment of the U EM (1) gauged SU(2) WZW model.
By J.E. Paschalis, P.I. Porfyriadis.
[hep-th/9607088].
10.1016/S0370-2693(96)01410-4.
Phys.Lett. B390 (1997) 197-204.

20) BFV analysis of the U-em(1) gauged SU(3) WZW model and the Faddeev-Jackiw approach.
By J.E. Paschalis, P.I. Porfyriadis.
[hep-th/9603196].

21) BRST analysis of the gauged SU(2) WZW model and Darboux's transformations.
By J.E. Paschalis, P.I. Porfyriadis.
[hep-th/9602164].
10.1007/s002880050347.
Z.Phys. C73 (1997) 557-561.

22) Hamiltonian reduction of the U-EM(1) gauged three flavor WZW model.
By J.E. Paschalis, P.I. Porfyriadis.
[hep-th/9506025].
10.1007/s002880050094.
Z.Phys. C70 (1996) 173-178.

23) Application of the Faddeev-Jackiw formalism to the gauged WZW model.
By J.E. Paschalis, P.I. Porfyriadis.
[hep-th/9504009].
10.1016/0370-2693(95)00746-8.
Phys.Lett. B355 (1995) 171-177.

24) Quark combinatorial counting and hadronic decays of J / psi particle. (In Russian).
By P.I. Porfiriadi.
Sov.J.Nucl.Phys. 47 (1988) 713-716, Yad.Fiz. 47 (1988) 1119-1124.

25) Relative Probabilities For Decays Of Hadrons Containing B Quarks In The Combinatorial Quark Counting Model. (in Russian).
By S.A. Voloshin, Yu.P. Nikitin, P.I. Porfirov.
Yad.Fiz. 39 (1984) 741-746.

26) Estimation Of The Branching Ratios For Hadronic Decays Of Heavy Resonance By Means Of The Quark Combinatorics. (in Russian).
By S.a. Voloshin, Yu.p. Nikitin, P.i. Porfirov.
Yad.Fiz. 37 (1983) 687-697.

27) Quark Combinatorial Analysis Of Multiple Production Of Hadrons At Finite Energies. Comparison With The Experimental Data. (in Russian).
By S.A. Voloshin, Yu.P. Nikitin, P.I. Porfirov.
Yad.Fiz. 35 (1982) 1259-1269.

28) Quark Combinatorial Analysis For Multiple Production Of Hadrons At Finite Energies. (in Russian).
By S.A. Voloshin, Yu.P. Nikitin, P.I. Porfirov.
Sov.J.Nucl.Phys. 35 (1982) 586, Yad.Fiz. 35 (1982) 1006-1015.

29) Quark - Partonic Cascades In Lepton Nuclear Interactions. (in Russian).
By S.A. Voloshin, Yu.P. Nikitin, P.I. Porfirov.
Yad.Fiz. 33 (1981) 1103-1106.

30) Quark - Parton Cascade In Nucleus And Secondary Hadron Spectra In Hadron Nucleus Collisions. (in Russian).
By S.A. Voloshin, Yu.P. Nikitin, P.I. Porfirov.
Yad.Fiz. 31 (1980) 762-775.

Comments: ppi@math.auth.gr