Associated $Z^0{H}^0$ production with leptonic decays at LHC in next-to-leading order QCD

Abstract

In this work we investigate the effects of the littlest Higgs model (LHM) up to the QCD next-to-leading order (NLO) on the $Z^0{H}^0$ associated production at the CERN Large Hadron Collider (LHC). We study the dependences of the leading order and NLO QCD corrected integrated cross sections for this process on the factorization/renormalization scale and the LHM parameters. We also provide the distributions of the transverse momenta of final decay products ${\mu }^{-}$ and ${\tau }^{-}$. Our results show that the heavy neutral gauge bosons $Z_H$ and $A_H$ could induce significant discrepancies from the standard model predictions. It is found that when the LHM parameters are taken as $c=0.5$, $c^{\prime }=0.22$, $f=4TeV$ and $\mu =(M_H+M_Z)/2$, the effects at the $\sqrt{s}=14TeV$ LHC from the heavy neutral gauge boson are about 12.83% and 10.37% to the leading order and NLO QCD corrected integrated cross sections, respectively. We also conclude that the NLO QCD corrections at the $\sqrt{s}=14TeV$ LHC can obviously reduce the scale uncertainty of the integrated cross section, and significantly enhance the differential cross sections of $p_T^{{\mu }^{-}}$ and $p_T^{{\tau }^{-}}$. It demonstrates that the precision measurement of the $Z^0{H}^0$ associated production process at the LHC could provide the clue of the LHM physics.

arXiv comment26 pages, 11 figures

References in corpus (39)

• A Large Mass Hierarchy from a Small Extra Dimension
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Phenomenology, Astrophysics and Cosmology of Theories with Sub-Millimeter Dimensions and TeV Scale Quantum Gravity
• Automatized One-Loop Calculations in 4 and D dimensions
• A Supersymmetry Primer
• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• Electroweak symmetry breaking from dimensional deconstruction
• The Littlest Higgs
• The Minimal Moose for a Little Higgs
• Inclusive Jet Production, Parton Distributions, and the Search for New Physics
• Phenomenology of the Little Higgs Model
• Scalar one-loop integrals for QCD
• Little Higgs Models and Their Phenomenology
• Electroweak Radiative Corrections to Associated WH and ZH Production at Hadron Colliders
• Reduction of one-loop tensor 5-point integrals
• The two cutoff phase space slicing method
• Little Higgses from an Antisymmetric Condensate
• Dynamical supersymmetry breaking with a large internal dimension
• Variations of Little Higgs Models and their Electroweak Constraints
• The Little Higgs from a Simple Group
• Constraining the Littlest Higgs
• One-loop Radiative Corrections to the rho Parameter in the Littlest Higgs Model
• Phenomenology of Electroweak Symmetry Breaking from Theory Space
• A "Littlest Higgs" Model with Custodial SU(2) Symmetry
• The Low-Energy Structure of Little Higgs Models
• Little Higgs and Custodial SU(2)
• Introducing the Little Higgs
• Particle Physics Probes Of Extra Spacetime Dimensions
• A Simple Model of two Little Higgses
• Loop induced decays of the Little Higgs: H --> gg, gamma gamma
• Collider Tests of the Little Higgs Model
• Search for narrow resonances in dilepton mass spectra in pp collisions at sqrt(s) = 7 TeV
• Search for a heavy gauge boson decaying to a charged lepton and a neutrino in 1 fb-1 of pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
• Models of Little Higgs and Electroweak Precision Tests
• Muon anomalous magnetic moment and the heavy photon in a little Higgs model
• Little Higgs Models: New Approaches to the Hierarchy Problem
• Associated production of Z and neutral Higgs bosons at the CERN Large Hadron Collider
• About the origins of the Supersymmetric Standard Model
• Higgs production and decay in the little Higgs model

Cited by in corpus (1)

• $HZ$ associated production at the LHC within the littlest Higgs model at NLO+NLL accuracy