skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: WW Production at the LHC in NLO Simulations

Abstract

The WW production via leptonic decay is studied using next-to-leading order generators. The output from the Baur, Han and Ohnemus (BHO) NLO code is compared with MC-NLO generator.

Authors:
; ; ; ;  [1]
  1. Institute of Physics, Belgrade (Serbia and Montenegro)
Publication Date:
OSTI Identifier:
21057138
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733118; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; COMPUTERIZED SIMULATION; LEPTONIC DECAY; LEPTONS; LINEAR COLLIDERS; NONLINEAR OPTICS; PARTICLE PRODUCTION; QUANTUM CHROMODYNAMICS; W MINUS BOSONS; W PLUS BOSONS

Citation Formats

Vranjes, N., Simic, Lj., Reljic, D., Vudragovic, D., and Popovic, D. S.. WW Production at the LHC in NLO Simulations. United States: N. p., 2007. Web. doi:10.1063/1.2733118.
Vranjes, N., Simic, Lj., Reljic, D., Vudragovic, D., & Popovic, D. S.. WW Production at the LHC in NLO Simulations. United States. doi:10.1063/1.2733118.
Vranjes, N., Simic, Lj., Reljic, D., Vudragovic, D., and Popovic, D. S.. Mon . "WW Production at the LHC in NLO Simulations". United States. doi:10.1063/1.2733118.
@article{osti_21057138,
title = {WW Production at the LHC in NLO Simulations},
author = {Vranjes, N. and Simic, Lj. and Reljic, D. and Vudragovic, D. and Popovic, D. S.},
abstractNote = {The WW production via leptonic decay is studied using next-to-leading order generators. The output from the Baur, Han and Ohnemus (BHO) NLO code is compared with MC-NLO generator.},
doi = {10.1063/1.2733118},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • We compute the total cross section and the transverse momentum distribution for single charged slepton and sneutrino production at hadronic colliders including NLO supersymmetric and nonsupersymmetric QCD corrections. The supersymmetric QCD corrections can be substantial. We also resum the gluon transverse momentum distribution and compare our results with two Monte Carlo generators. We compute branching ratios of the supersymmetric decays of the slepton and determine event rates for the like-sign dimuon final state at the Tevatron and at the LHC.
  • In this talk, we present our calculations for the next-to-leading order(NLO) QCD corrections to the cross sections (CS) of the associate production processes pp->gq->q-tilde{sub i}chi-tilde{sub j}{sup +}-+X with q = (u,d) in the constrained minimal supersymmetric standard model in the CERN LHC experiments. The NLO QCD corrections can in general provide a 30-40% enhancement to the corresponding cross sections, and significantly reduce the dependence of the total cross section on the renormalization and factorization scales.
  • The single and double diffractive cross sections for heavy quarks production are evaluated at NLO accuracy for hadronic and heavy ion collisions at the LHC. Diffractive charm and bottom production is the main subject of this work, providing predictions for CaCa, PbPb and pPb collisions. The hard diffraction formalism is considered using the Ingelman-Schlein model where a recent parametrization for the Pomeron structure function (DPDF) is applied. Absorptive corrections are taken into account as well. The diffractive ratios are estimated and theoretical uncertainties are discussed. Comparison with competing production channels is also presented.
  • We obtain predictions accurate at the next-to-leading order in QCD for the production of a generic spin-two particle in the most relevant channels at the LHC: production in association with coloured particles (inclusive, one jet, two jets andmore » $$t\bar t$$), with vector bosons ($$Z,W^\pm,\gamma$$) and with the Higgs boson. Here, we present total and differential cross sections as well as branching ratios as a function of the mass and the collision energy also considering the case of non-universal couplings to standard model particles. We find that the next-to-leading order corrections give rise to sizeable $K$ factors for many channels, in some cases exposing the unitarity-violating behaviour of non-universal couplings scenarios, and in general greatly reduce the theoretical uncertainties. Our predictions are publicly available in the MadGraph5_aMC@NLO framework and can, therefore, be directly used in experimental simulations of spin-two particle production for arbitrary values of the mass and couplings.« less
  • In this paper, we study the impact of anomalous gauge boson and fermion couplings on the production of W +W - pairs at the LHC. Helicity amplitudes are presented separately to demonstrate the sources of new physics contributions and the impact of QCD and electroweak corrections. The QCD corrections have important effects on the fits to anomalous couplings, in particular when one W boson is longitudinally polarized and the other is transversely polarized. In effective field theory language, we demonstrate that the dimension-6 approximation to constraining new physics effects in W +W - pair production fails at p T ~more » 500 - 1000 GeV.« less
    Cited by 2