End-point resummation in squark decays

Abstract

We study soft and collinear gluon emission in squark decays to quark--neutralino pair, at next-to-next-to-leading logarithmic (NNLL) accuracy in the end-point region, using Soft Collinear Effective Theory (SCET), and at next-to-leading (NLO) fixed order in the rest of the phase space. As a phenomenological case study we discuss the impact of radiative corrections on the simultaneous measurements of squark and neutralino masses at a linear $e^{+}{e}^{-}$ collider based on $\sqrt{s}=3$ TeV Compact Linear Collider (CLIC). Since the majority of mass measurement techniques are based on edges in kinematic distributions, and these change appreciably when there is additional QCD radiation in the final state, the knowledge of higher-order QCD effects is required for precise mass determinations.

arXiv comment31 pages and 7 figures

References in corpus (53)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• Particle Dark Matter: Evidence, Candidates and Constraints
• FastJet user manual
• Supersymmetric Dark Matter
• MadGraph 5 : Going Beyond
• A Supersymmetry Primer
• An effective field theory for collinear and soft gluons: heavy to light decays
• Soft-Collinear Factorization in Effective Field Theory
• The Three-Loop Splitting Functions in QCD: The Non-Singlet Case
• Summing Sudakov logarithms in B -> X_s + gamma in effective field theory
• Factorization and Momentum-Space Resummation in Deep-Inelastic Scattering
• Factorization and Shape-Function Effects in Inclusive B-Meson Decays
• Threshold Resummation in Momentum Space from Effective Field Theory
• A comprehensive approach to new physics simulations
• Gluino Stransverse Mass
• Measuring superparticle masses at hadron collider using the transverse mass kink
• Using Subsystem MT2 for Complete Mass Determinations in Decay Chains with Missing Energy at Hadron Colliders
• On measuring the masses of pair-produced semi-invisibly decaying particles at hadron colliders
• Higgs Physics at the CLIC Electron-Positron Linear Collider
• Renormalization-Group Improved Calculation of the B->Xs+gamma Branching Ratio
• Shape function effects in B -> X_s gamma and B -> X_u l nu decays
• Dark Matter Particle Spectroscopy at the LHC: Generalizing MT2 to Asymmetric Event Topologies
• Comparing and Counting Logs in Direct and Effective Methods of Resummation
• Accurate Mass Determinations in Decay Chains with Missing Energy
• A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
• A New SUSY mass reconstruction method at the CERN LHC
• A superspace module for the FeynRules package
• M_T2-assisted on-shell reconstruction of missing momenta and its application to spin measurement at the LHC
• Guide to transverse projections and mass-constraining variables
• Superpartner mass measurements with 1D decomposed MT2
• Physics at the CLIC Multi-TeV Linear Collider
• Soft Wilson lines in soft-collinear effective theory
• Diphoton decays of stoponium at the Large Hadron Collider
• Production and Decay of Scalar Stoponium Bound States
• Advanced Predictions for Moments of the B->X_s+gamma Photon Spectrum
• Squark Mass Determination at the Next Generation of Linear $e^{+}{e}^{-}$ Colliders
• A hybrid method for determining particle masses at the Large Hadron Collider with fully identified cascade decays
• NLO corrections to squark-squark production and decay at the LHC
• CLIC e+e- Linear Collider Studies
• Physics performances for Scalar Electron, Scalar Muon and Scalar Neutrino searches at 3 TeV and 1.4 TeV at CLIC
• Production of Stoponium at the LHC
• Resolving Combinatorial Ambiguities in Dilepton $t\bar{t}$ Event Topologies with Constrained $M_2$ Variables
• On cascade decays of squarks at the LHC in NLO QCD
• Testing Invisible Momentum Ansatze in Missing Energy Events at the LHC
• Squark Cascade Decays to Charginos/Neutralinos: Gluon Radiation
• NNLL soft and Coulomb resummation for squark and gluino production at the LHC
• The impact of beamstrahlung on precision measurements at CLIC
• Spectral Decomposition of Missing Transverse Energy at Hadron Colliders
• Light-flavor squark reconstruction at CLIC
• Radiative distortion of kinematic edges in cascade decays