RT Journal Article
T1 Chiral Lagrangians and the QCD string
A1 Alfaro, J.
A1 Dobado González, Antonio
A1 Espriu, Domènec
AB We propose a method to derive the low-energy effective action of QCD assuming that the long-distance properties of strong interactions can be described by a string theory. We bypass the usual problems related to the existence of the tachyon and absence of the adequate Adler zero by using a sigma model approach where excitations above the correct (chirally non-invariant) QCD vacuum are included. Two-dimensional conformal invariance then implies the vanishing of the O(p(4)) effective lagrangian coefficients. We interpret this result and discuss ways to go beyond this limit.
PB Elsevier Science BV
SN 0370-2693
YR 1999
FD 1999-08-12
LK https://hdl.handle.net/20.500.14352/58724
UL https://hdl.handle.net/20.500.14352/58724
LA eng
NO [1] For a review of string theory see: M.B. Green, J.H.  Schwarz, E. Witten, Superstring Theory, Vols. 1, 2, Cambridge Univ. Press, 1987.[2] G.’t Hooft, Nucl. Phys. B72 (1974) 461; E. Witten, Nucl. Phys. B160 (1979) 57.[3] K.G. Wilson, Phys. Rev. D10 (1974) 2445.[4] See for instance: P. Frampton, Dual Resonance Models, Benjamin, 1974.[5] M. Lüscher, K. Symanzik, P. Weisz, Nucl. Phys. B173 _1980. 365; M. Lúscher, Nucl. Phys. B180 (1981) 317;  O. Alvarez, Phys. Rev. D24 (1981) 440.[6] See for instance: QCD and Collider Physics, R.K. Ellis, W.J. Stirling, B.R. Webber, Cambridge Univ. Press, Cambridge 1996.[7] J. Maldacena, Adv. Theor. Math. Phys. 2 (1998) 231.[8] Y. Nambu, in Symmetries and Quark Models, R. Chand, ed., Gordon and Breach, 1970; H.B. Nielsen, unpublished (1970); L. Susskind, Nuovo Cim. 69A (1970) 457. [9] P. Ramond, Phys. Rev. D3 (1971) 2415; A. Neveu, J. Schwarz, Nucl. Phys. B31 (1971) 86.[10] A.M. Polyakov, Nucl. Phys. B268 (1986) 406; H. Kleinert, Phys. Lett 174B (1986) 335; H. Kleinert, Phys. Rev. Lett. 58 (1987) 1915.[11] A. Polyakov, hep-thr9809057.[12] G. Veneziano, Nuovo Cim. 57A (1968) 190.[13] J. Paton, H.M. Chan, Nucl. Phys. B10 (1969)  516.[14] F. Gliozzi, J. Scherk, D. Olive, Phys. Lett. 65B (1976) 282; Nucl. Phys. B122 (1977) 253. See also J. Scherk, Rev. Mod. Phys. 47 (1975) 123.[15] C. Lovelace, Phys. Lett. 28B _1968. 265; J. Shapiro, Phys. Rev. 179 (1969) 1345.[16] M. Polyakov, V. Vereshagin, Phys. Rev. D54 (1996) 1112.[17] T. Curtright, G. Gandour, C. Zachos, Phys. Rev. Lett. 57 (1986) 799; Phys. Rev. D34 (1986) 3811.[18] E. Cremmer, J. Scherk, Nucl. Phys. B72 (1974) 117. See also A. Neveu, Dual Resonance Models and Strings in QCD, Les Houches Summer School 1982, 757.[19] C.G. Callan, E.J. Martinec, M.J. Perry, D. Friedan, Nucl. Phys. B262 (1985) 593.[20] See for instance: A. Dobado et al., in Effective Lagrangians for the Standard Model, Springer-Verlag, Berlin 1997.[21] J.M.F. Labastida, M.A. Vozmediano, Nucl. Phys. B312 (1989) 308
NO © 1999 Published by Elsevier Science B.V. All rights reserved.  We thank A. Andrianov for multiple discussions.This work was initiated during the visit of one of theauthors to the Departamento de Física of the Universidad Católica de Chile, whose hospitality is gratefully acknowledged. We acknowledge the financial support from grants CICYT AEN98-0431 and AEN96-1634, CIRIT 1996SGR00066, and, specially, from the ‘Programa de Cooperación conIberoamérica’. J.A. is partially supported by the project Fondecyt 1980816.
NO CICYT
NO Programa de Cooperación con Iberoamérica
NO CIRIT
DS Docta Complutense
RD 30 abr 2024