Nuclear Physics B最新文献_第2页

Kiselev-inspired wormholes

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-25 DOI: 10.1016/j.nuclphysb.2025.116883

Jureeporn Yuennan , Piyachat Panyasiripan , Phongpichit Channuie

{"title":"Kiselev-inspired wormholes","authors":"Jureeporn Yuennan , Piyachat Panyasiripan , Phongpichit Channuie","doi":"10.1016/j.nuclphysb.2025.116883","DOIUrl":"10.1016/j.nuclphysb.2025.116883","url":null,"abstract":"<div><div>In this study, we investigate traversable wormholes inspired by the Kiselev framework, which extends classical black hole solutions by incorporating anisotropic fluids. These exotic fluids play a crucial role in cosmology, particularly in explaining phenomena such as the accelerated expansion of the universe. We generalize the Kiselev framework to static, spherically symmetric traversable wormholes and analyze their properties under two distinct models of the redshift function: a constant redshift function and one that varies inversely with the radial coordinate. We examine the energy conditions—specifically the Null Energy Condition (NEC), Weak Energy Condition (WEC), and Strong Energy Condition (SEC)—for these models, demonstrating that only certain exotic fluids can sustain the wormhole structure. Furthermore, we quantify the amount of exotic matter required to maintain these wormholes using the volume integral quantifier and compare our results with other wormhole models. Additionally, we compute the effective potential for photons in Kiselev-inspired wormholes under both redshift function models and analyze their implications for weak gravitational lensing. Our findings suggest that Kiselev-inspired wormholes could serve as viable candidates for exotic geometries, potentially paving the way for future observational verification.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116883"},"PeriodicalIF":2.5,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ferromagnets from higher SU(N) representations 来自更高 SU(N) 表示的铁磁体

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-24 DOI: 10.1016/j.nuclphysb.2025.116880

Alexios P. Polychronakos , Konstantinos Sfetsos

引用次数: 0

Resolution of the neutron lifetime puzzle and the conceptual design of its experimental confirmation

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-22 DOI: 10.1016/j.nuclphysb.2025.116879

Eugene Oks

{"title":"Resolution of the neutron lifetime puzzle and the conceptual design of its experimental confirmation","authors":"Eugene Oks","doi":"10.1016/j.nuclphysb.2025.116879","DOIUrl":"10.1016/j.nuclphysb.2025.116879","url":null,"abstract":"<div><div>The lifetime of free neutrons was a long-standing puzzle: in the <em>beam</em> experiments it significantly exceeded the corresponding result from the <em>trap</em> experiments. The difference far exceeded the experimental error margins. While the results of the trap experiments were based on counting neutrons, the results of the beam experiments were based on counting protons stemming from the three-body decay of a neutron into a free proton and a free electron (plus antineutrino). It was well-known that there is a relatively small probability for the two-body decay of a free neutron into a hydrogen atom (plus antineutrino). For explaining the above puzzle, the Branching Ratio (BR) for this two-body decay – compared to the usual three-body decay – should have been ∼ 1 %. However, the theoretical BR for such two-body decay was previously known to be smaller by several orders of magnitude: 4 × 10<sup>–6</sup>. In one of our papers of 2024 (hereafter paper I) it was pointed out that after taking into account the second solution of the Dirac equation for hydrogen atoms, the theoretical BR for the two-body decay of free neutrons (into hydrogen atoms and antineutrinos) got enhanced by a factor ∼ 3000 to become ∼ 1 %. Thus, the neutron lifetime puzzle appeared solved <em>completely</em>. In the present paper, the resolution of the neutron lifetime puzzle in this way is just the “stepping stone” leading to the “keystone” (i.e., to the central idea): to the proposed conceptual design of the experiments that will constitute both the first experimental detection of the two-body decay of free neutrons and the experimental confirmation that the two-body decay of free neutrons produces overwhelmingly the hydrogen atoms described by the second solution of the Dirac equation.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116879"},"PeriodicalIF":2.5,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Casimir effect of rough plates under a magnetic field in Hořava-Lifshitz theory

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-21 DOI: 10.1016/j.nuclphysb.2025.116878

Byron Droguett , Claudio Bórquez

引用次数: 0

Novel possible symmetries of S-matrix generated by Z2n-graded Lie superalgebras

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-19 DOI: 10.1016/j.nuclphysb.2025.116877

Ren Ito, Akio Nago

引用次数: 0

Observational constraints on QPOs with orbital motion around charged non-commutative Schwarzschild black hole surrounded by perfect fluid dark matter

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-18 DOI: 10.1016/j.nuclphysb.2025.116873

Asifa Ashraf , Tayyab Naseer , Himanshu Chaudhary , Abdelmalek Bouzenada , Farruh Atamurotov , Batuhan Çil , Ertan Güdekli

{"title":"Observational constraints on QPOs with orbital motion around charged non-commutative Schwarzschild black hole surrounded by perfect fluid dark matter","authors":"Asifa Ashraf , Tayyab Naseer , Himanshu Chaudhary , Abdelmalek Bouzenada , Farruh Atamurotov , Batuhan Çil , Ertan Güdekli","doi":"10.1016/j.nuclphysb.2025.116873","DOIUrl":"10.1016/j.nuclphysb.2025.116873","url":null,"abstract":"<div><div>We study the orbital and oscillatory motion of test particles around a charged, non-commutative black hole surrounded by perfect fluid dark matter. We derive analytical expressions for the radial profiles of specific energy and angular momentum of stable equatorial circular orbits and discuss their stability using the effective potential approach. We also analyze the innermost stable circular orbits, the effective force acting on particles, and the frequencies of radial and latitudinal harmonic oscillations. The paper explores the quasi-periodic oscillations of particles near stable orbits and addresses periastron precession. We find that the model parameters strongly influence the motion of particles around black holes. Using observational data from multiple X-ray binary structures, we apply Monte Carlo Markov Chain (MCMC) analyses to restrain certain parameters such as <em>α</em>, <em>β</em>, and <em>Q</em> corresponding to the considered black hole.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116873"},"PeriodicalIF":2.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shadows and photon spheres in static and rotating traversable wormholes

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-17 DOI: 10.1016/j.nuclphysb.2025.116876

Takol Tangphati , Phongpichit Channuie , Kazuharu Bamba , Davood Momeni

引用次数: 0

Thermodynamic properties of quantum-corrected AdS black hole with phantom global monopoles

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-17 DOI: 10.1016/j.nuclphysb.2025.116861

Bilel Hamil , Bekir Can Lütfüoğlu , Faizuddin Ahmed , Zeeshan Yousaf

{"title":"Thermodynamic properties of quantum-corrected AdS black hole with phantom global monopoles","authors":"Bilel Hamil , Bekir Can Lütfüoğlu , Faizuddin Ahmed , Zeeshan Yousaf","doi":"10.1016/j.nuclphysb.2025.116861","DOIUrl":"10.1016/j.nuclphysb.2025.116861","url":null,"abstract":"<div><div>In this paper, we introduce a metric ansatz designed to describe spherically symmetric quantum-corrected black hole (BH) space-time within an AdS space background, incorporating both an ordinary and a phantom global monopole. Our study focus into the thermodynamic properties of this BH, where we compute key parameters such as the Hawking temperature and specific heat capacity. We then proceed to analyze the effective potential of the system, considering both null and time-like geodesics, and investigate the shadow radius of the BH. Additionally, we calculate the emission rate of particles from the BH, providing insights into the energy dynamics. The geodesic equations of motion are explored to visualize the trajectories of massive particles within the BH. Throughout our investigation, we thoroughly examine how the inclusion of both ordinary and phantom global monopoles, combined with the quantum-corrected parameter, influences various thermal properties, the effective potential of the system, the BH shadow radius, energy emission rate, and the trajectories of massive particles. Importantly, by generating figures that depict these phenomena, we emphasize the differences in results obtained with ordinary global monopoles and phantom ones, considering a range of quantum-corrected parameter values and small energy scale parameters, which allows us to discern the distinct effects of each type of monopole in the black hole's behavior.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116861"},"PeriodicalIF":2.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Particle-antiparticle oscillation modes crossing horizon: Baryogenesis and dark-matter waves

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-17 DOI: 10.1016/j.nuclphysb.2025.116875

She-Sheng Xue (薛社生)

{"title":"Particle-antiparticle oscillation modes crossing horizon: Baryogenesis and dark-matter waves","authors":"She-Sheng Xue (薛社生)","doi":"10.1016/j.nuclphysb.2025.116875","DOIUrl":"10.1016/j.nuclphysb.2025.116875","url":null,"abstract":"<div><div>Quantum massive particle and antiparticle pair production and oscillation during reheating result in a holographic and massive pair plasma state. Perturbations in the densities of particles and antiparticles within this plasma form acoustic waves, characterized by symmetric and asymmetric density contrasts. By deriving the acoustic wave equations and identifying the frequencies of the lowest-lying perturbation modes (with zero wave number), the study shows that the wavelengths of these modes, when compared with the horizon size, suggest the possibility of superhorizon crossing during reheating. This crossing leads to particle-antiparticle asymmetry observable by an observer inside the horizon. The decay of massive particles and antiparticles into baryons generates a net baryon number, potentially explaining baryogenesis. The calculated baryon number-to-entropy ratio aligns with observational data. This crossing also accounts for dark matter particle-antiparticle asymmetry in the present Universe. The study also explores perturbation modes with nonzero wave numbers, representing dark-matter acoustic waves. These modes exited the horizon and re-entered after recombination, potentially imprinting on the matter power spectrum at large length scales and influencing the formation of large-scale structures and galaxies.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116875"},"PeriodicalIF":2.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

WGC as WCCC protector: The synergistic effects of various parameters in non-commutative black holes for identifying WGC candidate models

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-03-14 DOI: 10.1016/j.nuclphysb.2025.116872

Mohammad Ali S. Afshar , Jafar Sadeghi

{"title":"WGC as WCCC protector: The synergistic effects of various parameters in non-commutative black holes for identifying WGC candidate models","authors":"Mohammad Ali S. Afshar , Jafar Sadeghi","doi":"10.1016/j.nuclphysb.2025.116872","DOIUrl":"10.1016/j.nuclphysb.2025.116872","url":null,"abstract":"<div><div>The integration of non-commutative geometry and Gauss-Bonnet corrections in an action and the study of their black hole responses can provide highly intriguing insights. Our primary motivation for this study is to understand the interplay of these two parameters on the geodesics of spacetime, including photon spheres and time-like orbits. In this study, we found that this integration, in its initial form, can limit the value of the Gauss-Bonnet parameter (<em>α</em>), creating a critical threshold beyond which changes in the non-commutative parameter (Ξ) become ineffective, and the structure can only manifest as a naked singularity. Furthermore, we found that using a more complex model, which includes additional factors such as a cloud of strings and linear charge, as a sample for studying spacetime geodesics, yield different and varied results. In this scenario, negative <em>α</em> values can also play a role, notably preserving the black hole form even with a super-extremal charge (<span><math><mi>q</mi><mo>></mo><mi>m</mi></math></span>). For <span><math><mi>α</mi><mo>></mo><mn>0.1</mn></math></span>, the black hole mass parameter becomes significantly influential, with a critical mass below which the impact of other parameter changes is nullified. Interestingly, considering a more massive black hole, this high-mass state also maintains its black hole form within the super-extremal charge range. The existence of these two models led us to our main goal. By examining the temperature for these two cases, we find that both situations are suitable for studying the Weak Gravity Conjecture (WGC). Finally, based on the behavior of these two models, we will explain how the WGC acts as a logical solution and a protector for the WCCC.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116872"},"PeriodicalIF":2.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0