C. R. Muniz, R. M. P. Neves, M. B. Cruz, M. S. Cunha
{"title":"Comment on “Imprints of Casimir wormhole in Einstein Gauss–Bonnet gravity with non-vanishing complexity factor”","authors":"C. R. Muniz, R. M. P. Neves, M. B. Cruz, M. S. Cunha","doi":"10.1140/epjc/s10052-025-14209-7","DOIUrl":"10.1140/epjc/s10052-025-14209-7","url":null,"abstract":"<div><p>In this Comment, we address a significant flaw in the analysis by Zubair and Farooq regarding Casimir wormhole solutions within Einstein–Gauss–Bonnet (EGB) gravity. Their reliance on four-dimensional Casimir energy and pressure sources contradicts the framework that requires <span>(Dge 5)</span>.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14209-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904775","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":"Constraints on bulk fields: no-go conjectures for braneworld models","authors":"G. Alencar, R. N. Costa Filho, M. Gogberashvili","doi":"10.1140/epjc/s10052-025-14195-w","DOIUrl":"10.1140/epjc/s10052-025-14195-w","url":null,"abstract":"<div><p>This work establishes a series of no-go conjectures that impose rigorous constraints on the zero mode localization of bulk fields in braneworld scenarios, specifically affecting gauge and spinor fields within five-dimensional spacetimes. Our approach differs from traditional methods as it does not rely on specific equations of motion, making our results broadly applicable across various braneworld models. These no-go conditions reveal fundamental limitations in field localization, challenging the feasibility of embedding fields on the brane. For instance, our analysis demonstrates that existing models fail to achieve consistent localization for gauge and spinor fields. Additionally, one of our conditions indicates that the effective Lagrangian on the brane cannot exhibit conformal invariance.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14195-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908806","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":"Search for dark matter from the center of the Earth with 10 years of IceCube data","authors":"IceCube data collaboration","doi":"10.1140/epjc/s10052-025-14144-7","DOIUrl":"10.1140/epjc/s10052-025-14144-7","url":null,"abstract":"<div><p>The nature of dark matter remains unresolved in fundamental physics. Weakly Interacting Massive Particles (WIMPs), which could explain the nature of dark matter, can be captured by celestial bodies like the Sun or Earth, leading to enhanced self-annihilation into Standard Model particles including neutrinos detectable by neutrino telescopes such as the IceCube Neutrino Observatory. This article presents a search for muon neutrinos from the center of the Earth performed with 10 years of IceCube data using a track-like event selection. We considered a number of WIMP annihilation channels (<span>(chi chi rightarrow tau ^+tau ^-)</span>/<span>(W^+W^-)</span>/<span>(bbar{b})</span>) and masses ranging from 10 GeV to 10 TeV. No significant excess over background due to a dark matter signal was found while the most significant result corresponds to the annihilation channel <span>(chi chi rightarrow bbar{b})</span> for the mass <span>(m_{chi }=250)</span> GeV with a post-trial significance of <span>(1.06sigma )</span>. Our results are competitive with previous such searches and direct detection experiments. Our upper limits on the spin-independent WIMP scattering are world-leading among neutrino telescopes for WIMP masses <span>(m_{chi }>100)</span> GeV.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14144-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908807","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":"Late time phenomena in (f(T,{mathcal {T}})) gravity framework: role of (H_0) priors","authors":"L. K. Duchaniya, B. Mishra","doi":"10.1140/epjc/s10052-025-14187-w","DOIUrl":"10.1140/epjc/s10052-025-14187-w","url":null,"abstract":"<div><p>This study explored the behavior of the <span>(f(T, {mathcal {T}}))</span> cosmological model with the use of various data set combinations. We also compared the results for this model between the Pantheon+ (without SH0ES) and the Pantheon+ &SH0ES (with SH0ES) data sets. Additionally, we incorporated data from BAO along with <span>(H_0)</span> priors. We observed that integrating SH0ES data points leads to a higher estimation of <span>(H_0)</span> than Pantheon+ (without SH0ES). We perform an extensive MCMC analysis for each combination of data sets, providing constraints on the model parameters. We also computed the <span>(chi ^2_{min})</span> value for each combination of data sets to evaluate the chosen model against the standard <span>(Lambda )</span>CDM model. Our primary finding is that the various dataset combinations in the <span>(f(T, {mathcal {T}}))</span> model we examined relate to a range of Hubble constants, which could contribute to reducing the cosmic tension associated with this parameter. Additionally, we investigate the evolution of matter fluctuations by solving the density contrast evolution equation numerically. We calculate numerical solutions for the weighted growth rate <span>(fsigma _8)</span> using these findings. We plotted the cosmological background parameters to check the behavior of the <span>(f(T, {mathcal {T}}))</span> model in late-time. Based on the behavior of these background cosmological parameters, we conclude that our selected models reflect the late-time cosmic dynamics of the Universe.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14187-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908808","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":"Observing black hole phase transitions in extended phase space and holographic thermodynamics approaches from optical features","authors":"Chatchai Promsiri, Weerawit Horinouchi, Ekapong Hirunsirisawat","doi":"10.1140/epjc/s10052-025-14221-x","DOIUrl":"10.1140/epjc/s10052-025-14221-x","url":null,"abstract":"<div><p>The phase transitions of charged Anti-de Sitter (AdS) black holes are characterized by studying null geodesics in the vicinity of the critical curve of photon trajectories around black holes as well as their optical appearance as the black hole images. In the present work, the critical parameters including the orbital half-period <span>(tau ,)</span> the angular Lyapunov exponent <span>(lambda _L,)</span> and the temporal Lyapunov exponent <span>(gamma _L)</span> are employed to characterize black hole phase transitions within both the extended phase space and holographic thermodynamics frameworks. Under certain conditions, we observe multi-valued function behaviors of these parameters as functions of bulk pressure and temperature in the respective approaches. We propose that <span>(tau ,)</span> <span>(lambda _L,)</span> and <span>(gamma _L)</span> can serve as order parameters due to their discontinuous changes at first-order phase transitions. To validate this, we provide detailed analytical calculations demonstrating that these optical critical parameters follow scaling behavior near the critical phase transition point. Notably, the critical exponents for these parameters are found to be 1/2, consistent with those of the van der Waals fluid. Our findings suggest that static and distant observers can study black hole thermodynamics by analyzing the images of regions around the black holes.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14221-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902747","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":"Long-lived quasinormal modes and gray-body factors of black holes and wormholes in dark matter inspired Weyl gravity","authors":"B. C. Lütfüoğlu","doi":"10.1140/epjc/s10052-025-14210-0","DOIUrl":"10.1140/epjc/s10052-025-14210-0","url":null,"abstract":"<div><p>We calculate quasinormal modes and gray-body factors of a massive scalar field in the background of three compact objects in the Weyl gravity: Schwarzschild-like back holes, known as Mannheim–Kazanas solution, non-Schwrazschild-like black holes and traversable wormholes found recently in (Jizba and Mudruňka in Phys Rev D 110(12):124006, 2024, https://doi.org/10.1103/PhysRevD.110.124006, arXiv:2409.08344 [gr-qc]). We show that the spectrum of the massive field is qualitatively different from massless o ne both in the frequency and time domains. While the mass term leads to much longer lifetime of the modes, the arbitrarily long-lived modes, known as quasi-resonances, are not achieved.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14210-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902745","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":"Bispectrum at NLO in single field inflation: conservation and squeezed limit","authors":"Ignatios Antoniadis, Jules Cunat, Auttakit Chatrabhuti, Hiroshi Isono","doi":"10.1140/epjc/s10052-025-14202-0","DOIUrl":"10.1140/epjc/s10052-025-14202-0","url":null,"abstract":"<div><p>In a recent paper, we computed the bispectrum of primordial density perturbations in CMB to second order in the slow-roll parameters of single field inflation, and found logarithmic infrared contributions that diverge in both large physical distances and squeezed limit where one momentum vanishes. In this work, we provide an independent test of the result by checking its conservation and the validity of the consistency relation between the squeezed limit of the bispectrum and the square of the power spectrum. Despite the violation of the main assumption for its general proofs which is the finiteness of the relevant observables in these limits, we find that the identity continues to hold in the vicinity of the squeezed limit and large time.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14202-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902746","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":"Constraining Yukawa-type interaction and coupling constant of axionlike particles to nucleons from recent measurement of the Casimir–Polder interaction","authors":"G. L. Klimchitskaya, V. M. Mostepanenko","doi":"10.1140/epjc/s10052-025-14218-6","DOIUrl":"10.1140/epjc/s10052-025-14218-6","url":null,"abstract":"<div><p>We derive constraints on the parameters of the Yukawa-type interaction and on the coupling constant of axionlike particles to nucleons from the results of recent diffraction experiment on measuring the Casimir–Polder interaction between Ar atoms and a silicon nitride nanograting. It is shown that within the interaction range from 1 to 14.85 nm the obtained constraints are by up to a factor of <span>(3.34times 10^4)</span> stronger than all the other ones found previously from measurements of the Casimir force. The derived constraints are comparable in strength with those deduced from the experiments on neutron scattering. The constraints on the coupling constants of axionlike particles to nucleons following from the diffraction experiment are up to a factor of 24.2 stronger withing the range of axion masses from 32.4 to 100 eV than the previously derived ones from experiments on measuring the Casimir force. They are weaker only in comparison to the constraints found from the experiment using the beams of molecular hydrogen. The potential of the Casimir effect for obtaining stronger constraints on the parameters of hypothetical interactions is discussed.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14218-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900682","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":"Regge trajectories for the triply heavy triquarks","authors":"He Song, Jia-Qi Xie, Jiao-Kai Chen","doi":"10.1140/epjc/s10052-025-14217-7","DOIUrl":"10.1140/epjc/s10052-025-14217-7","url":null,"abstract":"<div><p>We attempt to apply the Regge trajectory approach to the triply heavy triquarks <span>(((QQ')bar{Q}^{prime prime }))</span> <span>((Q,,Q', Q^{prime prime }=b,,c).)</span> We present the triquark Regge trajectory relations, and then employ them to crudely estimate the spectra of the triquarks <span>(((cc)bar{c}),)</span> <span>(((cc)bar{b}),)</span> <span>(((bc)bar{c}),)</span> <span>(((bc)bar{b}),)</span> <span>(((bb)bar{c}),)</span> and <span>(((bb)bar{b}).)</span> The <span>(lambda )</span>-trajectories and the <span>(rho )</span>-trajectories are discussed. The triquark Regge trajectory becomes a new and very simple approach for estimating the spectra of triquarks. Moreover, the spin-averaged masses of the ground states of pentaquarks <span>((bar{c}(cc))(cc),)</span> <span>((bar{b}(cc))(cc))</span> and <span>((bar{c}(bb))(cc))</span> are estimated, which are consistent with other theoretical predictions.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14217-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900681","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":"Sine-Gordon kink lattice","authors":"E. da Hora, C. dos Santos, Fabiano C. Simas","doi":"10.1140/epjc/s10052-025-14211-z","DOIUrl":"10.1140/epjc/s10052-025-14211-z","url":null,"abstract":"<div><p>We consider an extended model with two real scalar fields, <span>(phi (x,t))</span> and <span>(chi (x,t))</span>. The first sector is controlled by the sine-Gordon superpotential, while the second field is submitted to the <span>(chi ^4)</span> one. The fields mutually interact via a nontrivial coupling function <span>(f(chi ))</span> that also changes the kinematics of <span>(phi )</span>. We briefly review the implementation of the Bogomol’nyi–Prasad–Sommerfield (BPS) prescription (Prasad and Sommerfield in Phy Rev Lett 35:12 1975, Bogomolny in Sov J Nucl Phys 24:449, 1976). We then solve the resulting BPS equations for two different interactions <i>f</i>. The first one leads to a single kink-kink configuration, while the second one gives rise to a inhomogeneous sine-Gordon kink lattice. We study the linear stability of these new solutions, focusing on their translational modes. We also explore how the strength of the mutual interaction affects the BPS profiles. In particular, we show that a homogeneous lattice with identical kinks is attained in the regime of extremely strong interactions.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14211-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900684","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}