Annales Henri Poincaré

, Volume 4, Issue 1, pp 85–126 | Cite as

Complex Angular Momentum Diagonalization of the Bethe-Salpeter Structure in General Quantum Field Theory

  • J. Bros
  • G.A. Viano
Original article


The Complex Angular Momentum (CAM) representation of (scalar) fourpoint functions has been previously established starting from the general principles of local relativistic Quantum Field Theory (QFT). Here, we carry out the diagonalization of the general t-channel Bethe-Salpeter (BS) structure of four-point functions in the corresponding CAM variable λt, for all negative values of the squared-energy variable t. This diagonalization is closely related to the existence of BS-equations for the absorptive parts in the crossed channels, interpreted as convolution equations with spectral properties. The production of Regge poles equipped with factorized residues involving Euclidean three-point functions appears as conceptually built-in in the analytic axiomatic framework of QFT. The existence of leading Reggeon terms governing the asymptotic behaviour of the four-point function at fixed t is strictly conditioned by the asymptotic behaviour of a global Bethe-Salpeter kernel of the theory.


Quantum Field Theory Asymptotic Behaviour General Principle Spectral Property Regge Pole 


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Copyright information

© Birkhäuser Verlag Basel, 2003

Authors and Affiliations

  • J. Bros
    • 1
  • G.A. Viano
    • 2
  1. 1.Service de Physique Théorique, CEA-Saclay, F-91191 Gif-sur-Yvette, Cedex, France, e-mail: bros@spht.saclay.cea.frFrance
  2. 2.Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Dipartimento di Fisica dell'Università di Genova, I-16146 Genova, e-mail: viano@ge.infn.itItaly

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