Axion-photon coupling from non-anomalous PQ symmetry with charged light fermions acts as bandpass filter, making lab constraints dominant for most axion masses.
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Automatized One-Loop Calculations in 4 and D dimensions
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abstract
Two program packages are presented for evaluating one-loop amplitudes. They can work either in dimensional regularization or in constrained differential renormalization. The latter method is found at the one-loop level to be equivalent to regularization by dimensional reduction.
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One-loop Feynman-diagram corrections in the scale-invariant THDM shift BSM Higgs masses by O(10%) and induce non-negligible neutral-scalar mixing, contrary to earlier effective-potential calculations.
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Higher-order electromagnetic and hadronic contributions to dark photon bremsstrahlung have limited impact on signal and background predictions for LDMX and LOHENGRIN except for requiring an HCAL extension in LOHENGRIN to veto diffractive backgrounds.
MATCHA is a new software package for automated LO matching of arbitrary UV models to HEFT, capturing O(1) non-decoupling effects via FeynRules inputs.
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Computes one-loop mixing of bosonic and two-fermion interactions into two-fermion operators in dim-8 SMEFT, leaving only four-fermion to two-fermion mixing to finish the renormalization program.
CPT-odd Lorentz-violating scalar QCD is multiplicatively renormalizable at one loop, with all divergences absorbed into existing counterterms and explicit beta functions obtained.
SubTropica is a software package that automates symbolic integration of linearly-reducible Euler integrals via tropical subtraction, supported by HyperIntica and an AI-driven Feynman integral database.
The POWHEG BOX provides a general computer code framework for implementing NLO calculations in shower Monte Carlo programs according to the POWHEG method.
Real scalar singlet extension of SM permits strong first-order EWPT for singlet masses up to ~1 TeV; HL-LHC tests large fraction of space while FCC offers discovery reach.
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The paper presents first numerical one-loop hadronic W decay widths for an on-shell scheme with δV=0, where off-diagonal mass counterterms replace mixing-angle counterterms.
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Pion-induced QED radiative corrections in inverse beta decay are small, at or below nucleon form factor uncertainties, enabling sub-permille theoretical precision for charged-current neutrino-nucleon scattering above 10 MeV.
Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with data at 3 sigma.
A participant's review of how factorization, infrared safety, resummation, computer algebra, and spinor methods turned perturbative QCD into a quantitative tool during 1976–2000.
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citing papers explorer
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A Bandpass Axion Or: How I Learned To Stop Worrying About Stars And Love The Lab
Axion-photon coupling from non-anomalous PQ symmetry with charged light fermions acts as bandpass filter, making lab constraints dominant for most axion masses.
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Revisiting the Higgs-mass calculation in the scale-invariant THDM
One-loop Feynman-diagram corrections in the scale-invariant THDM shift BSM Higgs masses by O(10%) and induce non-negligible neutral-scalar mixing, contrary to earlier effective-potential calculations.
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The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
MadGraph5_aMC@NLO automates tree-level, NLO, shower-matched, and merged cross-section computations for collider processes in a unified flexible framework.
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Theory Calculations for LDMX and LOHENGRIN beyond Coherent Bethe-Heitler Scattering
Higher-order electromagnetic and hadronic contributions to dark photon bremsstrahlung have limited impact on signal and background predictions for LDMX and LOHENGRIN except for requiring an HCAL extension in LOHENGRIN to veto diffractive backgrounds.
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MATCHA: A Mathematica package for matching UV models onto HEFT
MATCHA is a new software package for automated LO matching of arbitrary UV models to HEFT, capturing O(1) non-decoupling effects via FeynRules inputs.
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$\bar{B}_{s,d}^{0} \to J/\psi \mu^{+}\mu^{-}$ Decays in QCD Factorization
Computes branching ratios of order 10^{-10} for Bs and 10^{-11} for Bd decays after NLO vertex corrections in QCD factorization, plus dimuon distributions and J/psi polarization.
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Renormalization of the SMEFT to Dimension Eight: Fermionic Interactions II
Computes one-loop mixing of bosonic and two-fermion interactions into two-fermion operators in dim-8 SMEFT, leaving only four-fermion to two-fermion mixing to finish the renormalization program.
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Perturbative Analysis of CPT-Odd Lorentz-Violating Scalar QCD
CPT-odd Lorentz-violating scalar QCD is multiplicatively renormalizable at one loop, with all divergences absorbed into existing counterterms and explicit beta functions obtained.
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SubTropica
SubTropica is a software package that automates symbolic integration of linearly-reducible Euler integrals via tropical subtraction, supported by HyperIntica and an AI-driven Feynman integral database.
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A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
The POWHEG BOX provides a general computer code framework for implementing NLO calculations in shower Monte Carlo programs according to the POWHEG method.
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Constraining the real scalar singlet extension of the SM
Real scalar singlet extension of SM permits strong first-order EWPT for singlet masses up to ~1 TeV; HL-LHC tests large fraction of space while FCC offers discovery reach.
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Sensitivity to top-quark couplings in diboson production at lepton colliders
NLO EW corrections to WW production from SMEFT top operators yield competitive sensitivity at LEP3 and FCC-ee relative to ZH production and existing LEP/LHC bounds.
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Renormalization of mixing angles and computation of the hadronic $W$ decay widths
The paper presents first numerical one-loop hadronic W decay widths for an on-shell scheme with δV=0, where off-diagonal mass counterterms replace mixing-angle counterterms.
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Underground Production of Electromagnetic Dark States by MeV-scale Electron Beams and Detection with CCDs
Proposes underground MeV-scale electron-beam production of millicharged or dipole fermions followed by CCD detection to access unconstrained parameter space.
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The $Z_3$ soft breaking in the I(2+1)HDM and its cosmological probes
Soft Z3 breaking in the I(2+1)HDM makes the lightest Z3-charged neutral scalar a dark matter candidate while allowing a long-lived opposite-CP state to contribute to relic density or yield missing-energy plus multi-lepton/jet signatures with displaced vertices at the ILC.
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QED radiative corrections in inverse beta decay from virtual pions
Pion-induced QED radiative corrections in inverse beta decay are small, at or below nucleon form factor uncertainties, enabling sub-permille theoretical precision for charged-current neutrino-nucleon scattering above 10 MeV.
-
Global analysis of a minimally extended scotogenic model
Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with data at 3 sigma.
-
Perturbative QCD as a quantitative tool in the years 1976-2000
A participant's review of how factorization, infrared safety, resummation, computer algebra, and spinor methods turned perturbative QCD into a quantitative tool during 1976–2000.
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The Monte Carlo Ecosystem in High-Energy Physics: A Primer
A primer by six leading developers maps the full Monte Carlo chain (matrix elements, parton showers, hadronisation, detector simulation, tuning, analysis) and the computing and reproducibility issues that come with it.