Critical Couplings in the Nambu--Jona-Lasinio Model with the Constant Electromagnetic Fields
Year: 1997
Type: preprint
Abstract: A detailed analysis is performed for the Nambu--Jona-Lasinio model coupled with constant (external) magnetic and/or electric fields in two, three, and four dimensions. The infrared cut-off is essential for a well-defined functional determinant by means of the proper time method. Contrary to the previous observation, the critical coupling remains nonzero even in three dimensions. It is also found that the asymptotic expansion has an excellent matching with the exact value.
Source: arXiv (Cornell University)
Authors: Ishi-i, M., Kashiwa, T., Tanimura, N.
Institution: Kyushu University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1604525943