Tootfinder

This https://arxiv.org/abs/2302.06820 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Quark clusters, QCD vacuum and the cosmological 7Li, Dark Matter and Dark Energy problems
We propose a non-exotic electromagnetic solution (within the standard model of particle physics) to the cosmological 7Li problem based upon a narrow 2 MeV photo-emission line from the decay of light Glueballs (LGBs). These LGBs form within color superconducting, tens of Fermi in size, quark clusters (SQCs) in the radiation-dominated post-BBN epoch. The mono-chromatic line from the LGB -> gamma+gamma decay reduces Big-Bang nucleosynthesis (BBN) 7Be by 2/3 without affecting other abundances or CM…

Symmetry restoration and vacuum decay from accretion around black holes
James Marsden, Josu C. Aurrekoetxea, Katy Clough, Pedro G. Ferreira
https://arxiv.org/abs/2403.17595

Symmetry restoration and vacuum decay from accretion around black holes
Vacuum decay and symmetry breaking play an important role in the fundamental structure of the matter and the evolution of the universe. In this work we study how the purely classical effect of accretion of fundamental fields onto black holes can lead to shells of symmetry restoration in the midst of a symmetry broken phase. We also show how it can catalyze vacuum decay, forming a bubble that expands asymptotically at the speed of light. These effects offer an alternative, purely classical mecha…

Q: "What would vacuum decay look like if it occurred far away and spread towards us?"
A: "If a patch of spacetime anywhere in the universe were to change state, the change would radiate from there to the rest of the universe as a sort of “shock front” that propagated at the speed of light. That means we wouldn’t see it coming. We wouldn’t see any effect from it at all, and when it washed over us, we’d simply cease to exist."
God: ARE YOU NOT ENTERTAINED?

This https://arxiv.org/abs/2205.05660 has been replaced.
link: https://scholar.google.com/scholar?q=a

Energy relaxation in a vacuum capacitor-resistor circuit: measurement of multiple decays with divergent time constants
The decay of the electrical energy in a resistor-vacuum capacitor circuit is shown to involve multiple relaxation processes, with dramatically different time constants. This is measured using a vacuum capacitor to eliminate the effect of a dielectric between the plates (polypropylene capacitors are shown to exhibit similar behavior). A simple phenomenological model accounts for this behavior in spite of the difficulty in applying Maxwell's equations to such a circuit. These results will lead to…

This https://arxiv.org/abs/2401.13131 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

The process of constructing new knowledge: an undergraduate laboratory exercise facilitated by a vacuum capacitor-resistor circuit
The process of constructing knowledge is typically taught to students by having them reproduce established results (e.g., homework problems). An alternative pedagogical strategy is to illustrate this process using an open problem, such as voltage decay in an RC circuit as described below. Analyzing data from this circuit in an undergraduate physics laboratory course reveals a discrepancy between the data and the exponential decay model found in textbooks. As students attempt to reconcile this d…

This https://arxiv.org/abs/2312.04482 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

False vacuum decay rates, more precisely
We develop a method for accurately calculating vacuum decay rates beyond the thin-wall regime in a pure scalar field theory at the one-loop level of the effective action. It accounts for radiative effects resulting from quantum corrections to the classical bounce, including gradient effects stemming from the inhomogeneity of the bounce background. To achieve this, it is necessary to compute not only the functional determinant of the fluctuation operator in the background of the classical bounce…

Enhancement of Entanglement via Josephson Parametric Amplifier in a Dual Cavity-Magnon System
Abdelkader Hidki, Abderrahim Lakhfif, Mostafa Nassik, Rizwan Ahmed, Amjad Sohail
https://arxiv.org/abs/2402.16042

Enhancement of Entanglement via Josephson Parametric Amplifier in a Dual Cavity-Magnon System
In the two microwave (MW) cross-shaped cavity magnon system, we describe a method to produce multipartite entanglement and quantum steering. To achieve squeezed states of the magnons, a Josephson parametric amplifier (JPA) creates a squeezed vacuum field that drives the two cavities. We theoretically demonstrate that the cavity-cavity entanglement can be generated at the resonance point, however, increasing the cavity and magnon decay rates generate the cavity-magnon entanglement. By changing t…

This https://arxiv.org/abs/2403.00443 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Amplitude modulations and resonant decay of excited oscillons
We show that the decay of strongly excited oscillons in a single vacuum model reveals a chaotic, fractal-like pattern very much like one found in kink-antikink collision in the $ϕ^4$ model. This structure can be attributed to the resonant energy transfer mechanism triggered by the modulations of amplitudes of constituent oscillons which form the excited oscillon. We also find evidence that such modulations arise as a motion of two quasi-breathers inside the constituent oscillon.

Identifying the transverse and longitudinal modes of the $K^*$ and $K_{1}$ mesons through their angular dependent decay modes
In Woo Park, Hiroyuki Sako, Kazuya Aoki, Philipp Gubler, Su Houng Lee
https://arxiv.org/abs/2403.18288

Identifying the transverse and longitudinal modes of the $K^*$ and $K_{1}$ mesons through their angular dependent decay modes
Observing the mass shifts of chiral partners will provide invaluable insight into the role of chiral symmetry breaking in the generation of hadron masses. Because both the $K^*$ and $K_1$ mesons have vacuum widths smaller than 100 MeV, they are ideal candidates for realizing mass shift measurements. On the other hand, the different momentum dependence of the longitudinal and transverse modes smear the peak positions. In this work, we analyze the angular dependence of the two-body decays of both…

Enhancement of Entanglement via Josephson Parametric Amplifier in a Dual Cavity-Magnon System
Abdelkader Hidki, Abderrahim Lakhfif, Mostafa Nassik, Rizwan Ahmed, Amjad Sohail
https://arxiv.org/abs/2402.16042

Enhancement of Entanglement via Josephson Parametric Amplifier in a Dual Cavity-Magnon System
In the two microwave (MW) cross-shaped cavity magnon system, we describe a method to produce multipartite entanglement and quantum steering. To achieve squeezed states of the magnons, a Josephson parametric amplifier (JPA) creates a squeezed vacuum field that drives the two cavities. We theoretically demonstrate that the cavity-cavity entanglement can be generated at the resonance point, however, increasing the cavity and magnon decay rates generate the cavity-magnon entanglement. By changing t…

A Brief Survey of Fluctuation-induced Interactions in Micro- and Nano-systems and One Exactly Solvable Model as Example
Daniel Dantchev, Nicholay Tonchev
https://arxiv.org/abs/2403.17109

A Brief Survey of Fluctuation-induced Interactions in Micro- and Nano-systems and One Exactly Solvable Model as Example
Fluctuations exist in any material object $A$. If $A$ has non-zero temperature $T$, one speaks about thermal fluctuations. If $A$ is at very low $T$, the fluctuations are of quantum origin. Interesting effects appear if two bodies $A$ and $B$ are separated by a fluctuating medium $C$ (say a vacuum, or a fluid close to its {\it critical point}) when the fluctuations are long-ranged, i.e., they decay according to a power-law with the distance. Then the changes of fluctuations in $C$ due to the su…

Delicate curvature bounces in the no-boundary wave function and in the late universe
Jean-Luc Lehners, Jerome Quintin
https://arxiv.org/abs/2403.15205 http…

Delicate curvature bounces in the no-boundary wave function and in the late universe
Theoretical considerations motivate us to consider vacuum energy to be able to decay and to assume that the spatial geometry of the universe is closed. Combining both aspects leads to the possibility that the universe, or certain regions thereof, can collapse and subsequently undergo a curvature bounce. This may have occurred in the very early universe, in a pre-inflationary phase. We discuss the construction of the corresponding no-boundary instantons and show that they indeed reproduce a boun…

Vacuum amplitudes and time-like causal unitary in the loop-tree duality
The LTD Collaboration, Selomit Ram\'irez-Uribe, Andr\'es E. Renter\'ia-Olivo, David F. Renter\'ia-Estrada, Jorge J. Mart\'inez de Lejarza, Prasanna K. Dhani, Leandro Cieri, Roger J. Hern\'andez-Pinto, German F. R. Sborlini, William J. Torres Bobadilla, Germ\'an Rodrigo

Vacuum amplitudes and time-like causal unitary in the loop-tree duality
We present the first proof-of-concept application to decay processes at higher perturbative orders of LTD causal unitary, a novel methodology that exploits the causal properties of vacuum amplitudes in the loop-tree duality (LTD) and is directly well-defined in the four physical dimensions of the space-time. The generation of loop- and tree-level contributions to the differential decay rates from a kernel multiloop vacuum amplitude is shown in detail, and explicit expressions are presented for …

Testing Higher Derivative Gravity Through Tunnelling
Ruth Gregory, Shi-Qian Hu
https://arxiv.org/abs/2402.10620 https://arxiv.org/pdf…

Testing Higher Derivative Gravity Through Tunnelling
Higher derivative terms in the gravitational action are natural from the perspective of quantum gravity, but are perceived as leading to a lack of well-posedness. The Gauss Bonnet term has second-order equations of motion, but does not impact gravitational dynamics in 4D, so one might expect that it is not physically relevant. We discuss how signatures can show up in tunnelling processes and whether these will likely be physically accessible in Higgs vacuum decay.

Rewording theoretical predictions at colliders with vacuum amplitudes
Selomit Ram\'irez-Uribe, Prasanna K. Dhani, German F. R. Sborlini, Germ\'an Rodrigo
https://arxiv.org/abs/2404.05491

Rewording theoretical predictions at colliders with vacuum amplitudes
We propose multiloop vacuum amplitudes as the optimal building blocks for efficiently assembling theoretical predictions at high-energy colliders. This hypothesis is strongly supported by the manifestly causal properties of the loop-tree duality (LTD) representation of a vacuum amplitude. The vacuum amplitude, acting as a kernel, encodes all the final states contributing to a given scattering or decay process through residues in the on-shell energies of the internal propagators. It also natural…

An Exotic Path to Glue states Decay
Jean-Marie Fr\`ere
https://arxiv.org/abs/2402.12211 https://arxiv.org/pdf/2402.12211

An Exotic Path to Glue states Decay
Glueballs are the most obvious, but this far not fully tested prediction of Quantum Chromodynamics. The lowest expected glueball states, in particular $0^{++}$ states are difficult to characterize, since they share the quantum numbers of the "vacuum" and of a number of possible quark-antiquark states. In this paper, we argue that the more easily identifiable exotics provide us with strong hints on the way to pursue the chase, and in particular the relation with quantum anomalies and the $η$ an…

This https://arxiv.org/abs/2310.11262 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Kaon Structure in the Nuclear Medium within the Light Front Approach
We study the properties of the charged kaon in symmetric nuclear matter using a Bethe-Salpeter amplitude to model the quark-anti-quark bound state, which is well constrained by previous studies of its vacuum properties. The electromagnetic form factor, charge radius, decay constant and the light-front valence component probability are investigated in symmetric nuclear matter. In order to describe the constituent up and anti-strange quarks in nuclear matter, we adopt the ``quark-meson coupling (…

This https://arxiv.org/abs/2307.13045 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Precision Electroweak Tensions and a Dark Photon
We examine how different assumptions about the hadronic vacuum polarization, the $W$ boson mass, and the forward-backward asymmetry in $b$-quarks at the $Z$ pole can impact the precision electroweak fit. We study the implications for a kinetically mixed dark photon, addressing the complementarity of precision bounds and direct searches, particularly in the case where the dark photon can decay into the dark sector, and we consider implications for future Large Hadron Collider searches. We commen…