Eikonal methods in AdS/CFT: BFKL Pomeron at weak coupling

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Lorenzo Cornalba (Autor) Outra; Miguel S Costa (Autor) FCUP; Joao Penedones (Autor) FCUP

Revista

Título: Journal of High Energy Physics

Vol. 2008

Páginas: 048-048

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 78 Citações

Scopus - 77 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-003-Z0V

DOI: 10.1088/1126-6708/2008/06/048

Abstract (EN): We consider correlators of N = 4 super Yang Mills of the form A similar to <(O1O2O1O2 star)-O-star >, where the operators O-1 and O-2 are scalar primaries. In particular, we analyze this correlator in the planar limit and in a Lorentzian regime corresponding to high energy interactions in AdS. The planar amplitude is dominated by a Regge pole whose nature varies as a function of the 't Hooft coupling g(2). At large g, the pole corresponds to graviton exchange in AdS, whereas at weak g, the pole is that of the hard perturbative BFKL Pomeron. We concentrate on the weak coupling regime and analyze Pomeron exchange directly in position space. The analysis relies heavily on the conformal symmetry of the transverse space E 2 and of its holographic dual hyperbolic space H 3, describing with an unified language, both the weak and strong 't Hooft coupling regimes. In particular, the form of the impact factors is highly constrained in position space by conformal invariance. Finally, the analysis suggests a possible AdS eikonal resummation of multi-Pomeron exchanges implementing AdS unitarity, which differs from the usual 4-dimensional eikonal exponentiation. Relations to violations of 4-dimensional unitarity at high energy and to the onset of nonlinear effects and gluon saturation become immediate questions for future research.

Idioma: Inglês

Tipo (Avaliação Docente): Científica