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Possible astrophysical probes of quantum gravity

(2002)
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The QCD/SM Working Group: Summary Report

ArXiv hep-ph/0204316 (2002)

Authors:

S Alekhin, C Balazs, R Ball, T Binoth, E Boos, M Botje, M Cacciari, S Catani, V Del Duca, M Dobbs, SD Ellis, R Field, D de Florian, S Forte, E Gardi, T Gehrmann, A Gehrmann-De Ridder, W Giele, EWN Glover, M Grazzini, J-Ph Guillet, G Heinrich, J Huston, I Hinchliffe, V Ilyin, J Kanzaki, K Kato, B Kersevan, N Kidonakis, A Kulesza, Y Kurihara, E Laenen, K Lassila-Perini, L Lonnblad, L Magnea, M Mangano, K Mazumudar, S Moch, S Mrenna, P Nadolsky, P Nason, F Olness, F Paige, E Pilon, I Puljak, J Pumplin, E Richter-Was, G Salam, R Scalise, M Seymour, T Sjostrand, G Sterman, M Tonnesmann, E Tournefier, W Vogelsang, A Vogt, R Vogt, B Webber, C-P Yuan, D Zeppenfeld

Abstract:

This Report documents the results obtained by the Working Group on Quantum ChromoDynamics and the Standard Model for the Workshop ``Physics at TeV Colliders'', Les Houches, France, 21 May - 1 June 2001. The account of uncertainties in Parton Distribution Functions is reviewed. Progresses in the description of multiparton final states at Next-to-Leading Order and the extension of calculations for precision QCD observables beyond this order are summarized. Various issues concerning the relevance of resummation for observables at TeV colliders is examined. Improvements to algorithms of jet reconstruction are discussed and predictions for diphoton and photon pi-zero production at the LHC are made for kinematic variables of interest regarding searches for a Higgs boson decaying into two photons. Finally, several improvements implemented in Monte-Carlo event generators are documented.
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Expanding running coupling effects in the hard Pomeron

(2002)

Authors:

M Ciafaloni, D Colferai, GP Salam, AM Stasto
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Tunneling transition to the Pomeron regime

(2002)

Authors:

M Ciafaloni, D Colferai, GP Salam, A Stasto
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On the graviton self energy in AdS4

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 532:1-2 (2002) 48-54

Authors:

M Porrati, A Starinets

Abstract:

We consider Einstein gravity coupled to a CFT made of a single free conformal scalar in AdS4. This simple case is rich enough to explain an unexpected gravitational Higgs phenomenon that has no flat-space counterpart, yet simple enough that many calculations can be carried on exactly. Specifically, in this Letter we compute the graviton self energy due to matter, and we exhibit its spectral representation. This enables us to find the spin-2 bound-state content of the system. © 2002 Elsevier Science B.V. All rights reserved.
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