物理最新文献

{"title":"Erratum to: Two-loop renormalization group restrictions on the standard model and the fourth chiral family","authors":"Yu. F. Pirogov, O. V. Zenin","doi":"10.1140/epjc/s10052-025-14108-x","DOIUrl":"10.1140/epjc/s10052-025-14108-x","url":null,"abstract":"","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14108-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"The nonfactorizable QED correction to the (overline{B}_{s}) ({rightarrow }) (D_{s}^{(*)} {ell } bar{nu }_{ell }) decays","authors":"Yueling Yang,&nbsp;Jiazhi Li,&nbsp;Liting Wang,&nbsp;Junfeng Sun","doi":"10.1140/epjc/s10052-025-14131-y","DOIUrl":"10.1140/epjc/s10052-025-14131-y","url":null,"abstract":"<div><p>Considering the nonfactorizable QED corrections, the branching ratios and ratios of branching ratios <span>(R(D_{s}^{({*})}))</span> for the semileptonic <span>(overline{B}_{s})</span> <span>({rightarrow })</span> <span>(D_{s}^{(*)} {ell } bar{nu }_{ell })</span> decays are reevaluated. It is found that (a) the QED contributions can enhance the branching ratios and reduce the ratios <span>(R(D_{s}^{({*})}))</span>. (b) The <i>SU</i>(3) flavor symmetry holds basically well in the ratios <i>R</i>(<i>D</i>)-<span>(R(D^{*}))</span> for the semileptonic charmed <span>(overline{B}_{u,d,s})</span> decays. (c) The current theoretical uncertainties of branching ratios <span>(mathcal{B}(overline{B}_{s} {rightarrow } D_{s}^{*} {ell } bar{nu }_{ell }))</span> from the form factors are very large.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14131-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Effect of sulfur concentration on electronic properties of h-BN monolayer: a computational study","authors":"Qurat ul Ain Asif,&nbsp;Akhtar Hussain,&nbsp;Aamir Shahzad,&nbsp;Muhammad Kashif,&nbsp;Hamayl Asim,&nbsp;Saima Rashid","doi":"10.1140/epjp/s13360-025-06219-x","DOIUrl":"10.1140/epjp/s13360-025-06219-x","url":null,"abstract":"<div><p>The hexagonal boron nitride (h-BN) monolayer, owing to its applications in biological materials, multi-function composites and optoelectronic devices, has drawn a lot of interest recently. Here, the structural and electronic characteristics of monolayered h-BN sheets doped with sulfur (S) are theoretically explored through density functional theory calculations. Our primary focus was on how the dopant site and concentration is responsible for geometry and energy gap variation. The interatomic distances and position of the substitutional S atoms control the position of defect-related intermediate bands and the band gap of doped material. Strikingly, an indirect bandgap of doped system shows semiconducting behavior, which is narrower than the one for pristine sheet. Different structural arrangements (hexagonal and rectangular) of S defects at the BN monolayer provide a general design for defect engineering which is congenial for its applications in deep UV optoelectronic, electronic, and transistor-based devices.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809116","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}

{"title":"Flexible and transparent highly luminescent sensor based on doped zinc tungstate/graphene oxide nanocomposite","authors":"Sadegh Azadmehr,&nbsp;Sanaz Alamdari,&nbsp;Majid Jafar Tafreshi","doi":"10.1140/epjp/s13360-025-06216-0","DOIUrl":"10.1140/epjp/s13360-025-06216-0","url":null,"abstract":"<div><p>In this study, a cost-effective flexible sensor based on manganese-doped zinc tungstate/graphene oxide composite nanoparticles (ZnWO₄/GO: Mn NPs) was fabricated. ZnWO₄/GO: Mn NPs were successfully synthesized via the coprecipitation method; using an ultrasonic-assisted spin-spray coating technique, synthesized NPs were deposited on polyethylene terephthalate (PET) to form a flexible composite film. The synergistic combination of ultrasonic irradiation and spray coating resulted in defect-free, uniform films with enhanced bonding to the PET substrate. The prepared film's optical response and structural features were investigated under ultraviolet, and ion beam-induced luminescence excitations, along with XRD, EDX-Mapping, FESEM, and FTIR measurements. Also, the ionizing radiation sensitivity of the prepared composite film was investigated using ²⁴¹Am source. XRD, FTIR, and EDX-Mapping elemental results showed characteristic peaks of ZnWO₄ and related elements in the samples. FESEM image showed that prepared NPs are approximately 96–264 nm in diameter. The addition of GO to ZnWO₄ increases the particle size, likely due to the interaction between ZnWO₄ nanoparticles and GO sheets. The band gap energy of the prepared ZnWO₄/GO: Mn film was decreased by doping and obtained <span>(sim)</span> 3.28 eV. According to the measurements, the flexible ZnWO₄/GO: Mn film showed prominent blue-green luminescent, centered at 400–500 nm visible regions and high ionizing ray sensitivity which is comparable with commercial ZnS: Ag. The current–voltage (<i>I</i>–<i>V</i>) characteristics were analyzed under both dark and UV-irradiated conditions, revealing that Mn-doped ZnWO₄/GO exhibited the highest UV sensitivity (3.5) compared to ZnWO₄ (1.5) and ZnWO₄/GO (2.5). The photocurrent response of the samples, assessed through cyclic light activation, showed peak currents of 130, 180, and 200 nA for ZnWO₄, ZnWO₄/GO, and ZnWO₄/GO:Mn, respectively. The enhanced UV response of the Mn-doped composite is attributed to bandgap engineering, oxygen adsorption/desorption processes, and reduced dark current, leading to an improved signal-to-noise ratio. These findings highlight the potential of Mn-doped ZnWO₄/GO nanocomposites for UV detection applications. The results indicate that prepared nanocomposite has the potential for practical applications in future optoelectronic fields and display.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801199","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}

{"title":"Publisher Correction: Structural, wettability, optical, and electrical modifications by varying precursor solutions of sprayed Co3O4 thin films for solar cell applications","authors":"Younes Nezzari,&nbsp;Warda Darenfad,&nbsp;Kamel Mirouh,&nbsp;Noubeil Guermat,&nbsp;Nadir Bouarissa","doi":"10.1140/epjb/s10051-025-00901-w","DOIUrl":"10.1140/epjb/s10051-025-00901-w","url":null,"abstract":"","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 4","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Deformation of the Heisenberg–Weyl algebra and the Lie superalgebra (mathfrak {osp}left( {1|2} right)): exact solution for the quantum harmonic oscillator with a position-dependent mass","authors":"E. I. Jafarov,&nbsp;S. M. Nagiyev,&nbsp;J. Van der Jeugt","doi":"10.1140/epjp/s13360-025-06113-6","DOIUrl":"10.1140/epjp/s13360-025-06113-6","url":null,"abstract":"<div><p>We propose a new deformation of the quantum harmonic oscillator Heisenberg–Weyl algebra with a parameter <span>(a&gt;-1)</span>. This parameter is introduced through the replacement of the homogeneous mass <span>(m_0)</span> in the definition of the momentum operator <span>(hat{p}_x)</span> as well as in the creation–annihilation operators <span>({hat{a}}^pm)</span> with a mass varying with position <i>x</i>. The realization of such a deformation is shown through the exact solution of the corresponding Schrödinger equation for the non-relativistic quantum harmonic oscillator within the canonical approach. The obtained analytical expression of the energy spectrum consists of an infinite number of equidistant levels, whereas the wavefunctions of the stationary states of the problem under construction are expressed through the Hermite polynomials. Then, the Heisenberg–Weyl algebra deformation is generalized to the case of the Lie superalgebra <span>(mathfrak {osp}left( {1|2} right))</span>. It is shown that the realization of such a generalized superalgebra can be performed for the parabose quantum harmonic oscillator problem, the mass of which possesses a behavior completely overlapping with the position-dependent mass of the canonically deformed harmonic oscillator problem. This problem is solved exactly for both even and odd stationary states. It is shown that the energy spectrum of the deformed parabose oscillator is still equidistant; however, both even- and odd-state wavefunctions are now expressed through the Laguerre polynomials. Some basic limit relations recovering the canonical harmonic oscillator with constant mass are also discussed briefly.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809115","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}

{"title":"Traversable wormholes sourced by dark matter in loop quantum cosmology","authors":"Marcos V. de S. Silva,&nbsp;G. Alencar,&nbsp;R. N. Costa Filho,&nbsp;R. M. P. Neves,&nbsp;Celio R. Muniz","doi":"10.1140/epjp/s13360-025-06214-2","DOIUrl":"10.1140/epjp/s13360-025-06214-2","url":null,"abstract":"<div><p>In this work, we investigate the existence of wormholes within the framework of loop quantum cosmology, using isotropic dark matter as the source. We analyze three distinct density profiles and solve the modified gravity field equations alongside the stress-energy tensor conservation, applying appropriate boundary conditions to obtain traversable wormhole solutions. Each solution is shown to satisfy the geometric criteria for wormholes, and their regularity is verified by computing the Kretschmann scalar to ensure the absence of singularities under determined conditions. Additionally, we examine the stress-energy tensor to identify scenarios in which energy conditions are violated within this model. The wormhole geometry is further explored through embedding diagrams, and the amount of exotic matter required to sustain these structures is computed using the volume integral quantifier. Finally, we study the shadow produced by our wormhole solution, considering one of the dark matter density profiles, and compare it with observations of the M87 galaxy.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809117","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}

{"title":"Photon self-interaction through gravitons and axions","authors":"Ahmad Hoseinpour,&nbsp;Moslem Zarei,&nbsp;Mehdi Abdi","doi":"10.1140/epjc/s10052-025-14116-x","DOIUrl":"10.1140/epjc/s10052-025-14116-x","url":null,"abstract":"<div><p>In this work, we propose to employ the concept of photon self-interaction for axion detection. In particular, we derive the interaction Hamiltonian for photons via axions in a ring cavity. We show that when the incoming photons are considered in plane-wave basis, the interaction vanishes. However, when the realistic case of photon wavepackets are assumed, a self-interaction whose strength is proportional to the size of the wavepacket and the cavity length exists. Under specific conditions, we find that the axion-mediated interaction dominates the gravitationally induced self-interaction. We discuss the implications of this setup for axion detection, focusing on the range of axion mass, <span>(10^{-10}~text {eV}&lt;m_a&lt;10^{-4}~text {eV})</span> for which the best accuracy of coupling constants is constrained in some cases to <span>(g_{agamma gamma }&gt; 9 times 10^{-12}~ text {GeV}^{-1})</span>.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14116-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Machine learning in parameter estimation of nonlinear systems","authors":"Kaushal Kumar,&nbsp;Ekaterina Kostina","doi":"10.1140/epjb/s10051-025-00904-7","DOIUrl":"10.1140/epjb/s10051-025-00904-7","url":null,"abstract":"<p>Accurate parameter estimation in nonlinear dynamical systems remains a fundamental challenge due to noise, limited data, and model complexity. Traditional methods, such as gradient-based optimization and nonlinear least squares (NLS), often struggle under real-world multiplicative noise, exhibiting sensitivity to outliers and high computational demands. This study introduces a neural network framework integrating the Huber loss function to achieve robust and efficient parameter estimation. Applied to canonical dynamical systems, including damped oscillators, van der Pol oscillators, Lotka–Volterra models, and chaotic Lorenz dynamics, the proposed method demonstrates superior accuracy and resilience to noise. Notably, it maintains sub-<span>(1.2%)</span> relative errors for key parameters in the Lorenz system, significantly outperforming NLS, which diverges with errors exceeding <span>(12%)</span> under identical noise conditions. The use of SiLU activation improves convergence, yielding statistically significant reductions in estimation errors (<span>(p &lt; 0.01)</span>). Furthermore, the framework operates up to <span>(8times )</span> faster than conventional optimization techniques while reducing root-mean-square error by over <span>(99.9%)</span> in high-noise regimes. These results establish a robust, data-driven approach for parameter estimation in complex dynamical systems, bridging machine learning with nonlinear physics and enabling real-time applications in noisy environments.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 4","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-025-00904-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Magnetic properties of a ferrimagnetic core–shell nanoparticle based on Monte Carlo method","authors":"Wei Wang,&nbsp;Zhen-yu Liu,&nbsp;Xing-guo Wang,&nbsp;Sheng Zou,&nbsp;Dan Lv","doi":"10.1007/s00339-025-08470-6","DOIUrl":"10.1007/s00339-025-08470-6","url":null,"abstract":"<div><p>In this research, the mixed-spin (3/2, 1) Ising model with a core–shell nanoparticle structure is constructed, and its magnetic properties are investigated by Monte Carlo method. Initially, the ground-state phase diagram of the system is analyzed. Secondly, the influence of Hamiltonian parameters including exchange coupling, crystal field, and external magnetic field and other physical parameters including temperature, size, and atomic concentration on the magnetic properties of the system is investigated. Under certain conditions, compensation behavior occurs in the system, and the magnetic susceptibility curve appears with double peaks. Lastly, the hysteresis behavior is analyzed, revealing the presence of multiple hysteresis loops.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}