https://doi.org/10.1140/epja/i2005-10105-4
Original Article
The generalised relativistic Lindhard functions
1
Dipartimento di Fisica Teorica, Università di Torino, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Torino, Italy
2
Dipartimento di Fisica, Università di Genova, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Genova, Italy
* e-mail: barbaro@to.infn.it
Received:
3
April
2005
Accepted:
14
June
2005
Published online:
5
September
2005
We present here analytic expressions for the generalised Lindhard function, also referred to as Fermi gas polarisation propagator, in a relativistic kinematic framework and in the presence of various resonances and vertices. Particular attention is payed to its real part, since it gives rise to substantial difficulties in the definition of the currents entering the dynamics.
PACS: 21.60.-n Nuclear structure models and methods – / 21.30.Fe Forces in hadronic systems and effective interactions – / 24.10.Cn Many-body theory –
© Società Italiana di Fisica and Springer-Verlag, 2005
