187 research outputs found
Electroweak Radiative Corrections to W and Z Boson Production at Hadron Colliders
For the envisioned high precision measurement of the W boson mass at the
Tevatron and LHC it is crucial that the theoretical predictions for the W and Z
production processes are under control. We briefly summarize the status of the
electroweak radiative corrections to p p(pbar) -> W -> l nu and p p(pbar) ->
Z,gamma -> l+ l- (l=e,mu), and present some numerical results.Comment: 3 pages, 1 figure, talk given at the DPF2000 meeting, Columbus, OH,
August 9-12, 200
Combining NLO QCD and Electroweak Radiative Corrections to W boson Production at Hadron Colliders in the POWHEG Framework
The precision measurement of the mass of the boson is an important goal
of the Fermilab Tevatron and the CERN Large Hadron Collider (LHC). It requires
accurate theoretical calculations which incorporate both higher-order QCD and
electroweak corrections, and also provide an interface to parton-shower Monte
Carlo programs which make it possible to realistically simulate experimental
data. In this paper, we present a combination of the full
electroweak corrections of {\tt WGRAD2}, and the next-to-leading order QCD
radiative corrections to production in hadronic collisions in a
single event generator based on the {\tt POWHEG} framework, which is able to
interface with the parton-shower Monte Carlo programs {\tt Pythia} and {\tt
Herwig}. Using this new combined QCD+EW Monte Carlo program for production
we provide numerical results for total cross sections and kinematic
distributions of relevance to the mass measurement at the Tevatron and the
LHC for the processes . In
particular, we discuss the impact of EW corrections in the presence of QCD
effects when including detector resolution effects.Comment: 32 pages, 28 postscript figures, typos fixed, plot on the right-hand
side of Fig.12 replaced with results from a higher statistics run, note adde
Electroweak Radiative Corrections to Weak Boson Production at Hadron Colliders
We summarize the status of calculations of the electroweak radiative
corrections to W and Z boson production via the Drell-Yan mechanism at hadron
colliders. To fully exploit the precision physics potential of the
high-luminosity environment of the Fermilab Tevatron pbar p (Run II) and the
CERN LHC pp colliders, it is crucial that the theoretical predictions are well
under control. The envisioned precision physics program includes a precise
measurement of the W boson mass and width, and the (leptonic) weak mixing
angle, as well as probing the Standard Model (SM) of electroweak interactions
at the highest accessible center-of-mass energies. Some numerical results are
presented.Comment: Latex, 5 pages, 4 figures, talk given by UB at RADCOR2002/Loops and
Legs, Kloster Banz, Germany, Sep. 2002, to appear in the Proceeding
Electroweak Precision Physics at e+ e- Colliders with RacoonWW
We present precise predictions for the processes e+ e- -> WW -> 4f(gamma) at
LEP2 and future Linear-Collider (LC) energies obtained with the Monte Carlo
generator RacoonWW. The program RacoonWW includes the complete O(alpha)
electroweak radiative corrections to e+ e- -> WW -> 4f in the double-pole
approximation (DPA). While the virtual corrections are treated in DPA, the
calculation of the bremsstrahlung corrections is based on the full lowest-order
matrix elements to the processes e+ e- -> 4f+gamma. This asymmetric treatment
of virtual and real photons requires a careful matching of the arising infrared
and collinear singularities. We also take into account higher-order
initial-state photon radiation via the structure-function method. Here, we
briefly describe the RacoonWW approach, give numerical results for the total
W-pair production cross sections, confront them with LEP2 data, and study the
impact of the radiative corrections on angular and W-invariant-mass
distributions at LEP2 and LC energies.Comment: 12 pages, 13 postscript figures, to appear in the Proceedings of the
22nd annual MRST Conference on Theoretical High Energy Physics (MRST 2000),
Rochester, New York, May 8-9, 200
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