Physics Letters B最新文献

{"title":"Alpha clusterization as a reason for the narrow symmetric mass distribution in spontaneous fission of 258Fm","authors":"H. Paşca ,&nbsp;G.G. Adamian ,&nbsp;N.V. Antonenko","doi":"10.1016/j.physletb.2025.139943","DOIUrl":"10.1016/j.physletb.2025.139943","url":null,"abstract":"<div><div>The influence of <span><math><mi>α</mi></math></span>-clustering of heavy fragment in the scission Cd+Te configuration on the mass and total kinetic energy distributions of the fragments of spontaneous fission of <span><math><msup><mrow></mrow><mn>258</mn></msup></math></span>Fm is studied. The origin of the total kinetic energy distribution modes is revealed.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139943"},"PeriodicalIF":4.5,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Discovery potential of future electron-positron colliders for a 95 GeV scalar","authors":"Pramod Sharma ,&nbsp;Anza-Tshilidzi Mulaudzi ,&nbsp;Karabo Mosala ,&nbsp;Thuso Mathaha ,&nbsp;Mukesh Kumar ,&nbsp;Bruce Mellado ,&nbsp;Andreas Crivellin ,&nbsp;Maxim Titov ,&nbsp;Manqi Ruan ,&nbsp;Yaquan Fang","doi":"10.1016/j.physletb.2025.139953","DOIUrl":"10.1016/j.physletb.2025.139953","url":null,"abstract":"<div><div>The Large Electron Positron collider observed an indication for a new Higgs boson with a mass around 95 GeV-100 GeV in the process <span><math><mrow><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup><mo>→</mo><msup><mi>Z</mi><mo>*</mo></msup><mo>→</mo><mi>Z</mi><mi>S</mi></mrow></math></span> with <span><math><mrow><mi>S</mi><mo>→</mo><mi>b</mi><mover><mi>b</mi><mo>¯</mo></mover></mrow></math></span>. The interest in this excess re-emerged with the di-photon signature at <span><math><mo>≈</mo></math></span> 95 GeV at the Large Hadron Collider. In fact, a combined global significance of <span><math><mrow><mn>3.4</mn><mi>σ</mi></mrow></math></span> is obtained once <span><math><mrow><mi>W</mi><mi>W</mi></mrow></math></span> and <span><math><mrow><mi>τ</mi><mi>τ</mi></mrow></math></span> signals are included in addition. In this article, we perform a feasibility study for discovering such a new scalar <span><math><mi>S</mi></math></span> at future electron-positron colliders using the recoil-mass method applied to <span><math><mrow><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup><mo>→</mo><mi>Z</mi><mi>S</mi></mrow></math></span> with <span><math><mrow><mi>Z</mi><mo>→</mo><msup><mi>μ</mi><mo>+</mo></msup><msup><mi>μ</mi><mo>−</mo></msup></mrow></math></span> and <span><math><mrow><mi>S</mi><mo>→</mo><mi>b</mi><mover><mi>b</mi><mo>¯</mo></mover></mrow></math></span>. For this, we employ a Deep Neural Network to enhance the separation between the Standard Model background and the signal, reducing the required integrated luminosity necessary for discovery by a factor of two to three. As a result, an <span><math><mrow><mi>S</mi><mi>U</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow><mi>L</mi></msub></mrow></math></span> singlet Higgs with a mass of <span><math><mo>≈</mo></math></span> 95 GeV can be observed with more than 5<span><math><mi>σ</mi></math></span> significance at a 250 GeV centre-of-mass energy collider with <span><math><mrow><mn>5</mn><mspace></mspace><msup><mrow><mrow><mi>a</mi></mrow><mi>b</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> integrated luminosity if it has a mixing angle of at least 0.1 with the Standard Model Higgs, which means that a discovery can be achieved within the whole 95 % confidence-level region preferred by Large Electron Positron excess. Furthermore, including more decay channels such as <span><math><mrow><mi>S</mi><mo>→</mo><mi>τ</mi><mi>τ</mi></mrow></math></span> and <span><math><mrow><mi>Z</mi><mo>→</mo><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup></mrow></math></span> further enhances the discovery potential of future <span><math><mrow><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup></mrow></math></span> accelerators, like CEPC, CLIC, FCC-ee and ILC.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139953"},"PeriodicalIF":4.5,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Constant roll inflationary dynamics with generalized potentials in f(R,ϕ,X) gravity","authors":"A.I. Keskin ,&nbsp;Mehmet Yaşar ,&nbsp;K. Kurt","doi":"10.1016/j.physletb.2025.139947","DOIUrl":"10.1016/j.physletb.2025.139947","url":null,"abstract":"<div><div>In this work, we study early-time inflation within a class of <span><math><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>ϕ</mi><mo>,</mo><mi>X</mi><mo>)</mo></mrow></math></span> gravity models under a constant-roll condition. Employing a generalized potential of the form <span><math><mrow><mi>V</mi><msup><mrow><mo>(</mo><mi>ϕ</mi><mo>)</mo></mrow><mi>σ</mi></msup></mrow></math></span>, we derive expressions for the spectral index <span><math><msub><mi>n</mi><mi>s</mi></msub></math></span> and tensor-to-scalar ratio <span><math><mi>r</mi></math></span>, demonstrating that the inflationary dynamics are primarily governed by the parameter <span><math><mi>σ</mi></math></span> and the shape of the potential. At the upper limit of <span><math><msub><mi>n</mi><mi>s</mi></msub></math></span>, we obtain a de Sitter-like phase, while at the lower limit, the model transitions to a quintessence-like phase through an effective oscillating equation of state parameter (EoS). Therefore, under the tuning parameter <span><math><mrow><mi>σ</mi><mo>&lt;</mo><mn>1</mn></mrow></math></span>, the model exhibits a smooth transition from a de Sitter-like phase to a quintessence-like phase via the oscillating EoS parameter. The resulting predictions are consistent with recent observations from the Atacama Cosmology Telescope (ACT), combined with CMB lensing and DESI BAO data.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139947"},"PeriodicalIF":4.5,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"A comparative study of the absorption cross section of static regular black holes for electromagnetic field","authors":"Rajesh Karmakar","doi":"10.1016/j.physletb.2025.139951","DOIUrl":"10.1016/j.physletb.2025.139951","url":null,"abstract":"<div><div>In this article, we report our study on the absorption cross section for the electromagnetic field due to static spherically symmetric regular black holes of two distinct categories: the Fan-Wang generic class and the Simpson-Visser class. Existing studies on these two categories have relied on the WKB method, which applies to the low-frequency regime. In our analysis, we have numerically evaluated the absorption cross section for the electromagnetic field across all frequency ranges. To compute the absorption cross section, we followed a gauge-invariant approach, which avoids the need for gauge fixing for the electromagnetic field, thereby simplifying the methodology further. To emphasize the usefulness of this gauge invariant approach we have performed the same analysis for Simpson-Visser class black holes, which is more general in terms of the structure of the metric. For both types of regular black holes, the influence of regularization parameters on the absorption cross section reveals fundamental properties of their spacetime and their interactions with the surrounding astrophysical environment. Moreover, certain similarities observed between the Reissner-Nordström black hole and regular black holes of the Fan-Wang generic class indicate potential scenarios of correspondence between linear and nonlinear electrodynamics when coupled with gravity.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139951"},"PeriodicalIF":4.5,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Signals from Fermionic inflationary cosmology with Yukawa interaction","authors":"Lin-Hong Sui ,&nbsp;Dan Li ,&nbsp;Jia-Ze Sun ,&nbsp;Xi-Bin Li","doi":"10.1016/j.physletb.2025.139937","DOIUrl":"10.1016/j.physletb.2025.139937","url":null,"abstract":"<div><div>We investigate an inflationary model wherein the Dirac field <span><math><mi>ψ</mi></math></span> is directly coupled to a scalar inflaton <span><math><mi>ϕ</mi></math></span> via a Yukawa interaction <span><math><mrow><mi>g</mi><mi>ϕ</mi><mover><mi>ψ</mi><mo>¯</mo></mover><mi>ψ</mi></mrow></math></span> and examine the resulting observational implications. Within the slow-roll approximation, we derive analytical solutions of the Dirac equations during inflation. The analytical result on the fermion pair density <span><math><mrow><mo>〈</mo><mi>n</mi><mo>〉</mo></mrow></math></span> indicates that the Yukawa interaction strength <span><math><mi>g</mi></math></span> is to characterize the degree of non-adiabaticity. For large value of the dimensionless effective mass <span><math><mrow><mover><mi>m</mi><mo>˜</mo></mover><mo>=</mo><mrow><mo>(</mo><mi>m</mi><mo>+</mo><mi>g</mi><mi>ϕ</mi><mo>)</mo></mrow><mo>/</mo><mi>H</mi></mrow></math></span>, i.e. <span><math><mrow><mover><mi>m</mi><mo>˜</mo></mover><mo>≳</mo><mn>1</mn></mrow></math></span>, the tensor-to-scalar ratio <span><math><mi>r</mi></math></span> is suppressed by a factor of approximately <span><math><mrow><mn>1</mn><mo>/</mo><mo>(</mo><mn>1</mn><mo>+</mo><mn>2.95</mn><msup><mi>π</mi><mn>2</mn></msup><msup><mi>g</mi><mn>2</mn></msup><mo>)</mo></mrow></math></span>. This condition is also characterized by a significant backreaction. Conversely, if <span><math><mrow><mover><mi>m</mi><mo>˜</mo></mover><mo>≪</mo><mn>1</mn></mrow></math></span>, the value of <span><math><mi>r</mi></math></span> remains consistent with that observed in standard cold inflation. Our analysis is performed under the assumption of the highest inflationary energy scales compatible with current observational constraints.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139937"},"PeriodicalIF":4.5,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"A B−anomaly motivated Z′ boson at the energy and precision frontiers","authors":"Ben Allanach ,&nbsp;Christoph Englert ,&nbsp;Wrishik Naskar","doi":"10.1016/j.physletb.2025.139928","DOIUrl":"10.1016/j.physletb.2025.139928","url":null,"abstract":"<div><div>TeV-scale <span><math><msup><mi>Z</mi><mo>′</mo></msup></math></span> bosons with family-dependent couplings can explain some anomalies inferred from <span><math><mrow><mi>B</mi><mo>−</mo></mrow></math></span>meson measurements of processes involving the <span><math><mrow><mi>b</mi><mo>→</mo><mi>s</mi><msup><mi>ℓ</mi><mo>+</mo></msup><msup><mi>ℓ</mi><mo>−</mo></msup></mrow></math></span> transition. A <span><math><msup><mi>Z</mi><mo>′</mo></msup></math></span> originating from kinetically-mixed spontaneously broken <span><math><mrow><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><msub><mi>B</mi><mn>3</mn></msub><mo>−</mo><msub><mi>L</mi><mn>2</mn></msub></mrow></msub></mrow></math></span> gauge symmetry has been shown to greatly ameliorate global fits [1] in a ‘flavour-preferred’ region of parameter space. We provide an exploration of this region at the high luminosity (HL-)LHC with particular attention to which signals could be verified across different discovery modes. Even if the HL-LHC does not discover the <span><math><msup><mi>Z</mi><mo>′</mo></msup></math></span> boson in a resonant di-lepton channel, a FCC-ee <span><math><mi>Z</mi></math></span>-pole run would detect oblique corrections to the electroweak precision observables (EWPOs). Changes due to <span><math><msup><mi>Z</mi><mo>′</mo></msup></math></span>-induced non-oblique corrections are unlikely to be detected, to within experimental precision. In any case, the extended discovery potential offered by a 100 TeV <span><math><mrow><mi>p</mi><mi>p</mi><mo>−</mo></mrow></math></span>collider would afford sensitivity to the entire flavour-preferred region and enable a fine-grained and forensic analysis of the model.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139928"},"PeriodicalIF":4.5,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Mass varying neutrino oscillation in scalar-Gauss-Bonnet gravity","authors":"H. Mohseni Sadjadi,&nbsp;H. Yazdani Ahmadabadi","doi":"10.1016/j.physletb.2025.139942","DOIUrl":"10.1016/j.physletb.2025.139942","url":null,"abstract":"<div><div>We investigate how matter density affects neutrino oscillations by considering a mass-varying neutrino scenario where the neutrino mass depends on a scalar field. This scalar field is non-minimally coupled to the Gauss-Bonnet (GB) invariant, causing its profile to be implicitly influenced by the surrounding matter distribution. Using data from solar neutrino experiments, we derive constraints on the model parameters, providing new insights into the properties of mass-varying neutrino within the Gauss-Bonnet scalar-tensor framework.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139942"},"PeriodicalIF":4.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Jet momentum reconstruction in the QGP background with machine learning","authors":"Ran Li ,&nbsp;Yi-Lun Du ,&nbsp;Shanshan Cao","doi":"10.1016/j.physletb.2025.139940","DOIUrl":"10.1016/j.physletb.2025.139940","url":null,"abstract":"<div><div>We apply a Dense Neural Network (DNN) approach to reconstruct jet momentum within a quark-gluon plasma (QGP) background, using simulated data from PYTHIA and Linear Boltzmann Transport (LBT) Models for comparative analysis. We find that medium response particles from the LBT simulation, scattered out of the QGP background but belonging to medium-modified jets, lead to oversubtraction of the background if the DNN model is trained on vacuum jets from PYTHIA simulation. By training the DNN model on quenched jets generated using LBT or the combination of jet samples from PYTHIA and LBT, we significantly reduce this prediction bias and achieve more accurate background subtraction compared to conventional Area-based and Constituent Subtraction methods widely adopted in experimental measurements. We further study the performance of these machine learning models on evaluating the nuclear modification factor of jets, and find that while the unfolding procedure is necessary for correcting residuals in reconstructed jet momenta, models trained on samples incorporating quenched jets still achieve superior accuracy than those trained on vacuum jets even after unfolding.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139940"},"PeriodicalIF":4.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Helically twisted spacetime: Study of geometric and wave optics, and physical analysis","authors":"Edilberto O. Silva ,&nbsp;Frankbelson dos S. Azevedo ,&nbsp;Faizuddin Ahmed","doi":"10.1016/j.physletb.2025.139944","DOIUrl":"10.1016/j.physletb.2025.139944","url":null,"abstract":"<div><div>We analyse a stationary, cylindrically symmetric spacetime endowed with an intrinsic helical twist, <span><math><mrow><mi>d</mi><msup><mi>s</mi><mn>2</mn></msup><mo>=</mo><mo>−</mo><mi>d</mi><msup><mi>t</mi><mn>2</mn></msup><mo>+</mo><mi>d</mi><msup><mi>r</mi><mn>2</mn></msup><mo>+</mo><msup><mi>r</mi><mn>2</mn></msup><mi>d</mi><msup><mi>ϕ</mi><mn>2</mn></msup><mo>+</mo><msup><mrow><mo>(</mo><mi>d</mi><mi>z</mi><mo>+</mo><mi>ω</mi><mspace></mspace><mi>r</mi><mspace></mspace><mi>d</mi><mi>ϕ</mi><mo>)</mo></mrow><mn>2</mn></msup></mrow></math></span>. Solving the Einstein equations exactly yields an anisotropic energy–momentum tensor whose density is negative and decays as <span><math><msup><mi>r</mi><mrow><mo>−</mo><mn>2</mn></mrow></msup></math></span>, thus violating the weak energy condition near the axis. Three notable features emerge: (i) axis-centred negative energy; (ii) unequal transverse stresses; (iii) a torsional momentum flux <span><math><mrow><msub><mi>T</mi><mrow><mi>ϕ</mi><mi>z</mi></mrow></msub><mo>∝</mo><msup><mi>ω</mi><mn>3</mn></msup><mo>/</mo><mi>r</mi></mrow></math></span>. We identify stable photon orbits and deflection angle, fully helical geodesics, and torsion-controlled wave optics modes, suggesting laboratory analogues in twisted liquid-crystal and photonic systems. The coupling between the torsion parameter <span><math><mi>ω</mi></math></span> and other physical parameters leads to significant effects, altering the motion along the positive or negative <span><math><mi>z</mi></math></span>-axis. These results make the twisted helical metric a useful test bed for studying the interplay of curvature, torsion, and matter in both gravitational and condensed-matter contexts.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139944"},"PeriodicalIF":4.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Primordial black holes as cosmic expansion accelerators","authors":"Konstantinos Dialektopoulos ,&nbsp;Theodoros Papanikolaou ,&nbsp;Vasilios Zarikas","doi":"10.1016/j.physletb.2025.139948","DOIUrl":"10.1016/j.physletb.2025.139948","url":null,"abstract":"<div><div>We propose a novel and natural mechanism for cosmic acceleration driven by primordial black holes (PBHs) exhibiting repulsive behavior. Using a new “Swiss Cheese” cosmological approach, we demonstrate that this cosmic acceleration mechanism is a general phenomenon by examining three regular black hole spacetimes - namely the Hayward, the Bardeen and the Dymnikova spacetimes - as well as the singular de Sitter-Schwarzschild spacetime. Interestingly, by matching these black hole spacetimes with an isotropic and homogeneous expanding Universe, we obtain a phase of cosmic acceleration that ends at an energy scale characteristic to the black hole parameters or due to black hole evaporation. This cosmic acceleration mechanism can be relevant either to an inflationary phase with a graceful exit and reheating or to an early dark energy type of contribution pertinent to the Hubble tension. Remarkably, we find that ultra-light PBHs with masses <span><math><mrow><mi>m</mi><mo>&lt;</mo><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>8</mn></msup><mrow><mi>g</mi></mrow></mrow></math></span> dominating the energy content of the Univese before Big Bang Nucleosynthesis, can drive a successful inflationary expansion era without the use of an inflaton field. Additionally, PBHs with masses <span><math><mrow><mi>m</mi><mo>∼</mo><msup><mn>10</mn><mn>12</mn></msup><mrow><mi>g</mi></mrow></mrow></math></span> and abundances <span><math><mrow><mn>0.107</mn><mo>&lt;</mo><msubsup><mstyle><mi>Ω</mi></mstyle><mrow><mi>PBH</mi></mrow><mrow><mi>eq</mi></mrow></msubsup><mo>&lt;</mo><mn>0.5</mn></mrow></math></span>, slightly before matter-radiation equality, can produce a substantial amount of early dark energy, helping to alleviate the <span><math><msub><mi>H</mi><mn>0</mn></msub></math></span> tension.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139948"},"PeriodicalIF":4.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}