Physics Letters B

The third law of black hole dynamics states that it is impossible, through any classical perturbation of a stationary configuration, to reduce the surface gravity of a black hole to zero. In this work, we examine the validity of this law for static, spherically symmetric charged black holes in the Lovelock theory of gravity. By studying infinitesimal variations in mass and charge, we derive a set…

This study employs QCD sum rules to predict the masses and residues of spin- 3 2 doubly heavy baryons including two heavy quarks (c and/or b) and one light quark, specifically focusing on Ξ c c * , Ξ b c * , Ξ b b * , Ω c c * , Ω b c * and Ω b b * . Our study provides results for the ground state (1 S ), first orbital excitation (1 P ), and the first radial excitation (2 S ), within a consistent …

• A Finsler–Randers cosmological framework is developed by incorporating anisotropic geometric corrections through a model-independent parametrization of the deceleration parameter q(z). • Cosmological parameters are constrained using a joint analysis of Cosmic Chronometers (CC), DESI BAO, and DES Y5 Type Ia supernova datasets. • The combined dataset yields the best-fit parameters H 0 = 68.16 ± 0…

The inflationary paradigm has transformed our understanding of the early universe; yet most inflationary models are considered geodesically past-incomplete, suggesting a beginning of time or a primordial Big Bang singularity. The Borde–Guth–Vilenkin (BGV) theorem is often cited as demonstrating that all eternally inflating spacetimes must be past-incomplete. Utilizing a new theorem establishing g…

Neutrinos can experience fast flavor conversions (FFCs) in highly dense astrophysical environments, such as core-collapse supernovae and neutron star mergers, potentially affecting energy transport and other processes. The simulation of fast flavor conversions under realistic astrophysical conditions requires substantial computational resources and involves significant analytical challenges. Whil…

We consider spherically symmetric static black hole configurations that obey the vacuum equation of state: p r = − ρ , where p r is the radial pressure, ρ being energy density. We find in a closed form the metric for an arbitrary equation of state for tangential pressure p θ ( ρ ). The corresponding formulas enable us to embrace compact Schwarzschild-like configurations and dispersed systems. The…

We investigate quantum entanglement and coherence for four classes of Bell-like fermionic states in the vicinity of the event horizon of a Garfinkle-Horowitz-Strominger (GHS) dilaton black hole. Contrary to the common expectation that maximally entangled states always provide superior quantum resources, our results show that their entanglement can be lower than that of suitably chosen non-maximal…

Laser-controlled nuclear decay offers a new pathway for manipulating nuclear lifetimes. In this study, a novel scheme was proposed to indirectly manipulate α decay via electron screening in the scenario of laser-heated nanoclusters. We established a framework of the density-gradient-corrected screening model for the dynamically expanded cluster plasma, where the nonlocal effects on electron scree…

We introduce a method called resolution refinement that allows one to bootstrap eigenstate preparation on a quantum computer. We first prepare an eigenstate of a low-resolution Hamiltonian using any method of choice. The eigenstate is then lifted to higher resolution and adiabatically evolved to produce the corresponding eigenstate of a higher-fidelity Hamiltonian. We give examples of resolution …

The new isotopes, 235Bk and its α-decay daughter 231Am, were investigated using the gas-filled recoil separator SHANS2. They were identified by measuring radioactive decay chains originating from 235Bk, which was produced via the 197Au(40Ar, 2n)235Bk reaction. Three correlated α-decay chains were assigned to 235Bk, from which the α-particle energy of 235Bk was measured to be 7632(17) keV. For 231…

The complexity of microscopic nuclear many-body wave functions hindered a deeper understanding of nucleon clustering driven by complex nucleon-nucleon correlations. To address this, a universal four-fermion formation framework (U4F) is developed within the configuration-interaction shell model. The U4F enables microscopic analysis of the α component in mixed quartet configurations and reveals the…

We show that quartic modifications of relativistic dispersion relations arise generically from deformation-quantized phase spaces under minimal kinematical assumptions relevant to quantum gravity. When the kinematics admits an integral symplectic structure, a compatible almost-complex structure, and a gauge-invariant two-form sector, the leading Planck-scale correction is controlled by a single g…

Recent progress suggests that Hawking radiation originates not from the black hole’s event horizon but from a quantum atmosphere outside the horizon. Consider this, the current work focuses on revealing the effect of the quantum atmosphere on various quantum resources in the Schwarzschild black hole, including nonlocal advantage of quantum coherence (NAQC), Bell nonlocality, quantum steering, and…

We apply Bayesian inference to the order-by-order chiral perturbation theory ( χ PT) expansions for the axial-vector coupling constant g A and the nucleon mass m N , and thereby infer the scales at which χ PT breaks down for these two observables. Using a pointwise Bayesian analysis, we find that the inferred breakdown scales are notably different for the two observables. For the chiral expansion…

Tensor-polarized twist-3 parton distribution functions (PDFs) $f_{LT}(x)$ are calculated for the spin-1 deuteron by using twist-2 relations, which are similar to the Wandzura-Wilczek relation and the Burkhardt-Cottingham sum rule in the spin-1/2 nucleon, together with tensor-polarized twist-2 PDFs $f_{1LL}(x)$. The PDFs are shown for $f_{LT}(x)$ at $Q^2 =2.5$ GeV$^2$, where the tensor-polarized P…

In this work, we construct the D -wave isoscalar π π / K K ¯ coupled-channel Omnès matrix, formulated to satisfy unitarity, analyticity, and the appropriate asymptotic behavior. We employ a two-channel K -matrix model containing poles associated with the f 2 (1270) and f 2 ′ ( 1525 ) resonances. The resulting unitary scattering matrix, which reproduces the experimental ππ → ππ and π π → K K ¯ dat…

Two photons from the ground state para-positronium annihilation are emitted in a maximally entangled singlet state of orthogonal polarizations. In case of the Compton scattering of both photons the phenomenon of quantum entanglement leads to a measurable increase in the azimuthal correlations of scattered photons, as opposed to a classical description treating the two scattering events as indepen…

First information on the time-like electromagnetic structure of baryons in the second resonance region has been obtained from measurements of dielectron (e+ e-) invariant-mass and angular distributions in the quasi-free reaction $π-$ p $\rightarrow$ n e+ e- at $\sqrt{s_{πp}}$ = 1.49 GeV with the High Acceptance Di-Electron Spectrometer (HADES) at GSI using the pion beam impinging on a CH$_2$ targ…