Prépublication
· 2026 arXiv
EN
Particle production from bubble collisions during First-Order Phase Transitions (FOPTs) has been studied as an efficient mechanism for baryogenesis and dark matter production, but existing semi-analytical treatments assume runaway bubbles with wall velocity $v...
Fayez Abu-Ajamieh, Amine Ahriche et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
Gravitational waves provide one of the most powerful observational probes for discriminating among inflationary models. In particular, it has recently become clear that the high-frequency gravitational-wave spectrum encodes a wealth of information about the pr...
Naoya Kitajima, Kamil Mudrunka et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
We first derived the formulae of recursive reduction and dlog-form differential equations for arbitrary tree-level cosmological correlator, taking the external relations of massless bulk propagators into consideration. The differential equations could be syste...
Jiaqi Chen, Yi-Xiao Tao et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
We study a two-component dark matter model in which a real singlet scalar and an inert doublet scalar are simultaneously present alongside the Standard Model, each stabilized by an independent discrete symmetry. The real singlet undergoes a strong first-order...
Deeksha Dattaram Naik, Arnab Chaudhuri
#hep-ph
Prépublication
· 2026 arXiv
EN
Hidden sectors are generic in beyond the Standard Model constructions and string compactifications. We consider models featuring hidden sectors that have dark matter candidates. The relic density is set in part by the energy-injecting inflaton branching ratio...
Donald Liveoak, Anshuman Maharana et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
In the standard $Λ\rm CDM$ model, the Universe will keep expanding forever and its lifetime is infinite. Therefore, even the heaviest supermassive black hole will eventually evaporate and the universal occurrence of the black hole information paradox is unavoi...
Ngo Phuc Duc Loc
#hep-ph
Prépublication
· 2026 arXiv
EN
A global haloscope network could turn an axion discovery into astronomy of dark matter substructure and transients. We combine interferometric phase, spatial coherence, and spectroscopy to study the formation and evolution of axion substructure through measure...
Jae Hyeok Chang, Stefano Profumo
#hep-ph
Prépublication
· 2026 arXiv
EN
We point out that for black holes (BH) of the same mass, despite of arising from two entirely different physical arguments, the peak frequency of the coarse-grained gravitational wave (GW) spectrum of gravitons $f_\text{peak}^\text{graviton}$ is very close to...
Ngo Phuc Duc Loc
#hep-ph
Prépublication
· 2026 arXiv
EN
In the minimal type-I seesaw, one right-handed neutrino (RHN) can decouple from neutrino mass generation. Such a state is usually neglected, yet its feeble couplings make it long-lived, and it can dominate the energy density of the Universe before decaying. We...
Stephen F. King, Rishav Roshan et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
The LZ collaboration has recently reported a single nuclear-recoil event at $E_R=248\pm23_\text{stat}\pm23_\text{sys}$ keV, observed in a 2.84 tonne-year exposure with a local significance of $3.4σ$, pointing towards an inelastic dark matter (DM) interpretatio...
Sujit Kumar Sahoo, Narendra Sahu et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
The recently observed dark matter (DM) nuclear recoil event at an energy of $248 \pm 23\,(\text{stat.}) \pm 23\,(\text{syst.})\,\text{keV}$ at the LUX-ZEPLIN (LZ) experiment, favoring an inelastic scattering interpretation, has motivated various beyond the Sta...
Dipankar Pradhan, Abhik Sarkar
#hep-ph
Prépublication
· 2026 arXiv
EN
We study the mixing between a generic axion-like particle (ALP) and the light pseudoscalar mesons within chiral perturbation theory ($χ$PT), and its consequences for low-energy scattering and decay processes. Starting from the most general ALP effective Lagran...
Noé Duarte-González
#hep-ph