TY - JOUR

T1 - Effective lagrangians for four-dimensional superstrings

AU - Ferrara, Sergio

AU - Girardello, Luciano

AU - Kounnas, Costas

AU - Porrati, Massimo

N1 - Funding Information:
This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the US Department of Energy under Contract DE-AC03-76SF00098 and in part by DOE under grant number DE-AA03-76 SF-00034, NSF, under grant number PHY 8118547, and Ministero della Pubblica Istruzione, Italy. On leave of absence from LPT, Ecole Normale Sup6rieure, 24 Rue Lhomond, F-75231 Paris, France On leave of absence from Scuola Normale Superiore, Piazza dei Cavalieri 7, 1-56100 Pisa, Italy.

PY - 1987/7/2

Y1 - 1987/7/2

N2 - We derive effective supergravity lagrangians for the massless sector of new four-dimensional superstrings. The untwisted sector is obtained by suitable Z2 or Z2 ⊗ Z2′ truncations of N = 4, D = 4 lagrangians. For the N = 1 "minimal" models, related to the N = 4, SO(44) superstrings, we derive the Kähler potential, the superpotential and the f{hook} gauge kinetic function. The underlying nonlinear sigma model is based on the Kähler manifold [SU(1,1)/U(1)] ⊗ Πi = 13 {SO(2, ni)/[SO(2) ⊗ SO(ni)]}. For models without massless twisted sector, this result provides the full superstring low-energy effective action. For models with massless twisted sector, the N = 1 theory may be obtained once the quaternionic manifold of the corresponding N = 2 hypermultiplets is specified.

AB - We derive effective supergravity lagrangians for the massless sector of new four-dimensional superstrings. The untwisted sector is obtained by suitable Z2 or Z2 ⊗ Z2′ truncations of N = 4, D = 4 lagrangians. For the N = 1 "minimal" models, related to the N = 4, SO(44) superstrings, we derive the Kähler potential, the superpotential and the f{hook} gauge kinetic function. The underlying nonlinear sigma model is based on the Kähler manifold [SU(1,1)/U(1)] ⊗ Πi = 13 {SO(2, ni)/[SO(2) ⊗ SO(ni)]}. For models without massless twisted sector, this result provides the full superstring low-energy effective action. For models with massless twisted sector, the N = 1 theory may be obtained once the quaternionic manifold of the corresponding N = 2 hypermultiplets is specified.

UR - http://www.scopus.com/inward/record.url?scp=0001560976&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001560976&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(87)90122-5

DO - 10.1016/0370-2693(87)90122-5

M3 - Article

AN - SCOPUS:0001560976

SN - 0370-2693

VL - 192

SP - 368

EP - 376

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -