High Energy Physics - Phenomenology · arXiv:1307.7924 v2 · submitted 30 Jul 2013
Ensemble fermions for electroweak dynamics and the fermion preheating temperature
The paper says
“We find that this temperature is never below 20 GeV, and this in combination with the early results convincingly rules out Standard Model CP-violation as the origin of the baryon asymmetry of the Universe.”
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The paper
Abstract
We refine the implementation of ensemble fermions for the electroweak sector of the Standard Model, introduced previously. We consider the behavior of different observables as the size of the ensemble is increased and show that the dynamics converges for ensemble sizes small enough that simulations of the entire electroweak sector become numerically tractable. We apply the method to the computation of the effective preheating temperature during a fast electroweak transition, relevant for Cold Electroweak Baryogenesis. We find that this temperature is never below 20 GeV, and this in combination with the early results convincingly rules out Standard Model CP-violation as the origin of the baryon asymmetry of the Universe.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 1.00
What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.24 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.40 · mentions code or data availability 0.03
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| We refine the implementation of ensemble fermions for the electroweak sector of the Standard Model, introduced previously. | contribution 0.78 | 0.84 | 0.02 | asserted 0.93 |
| We consider the behavior of different observables as the size of the ensemble is increased and show that the dynamics converges for ensemble sizes small enough that simulations of the entire electroweak sector become numerically tractable. | result 0.53 | 0.95 | 0.07 | asserted 1.00 |
| We apply the method to the computation of the effective preheating temperature during a fast electroweak transition, relevant for Cold Electroweak Baryogenesis. | contribution 0.92 | 0.92 | 0.05 | asserted 0.95 |
| We find that this temperature is never below 20 GeV, and this in combination with the early results convincingly rules out Standard Model CP-violation as the origin of the baryon asymmetry of the Universe. | interpretation 0.65 | 0.92 | 0.80 | asserted 1.00 |
What kind of paper the classifier reports this is: simulation study 0.88 · evidence from simulation or computation 1.00
What was examined, and what was not
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- arXiv listing abstract v2
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- full text
- figures and tables
- references and citing sentences
- relations to other papers
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- P abstract
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- S sections
- T body sentences
- C citations
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How the labels were made
Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,703 input tokens, $0.0002 reported.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 2 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- The art of simulating the early Universe -- Part I astro-ph.CO · Jun 2020
- Combined Preheating on the lattice with applications to Higgs inflation astro-ph.CO · Apr 2016
How the literature uses it
8 arXiv papers cite this in 14 sentences
Papers whose main result relates to this one's
States a conflicting result 1 paper
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Our results suggest that the cold electroweak baryogenesis scenario may be viable within the Standard Model, provided the electroweak transition temperature is at most of order 1 GeV.
Temperature Dependence of Standard Model CP Violation · 0.90
Papers citing it · 12 sentences without a confident label
Uses its method or tool 1 paper
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For details on the numerical implementation of this method, we refer to [ref] , and to the appendices in the present paper.
Cold Baryogenesis from first principles in the Two-Higgs Doublet model with Fermions · Results · 1.00
Cites it as background 1 paper
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This is well known in fermion lattice field theories and goes by the name of fermion doubling [ref] .
Floquet insulators and lattice fermions beyond naive time discretization · Introduction · 0.88
What it cites · 13 sentences without a confident label
Uses the method or tool of 3 papers
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The continuum model above is discretized on a lattice of $V/a^3=N^3$ sites, as described in [ref] .
Dynamical simulations of electroweak baryogenesis with fermions · Ensemble fermions · 0.99
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Alternatively one may replace quantum averages by ensemble averages, as discussed in [ref] .
Low-cost fermions in classical field simulations · Ensemble fermions · 0.80
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Alternatively one may replace quantum averages by ensemble averages, as discussed in [ref] .
Real-time Fermions for Baryogenesis Simulations · Ensemble fermions · 0.80
Uses data or values from 2 papers
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Bosonic simulations suggest, that the coefficient should be of order $10^-6$ in some normalization [ref] , corresponding to an effective temperature in the fermions of around $1$ GeV.
Cold electroweak baryogenesis with Standard Model CP violation · Fermion temperature in Cold Electroweak Baryogenesis · 0.93
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In [ref] , it was found that for small values of $λ_yuk$, $N_q≃10000$ gave convergence of the fermion number observable $N_f$.
Dynamical simulations of electroweak baryogenesis with fermions · Ensemble fermions · 0.90
Compares with 1 paper
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This is a reduction of the numerical effort by an order of magnitude, compared to what was anticipated in [ref] , making the method viable for modelling the entire electroweak sector.
Dynamical simulations of electroweak baryogenesis with fermions · Conclusion · 0.86
Cites as background 8 papers
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But extensive work has also gone into the possibility that the CP-violation already present in the Standard Model through the complex phase in the CKM matrix may be sufficient [ref] .
Temperature Dependence of Standard Model CP Violation · Fermion temperature in Cold Electroweak Baryogenesis · 0.92
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But extensive work has also gone into the possibility that the CP-violation already present in the Standard Model through the complex phase in the CKM matrix may be sufficient [ref] .
CP violation in the effective action of the Standard Model · Fermion temperature in Cold Electroweak Baryogenesis · 0.92
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But extensive work has also gone into the possibility that the CP-violation already present in the Standard Model through the complex phase in the CKM matrix may be sufficient [ref] .
Computing the temperature dependence of effective CP violation in the standard model · Fermion temperature in Cold Electroweak Baryogenesis · 0.92
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