67762731
The next-to-leading order vertex for a forward jet plus a rapidity gap at high energies
We present the results for the calculation of the forward jet vertex associated to a rapidity gap (coupling of a hard pomeron to the jet) in the Balitsky-Fadin-Kuraev-Lipatov (BFKL) formalism at next-to-leading order (NLO). We handle the real emission contributions making use of the high energy eective action proposed by Lipatov, valid for multi-Regge and quasimulti-Regge kinematics. This result is important since it allows, together with the NLO non-forward gluon Green function, to perform NLO studies of jet production in diractive events (Mueller-Tang dijets, as a well-known example).
118954518
High-Energy Dijets in N=4 SYM
Ratios of azimuthal angle correlations for Mueller-Navelet jets are compared in QCD and N = 4 SYM. Such observables are well suited to study the effects of Moebius invariance in the Regge limit. The role of the renormalization prescription and the size of conformal contributions is addressed, showing that the BLM procedure best reproduces the N = 4 SYM results.
6795051
A note on the string spectrum at the Hagedorn temperature
We discuss semi-classical string configurations at finite temperature. We find that those soliton solution in the background describing type IIA strings disappear or become divergent when we approach the Hagedorn temperature in the strong coupling regime. These findings together with a semi-classical analysis for the Hawking radiation let us to think that Hawking radiation is mainly driven by the existence of highly excited states. As by side, we check that beside the thermodynamical instability the system is dynamical unstable before reaching the Hagedorn temperature.
118301514
The Gluon-Induced Mueller-Tang Jet Impact Factor at Next-to-Leading Order
M. Hentschinski,1 J. D. Madrigal Mart́ınez,2 B. Murdaca3 & A. Sabio Vera4,5 Department of Physics, Brookhaven National Laboratory, Upton, NY 11973, USA. Institut de Physique Théorique, CEA Saclay, F-91191 Gif-sur-Yvette, France. Istituto Nazionale di Fisica Nucleare, Grupo Collegiato di Cosenza, I-87036 Arcavacata di Rende, Cosenza, Italy. Instituto de F́ısica Teórica UAM/CSIC, Nicolás Cabrera 15 & Facultad de Ciencias, Universidad Autónoma de Madrid, C.U. Cantoblanco, E-28049 Madrid, Spain. CERN, Geneva, Switzerland.
67810160
Recent results within Lipatov’s high energy effective action
We review Lipatov’s high energy effective action and show that it is a useful computational tool to calculate QCD scattering amplitudes in the high energy limit. We explain in some detail our recent work where a novel regularization and subtraction procedure has been proposed that allows to extend the use of this effective action beyond tree level. As explicit results we discuss the derivation of forward jet vertices, for jet events with and without rapidity gaps.
119101186
Particle Production with Rapidity Correlations in Proton-Nucleus Collisions
We illustrate how a generalization of the JIMWLK formalism which treats independently the direct and complex conjugate amplitudes can be used to describe semi-inclusive multiparticle production with rapidity correlations in pA collisions. The evolution equations that are obtained with this formalism are susceptible of numerical implementation as a Langevin process.
197479182
Remarks on the representation theory of the Moyal plane
The authors would like to thank the referee for constructive suggestions. J. M. Isidro thanks Max-Planck-Institut fur Gravitationsphysik (Albert-Einstein-Institut) Golm, Germany, for hospitality. This paper has been supported by Universidad Politecnica de Valencia under Grant PAID-06-09, and by Generalitat Valenciana Spain.