Peter Athron
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View article: New Physics Search at the CEPC: a General Perspective
New Physics Search at the CEPC: a General Perspective Open
The Circular Electron-Positron Collider (CEPC), a proposed next-generation Higgs factory, provides new opportunities to explore physics beyond the Standard Model (SM). With its clean electron-positron collision environment and the ability …
View article: PhaseTracer2: from the effective potential to gravitational waves
PhaseTracer2: from the effective potential to gravitational waves Open
In recent years, the prospect of detecting gravitational waves sourced from a strongly first-order cosmological phase transition has emerged as one of the most exciting frontiers of gravitational wave astronomy. Cosmological phase transiti…
View article: Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array
Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array Open
Blue-tilted Gravitational Waves (BGWs) have been proposed as a potential candidate for the cosmic gravitational waves detected by Pulsar Timing Arrays (PTA). In the standard cosmological framework, BGWs are constrained in their frequency r…
View article: Electroweak baryogenesis from charged current anomalies in $B$ meson decays
Electroweak baryogenesis from charged current anomalies in $B$ meson decays Open
We demonstrate for the first time that new physics explaining the long standing charged $B$ meson anomalies, $R(D^{(*)})$, can be the source of CP violation that explains the observed baryon asymmetry of the universe (BAU). We consider the…
View article: Flavor Physics at the CEPC: a General Perspective
Flavor Physics at the CEPC: a General Perspective Open
We discuss the landscape of flavor physics at the Circular Electron-Positron Collider (CEPC), based on the nominal luminosity outlined in its Technical Design Report. The CEPC is designed to operate in multiple modes to address a variety o…
View article: Flavourful global fit to LHCb data with the general two Higgs doublet model: An update
Flavourful global fit to LHCb data with the general two Higgs doublet model: An update Open
We perform a global fit to the two Higgs doublet model (2HDM) with generic sources of flavour violation using GAMBIT. This is particularly interesting in light of significant deviations from the Standard Model predictions, such as the flav…
View article: PhaseTracer2: from the effective potential to gravitational waves
PhaseTracer2: from the effective potential to gravitational waves Open
In recent years, the prospect of detecting gravitational waves sourced from a strongly first-order cosmological phase transition has emerged as one of the most exciting frontiers of gravitational wave astronomy. Cosmological phase transiti…
View article: Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array
Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array Open
Blue-tilted Gravitational Waves (BGWs) have been proposed as a potential candidate for the cosmic gravitational waves detected by Pulsar Timing Arrays (PTA). In the standard cosmological framework, BGWs are constrained in their frequency r…
View article: Global fit to the 2HDM with generic sources of flavour violation using GAMBIT
Global fit to the 2HDM with generic sources of flavour violation using GAMBIT Open
A bstract We perform a global statistical analysis of the two-Higgs-doublet model with generic sources of flavour violation using GAMBIT. This is particularly interesting in light of deviations from the Standard Model predictions observed …
View article: Global fit to the 2HDM with generic sources of flavour violation using \textsf{GAMBIT}
Global fit to the 2HDM with generic sources of flavour violation using \textsf{GAMBIT} Open
We perform a global statistical analysis of the two-Higgs-doublet model with generic sources of flavour violation using \textsf{GAMBIT}. This is particularly interesting in light of deviations from the Standard Model predictions observed i…
View article: Can Supercooled Phase Transitions Explain the Gravitational Wave Background Observed by Pulsar Timing Arrays?
Can Supercooled Phase Transitions Explain the Gravitational Wave Background Observed by Pulsar Timing Arrays? Open
Several pulsar timing array collaborations recently reported evidence of a stochastic gravitational wave background (SGWB) at nHz frequencies. While the SGWB could originate from the merger of supermassive black holes, it could be a signat…
View article: B meson anomalies and large $$ {B}^{+}\to {K}^{+}\nu \overline{\nu} $$ in non-universal U(1)′ models
B meson anomalies and large $$ {B}^{+}\to {K}^{+}\nu \overline{\nu} $$ in non-universal U(1)′ models Open
A bstract In view of both the latest LHCb measurement of $$ {R}_{K^{\left(\ast \right)}} $$ and the new 2 . 7 σ deviation reported by Belle II on $$ {B}^{+}\to {K}^{+}\nu \overline{\nu} $$ decays, we present a fit to the…
View article: How robust are gravitational wave predictions from cosmological phase transitions?
How robust are gravitational wave predictions from cosmological phase transitions? Open
Gravitational wave (GW) predictions of cosmological phase transitions are almost invariably evaluated at either the nucleation or percolation temperature. We investigate the effect of the transition temperature choice on GW predictions, fo…
View article: $B$ meson anomalies and large $B^{+}\to K^{+}ν\barν$ in non-universal $U(1)^\prime$ models
$B$ meson anomalies and large $B^{+}\to K^{+}ν\barν$ in non-universal $U(1)^\prime$ models Open
In view of both the latest LHCb measurement of $R_{K^{(*)}}$ and the new $2.8σ$ deviation reported by Belle II on $B^{+}\to K^{+}ν\barν$ decays, we present a fit to the $B$ meson anomalies for various one and two dimensional hypothesis inc…
View article: Falsifying Pati-Salam models with LIGO
Falsifying Pati-Salam models with LIGO Open
We demonstrate that existing gravitational wave data from LIGO already places constraints on well motivated Pati-Salam models that allow the Standard Model to be embedded within grand unified theories. For the first time in these models we…
View article: Can supercooled phase transitions explain the gravitational wave background observed by pulsar timing arrays?
Can supercooled phase transitions explain the gravitational wave background observed by pulsar timing arrays? Open
Several pulsar timing array collaborations recently reported evidence of a stochastic gravitational wave background (SGWB) at nHz frequencies. Whilst the SGWB could originate from the merger of supermassive black holes, it could be a signa…
View article: Cosmological phase transitions: from perturbative particle physics to gravitational waves
Cosmological phase transitions: from perturbative particle physics to gravitational waves Open
Gravitational waves (GWs) were recently detected for the first time. This revolutionary discovery opens a new way of learning about particle physics through GWs from first-order phase transitions (FOPTs) in the early Universe. FOPTs could …
View article: Supercool subtleties of cosmological phase transitions
Supercool subtleties of cosmological phase transitions Open
We investigate rarely explored details of supercooled cosmological first-order phase transitions at the electroweak scale, which may lead to strong gravitational wave signals or explain the cosmic baryon asymmetry. The nucleation temperatu…
View article: Hadronic uncertainties versus new physics for the W boson mass and Muon g − 2 anomalies
Hadronic uncertainties versus new physics for the W boson mass and Muon g − 2 anomalies Open
View article: How arbitrary are perturbative calculations of the electroweak phase transition?
How arbitrary are perturbative calculations of the electroweak phase transition? Open
A bstract We investigate the extent to which perturbative calculations of the electroweak phase transition are arbitrary and uncertain, owing to their gauge, renormalisation scale and scheme dependence, as well as treatments of the Goldsto…
View article: Supercool subtleties of cosmological phase transitions
Supercool subtleties of cosmological phase transitions Open
We investigate rarely explored details of supercooled cosmological first-order phase transitions at the electroweak scale, which may lead to strong gravitational wave signals or explain the cosmic baryon asymmetry. The nucleation temperatu…
View article: Precise calculation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math> boson pole mass beyond the standard model with FlexibleSUSY
Precise calculation of the boson pole mass beyond the standard model with FlexibleSUSY Open
We present an updated calculation of the $W$ boson pole mass in models beyond the standard model with FlexibleSUSY. The calculation has a decoupling behavior and allows for a precise $W$-pole mass prediction up to large new physics scales.…
View article: FlexibleDecay: An automated calculator of scalar decay widths
FlexibleDecay: An automated calculator of scalar decay widths Open
View article: How arbitrary are perturbative calculations of the electroweak phase transition?
How arbitrary are perturbative calculations of the electroweak phase transition? Open
We investigate the extent to which perturbative calculations of the electroweak phase transition are arbitrary and uncertain, owing to their gauge, renormalisation scale and scheme dependence, as well as treatments of the Goldstone catastr…
View article: Likelihood analysis of the general 2HDM with Gambit's FlavBit
Likelihood analysis of the general 2HDM with Gambit's FlavBit Open
We present a likelihood analysis of the general two Higgs doublet model, using the most important currently measured flavour observables, in view of the anomalies in charged current tree-level and neutral current one-loop rare decays of $B…
View article: GM2Calc - 2 for the 2HDM
GM2Calc - 2 for the 2HDM Open
GM2Calc is a leading tool for calculating precise contributions to $a_\\mu$ in\nthe Minimal Supersymmetric Standard Model. In this proceeding we detail GM2Calc\nversion 2 where it is extended so it can calculate two-loop contributions to\n…
View article: Global fits of SUSY at future Higgs factories
Global fits of SUSY at future Higgs factories Open
In this work, we study the impact of electroweak and Higgs precision measurements at future electron-positron colliders on several typical supersymmetric models, including the Constrained Minimal Supersymmetric Standard Model (CMSSM), Non-…
View article: Simple and statistically sound recommendations for analysing physical theories
Simple and statistically sound recommendations for analysing physical theories Open
Physical theories that depend on many parameters or are tested against data from many different experiments pose unique challenges to statistical inference. Many models in particle physics, astrophysics and cosmology fall into one or both …
View article: Precise calculation of the W boson pole mass beyond the Standard Model with FlexibleSUSY
Precise calculation of the W boson pole mass beyond the Standard Model with FlexibleSUSY Open
We present an updated calculation of the W boson pole mass in models beyond the Standard Model with FlexibleSUSY. The calculation has a decoupling behaviour and allows for a precise W pole mass prediction up to large new physics scales. We…
View article: Hadronic Uncertainties versus New Physics for the $W$ boson Mass and Muon $g-2$ Anomalies
Hadronic Uncertainties versus New Physics for the $W$ boson Mass and Muon $g-2$ Anomalies Open
There are now two single measurements of precision observables that have major anomalies in the Standard Model: the recent CDF measurement of the $W$ mass shows a $7σ$ deviation and the Muon $g-2$ experiment at FNAL confirmed a long-standi…