On the treatment of threshold effects in SUSY spectrum computations

Abstract

We take a critical view of the treatment of threshold effects in SUSY spectrum computations from high-scale input. We discuss the two principal methods of (a) renormalization at a common SUSY scale versus (b) integrating out sparticles at their own mass scales. We point out problems in the implementations in public spectrum codes, together with suggestions for improvements. In concrete examples, we compare results of Isajet7.72 and Spheno2.2.3, and present the improvements done in Isajet7.73. We also comment on theoretical uncertainties. Last but not least, we outline how a consistent multiscale approach may be achieved.

arXiv comment15 pages, 1 figure

References in corpus (28)

• SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
• Precision Corrections in the Minimal Supersymmetric Standard Model
• SuSpect: a Fortran Code for the Supersymmetric and Higgs Particle Spectrum in the MSSM
• SOFTSUSY: a program for calculating supersymmetric spectra
• Effective lagrangian for the tbH^+ interaction in the MSSM and charged Higgs phenomenology
• Decoupling Relations to O(alpha_s^3) and their Connection to Low-Energy Theorems
• Physics Interplay of the LHC and the ILC
• The Renormalization-Group Improved Higgs Sector of the Minimal Supersymmetric Model
• ISAJET 7.37: A Monte Carlo Event Generator for $pp$, $\bar{p}p$, and $e^{+}{e}^{-}$ Interactions
• Precise determination of the neutral Higgs boson masses in the MSSM
• On the O(alpha_t^2) two-loop corrections to the neutral Higgs boson masses in the MSSM
• On the neutral Higgs boson masses in the MSSM for arbitrary stop mixing
• On the two-loop sbottom corrections to the neutral Higgs boson masses in the MSSM
• Resummed Effective Lagrangian for Higgs-Mediated FCNC Interactions in the CP-Violating MSSM
• Renormalization Group Study of the Standard Model and its Extensions: II. the Minimal Supersymmetric Standard Model
• Improved SUSY QCD corrections to Higgs boson decays into quarks and squarks
• Two-loop corrections to Radiative Electroweak Symmetry Breaking in the MSSM
• The Reconstruction of Supersymmetric Theories at High Energy Scales
• Theoretical uncertainties in sparticle mass predictions from computational tools
• Comparison of SUSY spectrum calculations and impact on the relic density constraints from WMAP
• Requirements on collider data to match the precision of WMAP on supersymmetric dark matter
• Reconstructing Supersymmetric Theories at High Energy Scales
• Analysis of the chargino and neutralino mass parameters at one-loop level
• Radiative Electroweak symmetry breaking in the MSSM and Low Energy Thresholds
• Reconstructing Supersymmetric Theories by Coherent LHC / LC Analyses
• Effective operators in Supersymmetry
• SUSY Parameter Analysis at TeV and Planck Scales
• Uncertainties in Relic Density Calculations in mSUGRA

Cited by in corpus (57)

• Updated Values of Running Quark and Lepton Masses
• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Implications of a 125 GeV Higgs scalar for LHC SUSY and neutralino dark matter searches
• Radiative natural supersymmetry: Reconciling electroweak fine-tuning and the Higgs boson mass
• SUSY models under siege: LHC constraints and electroweak fine-tuning
• How conventional measures overestimate electroweak fine-tuning in supersymmetric theory
• Dark matter allowed scenarios for Yukawa-unified SO(10) SUSY GUTs
• Post-LHC7 fine-tuning in the mSUGRA/CMSSM model with a 125 GeV Higgs boson
• Mixed axion/neutralino cold dark matter in supersymmetric models
• The Supersymmetric Parameter Space in Light of B-physics Observables and Electroweak Precision Data
• Direct and indirect detection of higgsino-like WIMPs: concluding the story of electroweak naturalness
• Upper bounds on sparticle masses from naturalness or how to disprove weak scale supersymmetry
• The Landscape of Sparticle Mass Hierarchies and Their Signature Space at the LHC
• Supersymmetry discovery potential of the LHC at $\sqrt{s}=$10 and 14 TeV without and with missing $E_T$
• Coupled Boltzmann calculation of mixed axion/neutralino cold dark matter production in the early universe
• Precision gluino mass at the LHC in SUSY models with decoupled scalars
• Cosmological consequences of Yukawa-unified SUSY with mixed axion/axino cold and warm dark matter
• Sparticles at the LHC
• Light Higgses at the Tevatron and at the LHC and Observable Dark Matter in SUGRA and D Branes
• Radiatively-driven natural supersymmetry at the LHC
• Target dark matter detection rates in models with a well-tempered neutralino
• Capability of LHC to discover supersymmetry with \sqrt{s}=7 TeV and 1 fb^{-1}
• Collider and Dark Matter Phenomenology of Models with Mirage Unification
• Collider signals and neutralino dark matter detection in relic-density-consistent models without universality
• Phenomenological Indications of the Scale of Supersymmetry
• SO(10) SUSY GUTs, the gravitino problem, non-thermal leptogenesis and axino dark matter
• Dark Radiation Constraints on Mixed Axion/Neutralino Dark Matter
• Testing Yukawa-unified SUSY during year 1 of LHC: the role of multiple b-jets, dileptons and missing E_T
• A heavier gluino from t-b-tau Yukawa-unified SUSY
• Sparticle mass spectra from SU(5) SUSY GUT models with $b-\tau$ Yukawa coupling unification
• Low Intermediate Scales for Leptogenesis in Supersymmetric SO(10) Grand Unified Theories
• Prospects for Yukawa Unified SO(10) SUSY GUTs at the CERN LHC
• Scalar-Top Masses from SUSY Loops with 125 GeV mh and precise Mw, mt
• Mixed Higgsino Dark Matter from a Reduced SU(3) Gaugino Mass: Consequences for Dark Matter and Collider Searches
• Collider and Dark Matter Searches in Models with Mixed Modulus-Anomaly Mediated SUSY Breaking
• Neutrino sector impacts SUSY dark matter
• Implications of Compressed Supersymmetry for Collider and Dark Matter Searches
• Running of ${\alpha }_s$ and $m_b$ in the MSSM
• Collider, direct and indirect detection of supersymmetric dark matter
• Mixed Higgsino Dark Matter from a Large SU(2) Gaugino Mass
• Implications of a high mass light MSSM Higgs scalar for SUSY searches at the LHC
• Running mass of the b-quark in QCD and SUSY QCD
• Early SUSY discovery at LHC via sparticle cascade decays to same-sign and multimuon states
• Electroweak versus high scale finetuning in the 19-parameter SUGRA model
• Threshold and Flavour Effects in the Renormalization Group Equations of the MSSM I: Dimensionless Couplings
• Implications of naturalness for the heavy Higgs bosons of supersymmetry
• SUSY dark matter and lepton flavor violation
• CMSSM with Yukawa Quasi-Unification Revisited
• Yukawa-unified natural supersymmetry
• On the two-loop decoupling corrections to tau-lepton and b-quark running masses in the MSSM
• LHC discovery potential for supersymmetry with \sqrt{s}=7 TeV and 5-30 fb^{-1}
• Beyond the Higgs boson at the Tevatron: detecting gluinos from Yukawa-unified SUSY
• Chances for SUSY-GUT in the LHC Epoch
• SUSY interpretation of the Egret GeV anomaly, Xenon-10 dark matter search limits and the LHC
• Exploring neutralino dark matter resonance annihilation via bA,bH -> b mu^+ mu^- at the LHC
• Determining the squark mass at the LHC
• Rare Higgs Decay into a Photon and a Z Boson in Radiatively-Driven Natural Supersymmetry