Tootfinder

Bias with a Timer: Axion Domain Wall Decay and Dark Matter
Sally Yuxuan Hao, Shota Nakagawa, Yuichiro Nakai, Motoo Suzuki
https://arxiv.org/abs/2507.12268 …

Bias with a Timer: Axion Domain Wall Decay and Dark Matter
We explore the interplay of the post-inflationary QCD axion and a light scalar field for the axion domain wall decay and dark matter (DM). The scalar field possesses a nonzero vacuum expectation value (VEV) during inflation, so that its interaction with the axion effectively serves as an explicit Peccei-Quinn (PQ) violating term. At a temperature below the PQ phase transition, the effective PQ violating interaction generates the axion potential which generally contains multiple degenerate vacua…

An Exploration of Vacuum-Decay Valleys
J. R. Espinosa, T. Konstandin
https://arxiv.org/abs/2506.06154 https://arxiv.org/pdf/2506.0615…

An Exploration of Vacuum-Decay Valleys
In the standard lore the decay of the false vacuum of a single-field potential is described by a semi-classical Euclidean bounce configuration that can be found using overshoot/undershoot algorithms, and whose action suppresses exponentially the decay rate. While this is generically correct, we show in a few concrete examples of potentials, previously studied in the literature for other purposes, that the vacuum decay structure can be far richer. In some cases there is no bounce and decay proce…

An infrared bound on the ultraviolet bounce
Mehrdad Mirbabayi, Giovanni Villadoro
https://arxiv.org/abs/2506.09842 https://arxiv.org/…

An infrared bound on the ultraviolet bounce
Sometimes a local minimum is known to be a metastable vacuum inside the low-energy EFT, but the true vacuum lies outside, and the bounce solution mediating the decay cannot be found. For single-field decay, Espinosa has proposed a family of configurations called ``pseudo-bounces'' as a way to constrain the decay rate. They are parametrized by the central field value $Φ_0$ and constructed without the knowledge of the true vacuum. We prove that the pseudo-bounce family has a monotonically decrea…

Vacuum Instability and False Vacuum Decay Induced by Domain Walls in the N2HDM
Mohamed Younes Sassi, Gudrid Moortgat-Pick
https://arxiv.org/abs/2506.14880 …

Vacuum Instability and False Vacuum Decay Induced by Domain Walls in the N2HDM
The Next-to-Two-Higgs-Doublet model (N2HDM) has a rich vacuum structure where multiple electroweak (EW) breaking minima, as well as CP and electric-charge breaking minima, can coexist. These minima can be deeper than the electroweak vacuum $v_{ew} \approx 246\text{ GeV}$ of our universe, making our vacuum metastable. In such a case, one needs to calculate the tunneling rate from the EW vacuum to the deeper minimum. If the lifetime of the EW vacuum is longer than the universe's age, our vacuum i…

Dynamical Phase Transition of Dissipative Fermionic Superfluids
Xin-Yuan Gao, Yangqian Yan
https://arxiv.org/abs/2506.05770 https://a…

Dynamical Phase Transition of Dissipative Fermionic Superfluids
Driven-dissipative open quantum many-body systems exhibit rich phases that are characterized by the steady states in the long-time dynamics. However, lossy open systems inevitably decay to the vacuum, making their transient evolution the primary focus. Assuming the Hartree-Fock-Bogoliubov ansatz, we derive a generalized time-dependent Hartree-Fock-Bogoliubov equation based on the least action principle for open quantum systems. By solving the quench dynamics after abruptly introducing inelastic…

Global Existence and Incompressible Limit for Compressible Navier-Stokes Equations with Large Bulk Viscosity Coefficient and Large Initial Data
Qinghao Lei, Chengfeng Xiong
https://arxiv.org/abs/2507.01432

Global Existence and Incompressible Limit for Compressible Navier-Stokes Equations with Large Bulk Viscosity Coefficient and Large Initial Data
For periodic initial data with the density allowing vacuum, we establish the global existence and exponential decay of weak, strong and classical solutions to the two-dimensional(2D) compressible Navier-Stokes equations when the bulk viscosity coefficient is sufficiently large, without any extra restrictions on initial velocity divergence. Moreover, we demonstrate that when the bulk viscosity coefficient tends to infinity, these solutions converge to solutions to the inhomogeneous incompressibl…

This https://arxiv.org/abs/2412.16047 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Rare multi-nucleon decays with the full data sets of the Majorana Demonstrator
The Majorana Demonstrator was an ultra-low-background experiment designed for neutrinoless double-beta decay ($0νββ$) investigation in $^{76}$Ge. Located at the Sanford Underground Research Facility in Lead, South Dakota, the Demonstrator utilized modular high-purity Ge detector arrays within shielded vacuum cryostats, operating deep underground. The arrays, with a capacity of up to 40.4 kg (27.2 kg enriched to $\sim 88\%$ in $^{76}$Ge), have accumulated the full data set, totaling 64.5 kg y…

Plasma refilling of the lunar wake: plasma-vacuum interactions, electrostatic shocks, and electromagnetic instabilities
Xin An, Vassilis Angelopoulos, Terry Z Liu, Anton Artemyev, Andrew R. Poppe, Donglai Ma
https://arxiv.org/abs/2505.12497

Plasma refilling of the lunar wake: plasma-vacuum interactions, electrostatic shocks, and electromagnetic instabilities
A plasma void forms downstream of the Moon when the solar wind impacts the lunar surface. This void gradually refills as the solar wind passes by, forming the lunar wake. We investigate this refilling process using a fully kinetic particle-in-cell (PIC) simulation. The early stage of refilling follows plasma-vacuum interaction theory, characterized by exponential decay of plasma density into the wake, along with ion acceleration and cooling in the expansion direction. Our PIC simulation confirm…

Comparison of chiral limit studies in curvature mass versus on-shell renormalized quark-meson model using ChPT
Vivek Kumar Tiwari
https://arxiv.org/abs/2507.04597

Comparison of chiral limit studies in curvature mass versus on-shell renormalized quark-meson model using ChPT
Consistent chiral limit has been investigated in the curvature mass parametrized quark-meson (QM) model with the quark one-loop vacuum term (QMVT) employing the infrared regularized Chiral perturbation theory (ChPT) predicted scaling of the pion,~kaon decay constants $f_π, f_{K} $ and $M_η^2 = m_η^2 + m_{η^{\prime}}^2 $ when the $π\ \text{and} \ K $ meson masses are reduced as one moves away from the physical point in the Columbia plot.~Comparing the QMVT model Columbia plots with the corr…

Stability of non-supersymmetric vacua from calibrations
Vincent Menet, Alessandro Tomasiello
https://arxiv.org/abs/2507.02787 https://

Stability of non-supersymmetric vacua from calibrations
Supersymmetric vacua are protected from vacuum decay by energy positivity. No such argument is known for any non-supersymmetric vacua. In this paper, we try to extend to the latter a simpler argument based on calibrations, to at least protect them from decays mediated by D-brane bubbles, including their abelian bound states. We examine several classes of AdS$_4$ and AdS$_5$ solutions in type II string theory, including some new ones, involving coset spaces, sphere fibrations, Kähler--Einstein …