High Precision for Hard Processes at the LHC

Session

Day 1

6 Sept 2006, 09:00

ETH Zurich

1. Road to the LHC: passing by the Tevatron

Joey Huston (Michigan)

06/09/2006, 09:00

9. Latest results from MC@NLO

Bryan Webber (Cambridge)

06/09/2006, 09:40

8. The Unitarity Bootstrap for QCD Loop Amplitudes

David Kosower (Saclay)

06/09/2006, 10:05

7. Higgs+dijets production at NLO with semi-numerical methods

Giulia Zanderighi (CERN)

06/09/2006, 11:00

13. Can we find a computationally efficient loop algorithm?

Giampiero Passarino (Torino)

06/09/2006, 11:25

Even disregarding the intrinsic necessity of some new algorithm for numerical evaluation of one-loop diagrams, and even in case it has no intrinsic necessity at all, a probable decision about its goodness is possible inductively by studying its success. Success here means fruitfulness in consequences, in particular in verifiable consequences, i.e., consequences demonstrable without the...

14. Precise predictions for the Higgs-boson decay H -> WW/ZZ -> 4 fermions

Ansgar Denner (PSI Zurich)

06/09/2006, 11:50

The decay of the Standard Model Higgs boson into four fermions via a virtual W-boson or Z-boson pair is one of the most important decay modes in the Higgs-boson search at the LHC. We present a calculation of the first order radiative corrections to these processes, including higher order improvements. The intermediate W- and Z-boson resonances are consistently described using the...

15. Numerical evaluation of one-loop amplitudes

David Soper (Oregon)

06/09/2006, 14:00

4. Automated QCD calculations at NLO

Stefan Weinzierl (Mainz)

06/09/2006, 14:25

I will discuss various technical aspects related to automated QCD calculations at NLO: - the recursive calculation of amplitudes, - the organization of the colour structures, - the automated generation of subtraction terms, - the numerical tensor reduction of loop integrals.

2. Unitarity Cuts and QCD Loop Amplitudes

Ruth Britto (Amsterdam)

06/09/2006, 14:50

3. Loop amplitudes from MHV diagrams (I)

Gabriele Travaglini (Queen Mary)

06/09/2006, 15:35

10. Exclusive Drell-Yan production at NN LO

William Kilgore (Brookhaven)

06/09/2006, 16:00

I describe a parton-level Monte Carlo calculation of Drell-Yan production at next-to-next-to-leading order. The calculation is performed with a subtraction scheme in which the subtraction term is the squared matrix element itself.

11. Status of NNLO corrections to e+e- -> 3j

Thomas Gehrmann (Uni Zurich)

06/09/2006, 16:25

5. Computing one-loop amplitudes at the integrand level

Roberto Pittau (Torino)

06/09/2006, 17:10

We show how to extract the coefficients of the 4-, 3-, 2- and 1-point one-loop scalar integrals from the full one-loop amplitude of arbitrary scattering processes. In a similar fashion, also the rational terms can be derived. Basically no information on the analytical structure of the amplitude is required, making our method appealing for an efficient numerical implementation.

12. Higgs Production via Gluon Fusion: QCD corrections to Squark Loops

Michael Spira (PSI)

06/09/2006, 17:35

The loop-induced processes gg -> h,H,A provide the dominant Higgs boson production mechanisms at the Tevatron and LHC in a large range of the minimal supersymmetric extension of the Standard Model. For squark masses below ~400 GeV squark loop contributions become important in addition to the top and bottom quark loops. The two-loop QCD corrections to the squark contributions of these...

6. QCD corrections to vector-boson fusion processes

Carlo Oleari (Bicocca, Milano)

06/09/2006, 18:00