We examine the violation of linked-cluster property of the Schwinger model in the perturbative series by using partial resummation techniques. An effective chiral-invariant Lagrangian is introduced to study orders higher than the first. It is shown that the linked-cluster property is violated; thus partial resummation technique provides a route to interesting non-perturbative effects. We study also the case of QED with N fermions in 1+1 dimensions and we find that the chiral vacua are a condensate involving necessarily all flavours. © 1994, Società Italiana di Fisica. All rights reserved.
Ferrari, R., Montalbano, A.V. (1994). On violation of linked-cluster property in the Schwinger model. NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. A, NUCLEI, PARTICLES AND FIELDS, 107(8), 1383-1404 [10.1007/BF02775778].
On violation of linked-cluster property in the Schwinger model
MONTALBANO, ANGELA VERA
1994-01-01
Abstract
We examine the violation of linked-cluster property of the Schwinger model in the perturbative series by using partial resummation techniques. An effective chiral-invariant Lagrangian is introduced to study orders higher than the first. It is shown that the linked-cluster property is violated; thus partial resummation technique provides a route to interesting non-perturbative effects. We study also the case of QED with N fermions in 1+1 dimensions and we find that the chiral vacua are a condensate involving necessarily all flavours. © 1994, Società Italiana di Fisica. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11365/1018968