No Massless Pions in Nambu-Jona-Lasinio Model due to Chiral Fluctuations
| dc.creator | Kleinert, H. | |
| dc.creator | Bossche, B. Van den | |
| dc.date | 1999-08-06 | |
| dc.date | 1999-10-24 | |
| dc.date.accessioned | 2026-07-25T20:41:43Z | |
| dc.description | In contrast to common belief, the chirally symmetric Nambu--Jona-Lasinio model does not contain massless pions, due to strong chiral fluctuations. Although quarks acquire spontaneously a nonzero constituent mass $M$, pions have a nonzero mass equal to the mass of $ \s $-mesons, both being of the order of $M$. This result is found in several cutoff schemes. Our derivation is nonperturbative, but involves a simple approximation (London limit) which should, however, receive only quantitative, no qualitative corrections. | |
| dc.description | Version 2 contains several improvements. Author Information under http://www.physik.fu-berlin.de/~kleinert/institution.html . Latest update of paper also at http://www.physik.fu-berlin.de/~kleinert/296 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9908284 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9908284 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/72346 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | No Massless Pions in Nambu-Jona-Lasinio Model due to Chiral Fluctuations | |
| dc.type | text |