A bstract Computing the properties of bubble wall a cosmological first order phase transition at electroweak scale is paramount importance for correct prediction baryon asymmetry universe and spectrum gravitational waves. By means semiclassical formalism we calculate velocity thickness using as theoretical framework scalar singlet extension SM with parity symmetry effective field theory supplemented by dimension six operator. We use these solutions to carefully predict wave signals. The...

A bstract We study the possible gravitational wave signal and viability of baryogenesis arising from electroweak phase transition in an extension Standard Model (SM) by a scalar singlet field without ℤ 2 symmetry. first analyze velocity expanding true-vacuum bubbles during transition, confirming our previous finding unbroken symmetry scenario, where bubble wall can be computed principles only for weak transitions with strength parameters α ≲ 0 . 05, Chapman-Jouguet defines maximum which is...

We perform real-time hydrodynamical simulations of the growth bubbles formed during cosmological first-order phase transitions under assumption local thermal equilibrium. confirm that pure hydrodynamic backreaction can lead to steady-state expansion and bubble-wall velocity in such case agrees very well with analytical estimates. However, this is not generic outcome. Instead, it much more common observe runaways, as early-stage dynamics right after nucleation allow bubble walls achieve...

The authors use numerical lattice simulations to study bubble nucleation in cosmological phase transitions. terminal velocity is an important parameter for the primordial gravitational wave spectrum as well electroweak (EW) baryogenesis. They are able extreme space that most promising these phenomena. However, they find a hydrodynamical obstruction creates gap excludes models EW baryogenesis, making it improbable contribute solution of baryon asymmetry problem.

A bstract We study the evolution of growing vacuum bubbles. The bubble walls interact with surrounding fluid and may, consequently, reach a terminal velocity. If mean free path particles in is much shorter than wall thickness, locally thermal equilibrium wall’s velocity can be determined by entropy conservation. On other hand, if local inside cannot maintained, estimated from pressure impacted ballistic particle dynamics at wall. find that latter case leads to slightly slower walls....

A bstract We perform real-time hydrodynamical simulations of the growth bubbles formed during cosmological first-order phase transitions under assumption local thermal equilibrium. confirm that pure hydrodynamic backreaction can lead to steady-state expansion and bubble-wall velocity in such case agrees very well with analytical estimates. However, this is not generic outcome. Instead, it much more common observe runaways, as early-stage dynamics right after nucleation allow bubble walls...

A bstract The detection of a stochastic Gravitational Wave (GW) background sourced by cosmological phase transition would allow us to see the early Universe from completely new perspective, illuminating aspects Beyond Standard Model (BSM) physics and inflationary cosmology. In this study, we investigate whether evolution scalar potential minimal SM extension after inflation can lead strong first-order transition. particular, focus on BSM spectator field that is non-minimally coupled gravity...

Abundances of beryllium in metal-poor stars scale linearly with metallicity down to [Fe/H] ~ -3.0. In the where Be has been detected at this extremely regime, an increased abundance scatter previously reported. This could indicate a flattening relation between and [Fe/H]. Our aim is perform new investigation abundances try clarify whether plateau exists. We revisited sample nine dwarfs Additionally, we analysed lines spectra BPS BS 16968-0061 CD-33 1173 for first time. took advantage Gaia...

Understanding that interoperable security playbooks will become a fundamental component of defenders' arsenal to decrease attack detection and response times, it is time consider their position in structured sharing efforts. This report documents the process extending Structured Threat Information eXpression (STIX) version 2.1, using available extension definition mechanism, enable playbooks, including Collaborative Automated Course Action Operations (CACAO) playbooks.

We study the evolution of growing vacuum bubbles. The bubble walls interact with surrounding fluid and may, consequently, reach a terminal velocity. If mean free path particles in is much shorter than wall thickness, locally thermal equilibrium wall's velocity can be determined by entropy conservation. On other hand, if local inside cannot maintained, estimated from pressure impacted ballistic particle dynamics at wall. find that latter case leads to slightly slower walls. Expectedly, we...

We investigate the hydrodynamic solutions for expanding bubbles in cosmological first-order phase transitions going beyond local thermal equilibrium approximation. Under assumption of a tangenosidal field profile, we supplement matching conditions with entropy produced due to interaction bubble wall ambient plasma. This allows us analytically compute corresponding fluid profiles and find bubble-wall velocity. show that production, two stable deflagration or hybrid detonation can coexist....

As cyber systems become increasingly complex and cybersecurity threats more prominent, defenders must prepare, coordinate, automate, document, share their response methodologies to the extent possible. The CACAO standard was developed satisfy above requirements providing a common machine-readable framework schema document operations processes, including defensive tradecraft tactics, techniques, procedures. Although this approach is compelling, remaining limitation that provides no native...

Terminal velocity reached by bubble walls in first order phase transitions is an important parameter determining both primordial gravitational-wave spectrum and production of baryon asymmetry models electroweak baryogenesis. We developed a numerical code to study the real-time evolution expanding bubbles investigate how their reach stationary states. Our results agree with profiles obtained within so-called bag model very good accuracy, however, not all such solutions are stable realised...

As cyber systems become increasingly complex and cybersecurity threats more prominent, defenders must prepare, coordinate, automate, document, share their response methodologies to the extent possible. The CACAO standard was developed satisfy above requirements, providing a common machine-readable framework schema for documenting operations processes, including defensive tradecraft tactics, techniques, procedures. Although this approach is compelling, remaining limitation that provides no...

The detection of a stochastic Gravitational Wave (GW) background sourced by cosmological phase transition would allow us to see the early Universe from completely new perspective, illuminating aspects Beyond Standard Model (BSM) physics and inflationary cosmology. In this study, we investigate whether evolution scalar potential minimal SM extension after inflation can lead strong first-order transition. particular, focus on BSM spectator field that is non-minimally coupled gravity has...

In this paper, we enhance the machine-readable representation of ATT&CK Groups knowledge base provided by MITRE in STIX 2.1 format to make available and queryable additional types contextual information. Such information includes motivations activity groups, countries they have originated from, sectors targeted. We demonstrate how utilize enhanced model construct intelligible queries filter groups interest retrieve relevant tactical intelligence.

We study the possible gravitational wave signal and viability of baryogenesis arising from electroweak phase transition in an extension Standard Model (SM) by a scalar singlet field without $\mathbb{Z}_2$ symmetry. first analyze velocity expanding true-vacuum bubbles during transition, confirming our previous finding unbroken symmetry scenario, where bubble wall can be computed principles only for weak transitions with strength parameters $α\lesssim 0.05$, Chapman-Jouguet defines maximum...