Nuclear Physics B最新文献_第2页

Einstein–Gauss–Bonnet–Myrzakulov gravity from R + F(T,G): Numerical insights and torsion–Gauss–Bonnet dynamics in Weitzenböck spacetime R + 的Einstein-Gauss-Bonnet-Myrzakulov引力F(T，G): Weitzenböck时空中扭转- gauss - bonnet动力学的数值见解

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-22 DOI: 10.1016/j.nuclphysb.2025.116966

Davood Momeni , Ratbay Myrzakulov

{"title":"Einstein–Gauss–Bonnet–Myrzakulov gravity from R + F(T,G): Numerical insights and torsion–Gauss–Bonnet dynamics in Weitzenböck spacetime","authors":"Davood Momeni , Ratbay Myrzakulov","doi":"10.1016/j.nuclphysb.2025.116966","DOIUrl":"10.1016/j.nuclphysb.2025.116966","url":null,"abstract":"<div><div>The study of modified gravity models has garnered significant attention because of their potential to provide alternative explanations for cosmological phenomena, such as the accelerated expansion of the universe and the nature of dark energy. One such model, the Einstein–Gauss–Bonnet–Myrzakulov <span><math><mi>R</mi><mo>+</mo><mi>F</mi><mo>(</mo><mi>T</mi><mo>,</mo><mi>G</mi><mo>)</mo></math></span> gravity (EGBMG), which incorporates the curvature <em>R</em>, torsion <em>T</em>, and the Gauss-Bonnet term <em>G</em>, offers a promising framework to explore the dynamics of the universe and its evolution. This paper delves into the theoretical and observational implications of the EGBMG model, focusing on its ability to address long-standing challenges in cosmology, including the evolution of dark energy and the transition from early-time inflationary behavior to late-time acceleration. We review recent advancements in the model, including its compatibility with observational data and its ability to provide new insights into cosmic acceleration. Through a combination of theoretical models, dynamical systems analysis, and cosmological diagnostics, we demonstrate the robustness of the EGBMG framework in explaining the large-scale structure of the universe and its accelerated expansion. This paper serves as a step toward further exploring the potential of this model to understand the fundamental forces driving the cosmos and its consistency with modern observational constraints in Weitzenböck spacetime.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116966"},"PeriodicalIF":2.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Periodic Motzkin chain: Ground states and symmetries 周期莫兹金链：基态和对称性

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-21 DOI: 10.1016/j.nuclphysb.2025.116963

Andrei G. Pronko

引用次数: 0

Gravastar admitting conformal motion in Rastall gravity 在拉斯特重力中承认共形运动

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-21 DOI: 10.1016/j.nuclphysb.2025.116960

M. Sharif , Tayyab Naseer , Areej Tabassum

{"title":"Gravastar admitting conformal motion in Rastall gravity","authors":"M. Sharif , Tayyab Naseer , Areej Tabassum","doi":"10.1016/j.nuclphysb.2025.116960","DOIUrl":"10.1016/j.nuclphysb.2025.116960","url":null,"abstract":"<div><div>This paper investigates a unique stellar object, known as a gravastar that admits the conformal motion within the framework of non-conserved Rastall theory. By incorporating conformal Killing vectors, we analyze how the relationship between matter and geometry influences the gravastar structure and stability under modified field equations. Utilizing these Killing vectors along with an equation of state <span><math><mi>p</mi><mo>=</mo><mi>ω</mi><mi>ρ</mi></math></span>, where <span><math><mn>0</mn><mo><</mo><mi>ω</mi><mo><</mo><mn>1</mn></math></span> characterizes the normal matter distribution, we analytically examine various physical properties of the gravastar, including proper length, energy, entropy, equation of state parameter, matching conditions, and stability criteria such as surface redshift and adiabatic index. The graphical analysis for these factors is also presented to further enrich the developed results. We further explore the influence of Rastall parameter on the gravastar's stability and structural configuration. Our findings indicate that Rastall theory, when combined with the conformal symmetry, yields a physically viable gravastar model that may present distinctive features from black holes under specific astrophysical conditions.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116960"},"PeriodicalIF":2.5,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The cosmological significance of boundary term in non-metricity gravity 非度规引力中边界项的宇宙学意义

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-20 DOI: 10.1016/j.nuclphysb.2025.116965

Hamid Shabani , Avik De , Tee-How Loo

{"title":"The cosmological significance of boundary term in non-metricity gravity","authors":"Hamid Shabani , Avik De , Tee-How Loo","doi":"10.1016/j.nuclphysb.2025.116965","DOIUrl":"10.1016/j.nuclphysb.2025.116965","url":null,"abstract":"<div><div>Within the context of metric-affine gravity, we examine the significance of the boundary term in symmetric teleparallel gravity by employing the cosmological dynamical system analysis method. We focus on the novel gravity models characterized by the functions <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>C</mi><mo>)</mo></math></span>, where <em>f</em> is a smooth function of the non-metricity scalar <em>Q</em> and the associated boundary term <em>C</em>. In a cosmological setting adopting three different classes of symmetric teleparallel affine connections, we investigate a model <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>C</mi><mo>)</mo><mo>=</mo><msup><mrow><mi>Q</mi></mrow><mrow><mi>s</mi></mrow></msup><mo>+</mo><mi>e</mi><msup><mrow><mi>C</mi></mrow><mrow><mi>r</mi></mrow></msup></math></span>, and some special cases of this model. We show that the boundary term which is added to the Einsteinian field equations (or equivalently to <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>)</mo><mo>=</mo><mi>Q</mi></math></span> ones) is capable of bringing forward solutions corresponding to the early accelerated expansion. This alludes the physics behind the boundary terms which usually are discarded in the most gravitational theories.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116965"},"PeriodicalIF":2.5,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sphaleron and gravitational wave with the Higgs-Dilaton potential in the standard model two-time physics 双时间物理标准模型中具有希格斯-膨胀子势的闪子和引力波

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-19 DOI: 10.1016/j.nuclphysb.2025.116964

Vo Quoc Phong , Quach Ai Mi , Nguyen Xuan Vinh

引用次数: 0

Can we determine the exact size of the nucleon?: A comprehensive study of different radii 我们能确定核子的确切大小吗？：对不同半径的综合研究

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-19 DOI: 10.1016/j.nuclphysb.2025.116962

{"title":"Can we determine the exact size of the nucleon?: A comprehensive study of different radii","authors":"","doi":"10.1016/j.nuclphysb.2025.116962","DOIUrl":"10.1016/j.nuclphysb.2025.116962","url":null,"abstract":"<div><div>The concept of nucleon radii plays a central role in our understanding of the internal structure of protons and neutrons, providing critical insights into the non-perturbative regime of quantum chromodynamics (QCD). While the charge radius is often interpreted as the “size” of the nucleon, this interpretation is an oversimplification that overlooks the multifaceted nature of nucleon structure. This paper provides a comprehensive overview of the different nucleon radii, including the charge and magnetic radii, the axial radius, and the emerging concepts of mechanical and mass radii. We discuss the definitions as well as the experimental, theoretical and phenomenological determinations of these radii, highlighting their distinct physical origins and implications. By synthesizing recent experimental results and theoretical advancements, we emphasize that each radius reflects a specific aspect of the nucleon's internal structure, such as its electric charge distribution, magnetic properties, weak interactions, or internal mechanical stress. In particular, we address the common but misleading interpretation of the proton radius as a simple measure of its size, underscoring the nuanced and context-dependent nature of nucleon radii. Through this exploration, we aim to clarify the roles of these radii in characterizing nucleon structure and to identify open questions that remain to be addressed. This work contributes to a deeper understanding of the nucleon and its significance in the broader context of particle and nuclear physics.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116962"},"PeriodicalIF":2.5,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effective quantum gravity black hole with cloud of strings surrounded by quintessence field 弦云被精粹场包围的有效量子引力黑洞

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-16 DOI: 10.1016/j.nuclphysb.2025.116961

Ahmad Al-Badawi , Faizuddin Ahmed , İzzet Sakallı

{"title":"Effective quantum gravity black hole with cloud of strings surrounded by quintessence field","authors":"Ahmad Al-Badawi , Faizuddin Ahmed , İzzet Sakallı","doi":"10.1016/j.nuclphysb.2025.116961","DOIUrl":"10.1016/j.nuclphysb.2025.116961","url":null,"abstract":"<div><div>In this study, we investigate a static, spherically symmetric black hole (BH) within the framework of Effective Quantum Gravity (EQG) in the presence of a cloud of strings (CS) and a quintessence field (QF). We derive the modified metric function incorporating quantum corrections and analyze its impact on the horizon structure, geodesic motion, shadow formation, scalar perturbations, and thermodynamics. The metric function is influenced by three key parameters: the quantum correction parameter <em>ξ</em>, the CS parameter <em>α</em>, and the parameters (<span><math><mi>c</mi><mo>,</mo><mi>w</mi></math></span>) of the QF. Our results reveal that increasing <em>ξ</em> primarily influences the Cauchy horizon, causing it to expand, while having a negligible effect on the event and cosmological horizons. On the other hand, larger values of <em>α</em> and <em>c</em> lead to an increase in the event horizon radius while reducing the cosmological horizon. The study of null and time-like geodesics indicates that quantum effects modify photon trajectories and the stability of circular orbits. We derive analytical expressions for the radius of the photon sphere and the BH shadow. Our findings indicate that the presence of QF and CS enlarges the shadow radius, whereas the incorporation of effective quantum corrections (<em>ξ</em>) reduces it. Using the Regge-Wheeler equation, we analyze scalar perturbations and greybody factors, demonstrating that <em>ξ</em> suppresses transmission probabilities while enhancing reflection coefficients. This study paves the way for further exploration of EQG-modified rotating BHs, gravitational wave emissions, and astrophysical tests of quantum corrections in future observational studies.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116961"},"PeriodicalIF":2.5,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the proof of chiral symmetry breaking through anomaly matching in QCD-like theories: An exemplification 用类量子cd理论中的异常匹配证明手性对称性突破：一个例子

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-15 DOI: 10.1016/j.nuclphysb.2025.116957

Luca Ciambriello , Roberto Contino , Ling-Xiao Xu

{"title":"On the proof of chiral symmetry breaking through anomaly matching in QCD-like theories: An exemplification","authors":"Luca Ciambriello , Roberto Contino , Ling-Xiao Xu","doi":"10.1016/j.nuclphysb.2025.116957","DOIUrl":"10.1016/j.nuclphysb.2025.116957","url":null,"abstract":"<div><div>Our recent works <span><span>[1]</span></span>, <span><span>[2]</span></span> revisit the proof of chiral symmetry breaking in the confining regime of four-dimensional QCD-like theories, i.e. <span><math><mi>S</mi><mi>U</mi><mo>(</mo><msub><mrow><mi>N</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>)</mo></math></span> gauge theories with <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>f</mi></mrow></msub></math></span> flavors of vectorlike quarks in the fundamental representation. The analysis relies on the structure of ‘t Hooft anomaly matching and persistent mass conditions for theories with same <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> and different <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>f</mi></mrow></msub></math></span>. In this paper, we work out concrete examples with <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>3</mn></math></span> and <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>5</mn></math></span> to support and elucidate the results of <span><span>[1]</span></span>, <span><span>[2]</span></span>. Within the same examples, we also test some claims made in earlier works.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116957"},"PeriodicalIF":2.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neutrino oscillations in the background of a black hole embedded in an expanding Universe 嵌入膨胀宇宙中的黑洞背景中的中微子振荡

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-14 DOI: 10.1016/j.nuclphysb.2025.116958

Daniele Gregoris

{"title":"Neutrino oscillations in the background of a black hole embedded in an expanding Universe","authors":"Daniele Gregoris","doi":"10.1016/j.nuclphysb.2025.116958","DOIUrl":"10.1016/j.nuclphysb.2025.116958","url":null,"abstract":"<div><div>In this paper, we will study the phenomenon of neutrino oscillations when traveling through the gravitational field of a black hole embedded in a spatially homogeneous and isotropic flat universe. Thus, we will compute the phase shift for neutrinos within the McVittie spacetime building upon the description of their geodesic motion. Standard assumptions of ultrarelativistic neutrinos with degeneracy between their energy eigenstates are maintained, while no screening mechanisms are needed; the correctness of our result can therefore be checked against relevant literature limiting scenarios of static isolated Schwarzschild black hole and of the Friedmann universe backgrounds, separately. We will compare and contrast the effects of local galactic and global cosmic physics, accounted for by the black hole mass and the Hubble rate, in the phase shift; its numerical value will be estimated for some realistic scenarios by re-casting it in terms of measurable astrophysical and cosmological parameters. We will identify the range of applicability of our model as for neutrinos sourced in the accelerated expansion phase of the universe, with the roles of the cosmological constant, dark matter and black hole mass scrutinized in the loss of coherence of the wavepackets. Our analysis will allow us to identify similarities and differences in the interaction between neutrinos and <em>matter</em> or <em>gravitational</em> fields.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116958"},"PeriodicalIF":2.5,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Introduction of the G2-Ricci flow: Geometric implications for spontaneous symmetry breaking and gauge boson masses G2-Ricci流的介绍：自发对称破缺和规范玻色子质量的几何含义

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-05-14 DOI: 10.1016/j.nuclphysb.2025.116959

Richard Pinčák , Alexander Pigazzini , Michal Pudlák , Erik Bartoš

引用次数: 0