Energy Density Functionals are of major interest for the study of the atomic nucleus as, coupled with mean-field and beyond N-body approaches, they are applicable to the whole nuclear chart, including superheavy elements. On the one hand, the growing need for nuclear data and, on the other hand, the large amount of experimental data on exotic nuclei explain the work carried out on these phenomenological forms of the nucleon-nucleon interaction to analyze the richness of the nuclear phenomena. In this paper, we propose a fully finite-range extension of the Gogny EDF, including a short-range spin-orbit term and a long-range tensor term. The original fitting protocol of the Gogny interaction has been adapted to include both finite range spin-orbit and tensor terms, adding new constraints and filters linked to relevant data. Nuclear matter, spectroscopic and fission properties are discussed, highlighting ways of improving EDFs when all spin and isospin exchanges are introduced with finite-range terms.

France

G. Zietek

N. Pillet

Spain

M. Anguiano

P. Carpentier

N. Dubray

R.N. Bernard

G. Blanchon

D. Regnier

Impact of finite-range spin-orbit and tensor terms in Gogny EDF on structure and fission properties

Cross sections for neutron and proton transfer channels were measured in the proton-rich system 92Mo+ 54Fe using the PRISMA magnetic spectrometer. The energy dependence of the absolute transfer cross sections was investigated over a beam energy range spanning from slightly above to below the Coulomb barrier. A significant enhancement was observed in the 2 <italic>p</italic> and <math altimg='si1.svg'><mrow><mn>2</mn><mi>p</mi><mo linebreak='goodbreak'>+</mo><mn>2</mn><mi>n</mi></mrow></math> pickup and stripping channels compared to expectations based on independent single-nucleon transfer, suggesting strong correlations in the multinucleon transfer mechanism.

Croatia

T. Mijatović

S. Szilner

Italy

L. Corradi

F. Galtarossa

G. Pollarolo

Poland

G. Colucci

E. Fioretto

A. Goasduff

A. Gottardo

D. Jelavić Malenica

M. Milin

G. Montagnoli

D. Montanari

N. Soić

A.M. Stefanini

J.J. Valiente Dobón

Revealing nucleon-nucleon correlation effects through sub-Coulomb transfer reactions in 92Mo+ 54Fe

An attempt is made to explain the experimentally observed binary decay of some fission fragments of 252Cf(sf) while traversing the degrader foil. Assuming these fragments are born in metastable shape-isomer/cluster states formed during the initial binary fission, an influence of the Coulomb field of the foil nuclei on decay barriers and half-lives of these states is investigated.

Russia

F.O. Otakhonov

Sh. A. Kalandarov

G.G. Adamian

N.V. Antonenko

Yu. V. Pyatkov

D.V. Kamanin

Influence of the Coulomb field of foil nuclei on half-lives of cluster states in fission fragments

The Barnett effect is a fundamental magnetomechanical phenomenon in which a rotating material becomes magnetized due to the coupling of spin with rotation. Using a hadron resonance gas (HRG) model under rigid rotation, we compute the Barnett magnetization ( <italic>M</italic> <inf>Barnett</inf>) and show that it produces a magnetic field ( <italic>B</italic> <inf>ind</inf>) comparable in magnitude to the well-known external field ( <italic>B</italic> <inf>ext</inf>) from spectator protons at low energy heavy-ion collisions. This finding establishes the Barnett effect as a previously overlooked but essential source of magnetization and magnetic field in the heavy-ion collisions, with profound implications for understanding spin dynamics and anomalous transport in quantum chromodynamics under extreme rotation.

Mexico

Dushmanta Sahu

Barnett effect as a new source of magnetic field in heavy-ion collisions

The behavior of vector mesons in extreme environments provides a unique probe of non-perturbative Quantum Chromodynamics. We investigate the conditions for Bose-Einstein condensation (BEC) of spin-1 <italic>&#961;</italic> mesons in dense rotating hadronic matter, a regime relevant to the peripheral heavy-ion collisions and the interiors of rapidly rotating neutron stars. When the <italic>&#961;</italic> meson chemical potential ( <italic>&#956;<inf>&#961;</inf></italic>) approaches its effective mass ( <math altimg='si1.svg'><msubsup><mi>m</mi><mi>&#961;</mi><mo>*</mo></msubsup></math>), a phase transition to BEC occurs. We demonstrate that this transition is non-trivially influenced by global rotation, which couples to the spin of the <italic>&#961;</italic> mesons, leading to a macroscopic spin alignment of the condensate along the axis of rotation. This interplay between condensation and rotation results in distinct polarization patterns, which can serve as a possible signature of a BEC in experiments. The results suggest that rapidly rotating neutron stars may harbor an anisotropic, spin-polarized <italic>&#961;</italic>-condensed phase, which could impact their equation of state.

India

Kshitish Kumar Pradhan

Raghunath Sahoo

Emergent spin polarization from <italic>&#961;</italic> meson condensation in rotating hadronic matter

In this paper, we examine the scaling laws in gravitational system from the perspective of free energy landscape and the scaling hypothesis. It has been found that for some special black holes, their critical exponents (0,1,2,3) are beyond mean field theory, and more surprisingly violate the scaling laws. We find that the main reason for the violation of the scaling laws is that the heat capacity at constant volume <italic>C<inf>V</inf></italic> is 0, so the critical exponent <italic>&#945;</italic> is often treated as 0, which can not be derived from the scaling hypothesis while another three critical exponents can. We also find that there is a symmetry violation for the two coexistence states <italic>&#969;<inf>l</inf></italic> and <italic>&#969;<inf>s</inf></italic>.

China

Shi-Bei Kong

Heat capacity and the violation of scaling laws in gravitational system

We investigate photon production from media characterized by a time-dependent chiral chemical potential <italic>&#956;</italic> <inf>5</inf>( <italic>t</italic>). We first consider the chiral anomaly as a small perturbation and show that <italic>&#956;</italic> <inf>5</inf>&#8239;&#8594;&#8239;2 <italic>&#947;</italic> process generates non-polarized radiation, as the probabilities of producing right and left-handed photons are equal. In chiral semimetal with a vanishing chiral chemical potential but a finite separation of Weyl nodes, <bold>&#916;</bold>( <italic>t</italic>), the photon production vanishes at the leading order of perturbation theory. We then employ the method of Bogolyubov transformation to obtain the photon spectrum that sums up all powers of <italic>&#956;</italic> <inf>5</inf>. Employing the exactly solvable model <math altimg='si16.svg'><mrow><msub><mi>&#956;</mi><mn>5</mn></msub><mrow><mo>(</mo><mi>t</mi><mo>)</mo></mrow><mo>&#8733;</mo><mi>A</mi><mo linebreak='goodbreak'>+</mo><mi>B</mi><mi>tanh</mi><mrow><mo>(</mo><mi>t</mi><mo linebreak='badbreak'>/</mo><mi>&#964;</mi><mo>)</mo></mrow></mrow></math>, we demonstrate that the spectrum exhibits strong circular polarization, whose direction is determined by the sign of <italic>&#956;</italic> <inf>5</inf>. The spectrum contains resonances associated with the instability of the electromagnetic field in chiral media. We discuss potential phenomenological applications of these findings.

United States

Kirill Tuchin

Polarized electromagnetic radiation by chiral media with time-dependent chiral chemical potential

In this letter, we present a geometric representation of the CP phases <italic>&#948;</italic> <inf>PDG</inf> and <italic>&#948;</italic> <inf>KM</inf> in the PDG and Kobayashi&#8211;Maskawa parameterizations of the flavor mixing matrix in the complex plane. The sum rule with the unitarity triangle <math altimg='si1.svg'><mrow><msub><mi>&#948;</mi><mrow><mrow><mi mathvariant='normal'>P</mi></mrow><mi>D</mi><mi>G</mi></mrow></msub><mo linebreak='goodbreak'>+</mo><msub><mi>&#948;</mi><mrow><mrow><mi mathvariant='normal'>K</mi></mrow><mi>M</mi></mrow></msub><mo linebreak='goodbreak'>=</mo><mi>&#960;</mi><mo linebreak='goodbreak'>&#8722;</mo><mi>&#945;</mi><mo linebreak='goodbreak'>+</mo><mi>&#947;</mi></mrow></math> is expressed as a quadrangle, which is a combination of a unitarity triangle and an alternative triangle. Through the unitarity quadrangle, the CP phases are also identified with specific geometric angles. Furthermore, a new set of inverse unitarity triangles is defined from the inversion formula of a unitary matrix <math altimg='si2.svg'><mrow><msup><mi>U</mi><mo>&#8224;</mo></msup><mo linebreak='goodbreak'>=</mo><msup><mi>U</mi><mrow><mo>&#8722;</mo><mn>1</mn></mrow></msup></mrow></math>. These novel triangles contain standard angles of the form <math altimg='si3.svg'><mrow><mi>arg</mi><mo>[</mo><msub><mi>U</mi><mrow><mi>&#945;</mi><mi>i</mi></mrow></msub><msub><mi>U</mi><mrow><mi>&#946;</mi><mi>j</mi></mrow></msub><msubsup><mi>U</mi><mrow><mi>&#945;</mi><mi>j</mi></mrow><mo>*</mo></msubsup><msubsup><mi>U</mi><mrow><mi>&#946;</mi><mi>i</mi></mrow><mo>*</mo></msubsup><mo>]</mo></mrow></math> and new angles <math altimg='si4.svg'><mrow><mi>arg</mi><mo>[</mo><msub><mi>U</mi><mrow><mi>&#945;</mi><mi>i</mi></mrow></msub><msub><mi>U</mi><mrow><mi>&#946;</mi><mi>j</mi></mrow></msub><msub><mi>U</mi><mrow><mi>&#947;</mi><mi>k</mi></mrow></msub><mo linebreak='goodbreak'>/</mo><mi>det</mi><mi>U</mi><mo>]</mo></mrow></math>, which directly determine nontrivial arguments of the mixing matrix elements.

Japan

Masaki J.S. Yang

Geometric representation of CP phases <italic>&#948;</italic> <inf>PDG</inf>, <italic>&#948;</italic> <inf>KM</inf> in flavor mixing matrix and its sum rule by alternative unitarity triangle and quadrangle

We analyze quasinormal modes, grey-body factors, and absorption cross-sections of a massive scalar field in the background of a Schwarzschild black hole surrounded by a Hernquist dark-matter halo. The quasinormal spectrum is obtained through the higher-order WKB method and verified by time-domain evolution, showing consistent results. The field mass increases the oscillation frequency and reduces the damping rate, producing longer-lived modes, while variations in the halo parameters lead to moderate shifts in the spectrum. The grey-body factors reveal a suppression of low-frequency transmission and a displacement of their main features toward higher frequencies, resulting in a corresponding shift in the absorption cross-section.

Czechia

B.C. Lütfüoğlu

Long-lived quasinormal modes, grey-body factors and absorption cross-section of the black hole immersed in the Hernquist galactic halo

We present a model constructed within a non-supersymmetric framework capable of explaining both current neutrino oscillation data and the observed dark matter relic abundance. In this study, the Yukawa couplings are expressed as polyharmonic Maaß forms, and the non-supersymmetric left-right symmetric model is realized through the Γ <inf>3</inf> modular group, with neutrino masses generated via the Type II seesaw dominance mechanism. The analysis focuses on determining the neutrino oscillation parameters, the effective Majorana mass arising from the standard contribution, and the dark matter relic density. Our results indicate that the model strongly favours the normal mass hierarchy over the inverted one. Furthermore, the effective Majorana mass is predicted to lie in the range <math altimg='si13.svg'><mrow><msup><mn>10</mn><mrow><mo>&#8722;</mo><mn>3</mn></mrow></msup><mspace width='0.16em' /><mtext>eV</mtext></mrow></math> to 0.1&#8201;eV. In addition, the lightest sterile neutrino present in the model is considered a viable dark matter candidate. A sterile neutrino mass in the range 10&#8201;keV to 30&#8201;keV is found to yield consistent results for both the relic density and active-sterile mixing angles.

Bhabana Kumar

Mrinal Kumar Das

Neutrino phenomenology and dark matter in a left-right asymmetric model with non-holomorphic modular <italic>A</italic> <inf>4</inf> group