The European Physical Journal C最新文献_第10页

Extracting energy from a non-Kerr rotating spacetime with an anomalous quadrupole moment via magnetic reconnection 通过磁重联从具有反常四极矩的非克尔旋转时空中提取能量

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16339-y

Ke Wang, Xiao-Xiong Zeng

引用次数: 0

One-loop renormalization of quark TMD in the light-cone gauge: CSS evolution 光锥规范中夸克TMD的单环重整化：CSS演化

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16305-8

Tolga Altinoluk, Guillaume Beuf, Jamal Jalilian-Marian

{"title":"One-loop renormalization of quark TMD in the light-cone gauge: CSS evolution","authors":"Tolga Altinoluk, Guillaume Beuf, Jamal Jalilian-Marian","doi":"10.1140/epjc/s10052-026-16305-8","DOIUrl":"10.1140/epjc/s10052-026-16305-8","url":null,"abstract":"<div>We calculate the one-loop corrections to the quark TMD (focusing on the divergences) in the light-cone gauge using the background field formalism, testing different prescriptions for the extra singularity present in the light-cone gauge propagator. We use the pure rapidity regulator for rapidity divergences. The Collins-Soper-Sterman (CSS) evolution equations are indeed obtained from the one loop renormalization of the quark TMD with all the considered prescriptions. In this setup, in the case of the Mandelstam-Leibbrandt (ML) prescription, the double log contribution to the CSS resummation is found to come from the ghost-like zero-mode brought by the ML prescription, in the diagrams with a gluon propagator ending on the transverse part of the gauge link at infinity. By contrast, when using any prescription defined in terms of a single light-cone vector, such as the Principal Value prescription or retarded or advanced prescriptions, the CSS double log contribution is found to come entirely from the quark-to-quark ladder diagram.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16305-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986851","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}

引用次数: 0

Probing EFT breakdown in the tails of (W^+ W^-) observables 探测(W^+ W^-)可观测物尾部的EFT击穿

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16081-5

Daniel Gillies, Andrea Banfi, Adam Martin

{"title":"Probing EFT breakdown in the tails of (W^+ W^-) observables","authors":"Daniel Gillies, Andrea Banfi, Adam Martin","doi":"10.1140/epjc/s10052-026-16081-5","DOIUrl":"10.1140/epjc/s10052-026-16081-5","url":null,"abstract":"<div>We test clipping effective field theory (EFT) simulations as a method of ensuring EFT validity. The procedure imposes that, at the level of the simulation, the invariant mass of a (W^+W^-) pair (M_{WW}) is less than the new physics scale (Lambda ). We compare this to two other methods, comparison bin by bin of dimension-6 and dimension-8 squared contributions and implementing a cut on data. We find that setting (M_{WW} < Lambda ) is not strict enough to ensure that the hierarchy of EFT operators is respected for dimension-6 and dimension-8 contributions. We also show that, even when using a stricter cut on (M_{WW}), due to different correlations between (M_{WW}) and (M_{emu }) at different EFT orders, the bins in (M_{emu }) (the invariant mass of the leptons originating from W decays) used in an EFT fit may not truly be in the regime of EFT validity when performing a dimension-6 fit with (M_{WW} < Lambda ). We also explore the correlations of three transverse mass observables: (M_{T1}, M_{T2}) and (M_{T3}), finding that (M_{T1}) and (M_{T3}) follow the (M_{WW}) distribution more closely than (M_{emu }). We present sensitivity studies using both the (M_{T3}) distribution and (M_{emu }) distribution. We test implementing an experimental cut on (M_{T3}) in place of clipping the EFT simulation at (M_{WW} < Lambda ). We finally comment that adding (M_{WW} < Lambda ) cuts only to the EFT simulation could be interpreted as modifying the SMEFT expansion by a form factor and could therefore impact the model independence of EFT fits under this procedure. \u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16081-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986857","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}

引用次数: 0

Pseudoscalar Yukawa coupling induced helical asymmetry in fermionic preheating 伪标量汤川耦合诱导费米子预热中的螺旋不对称

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16298-4

Ke Fu, Li-Shuang Liu, Yu-Feng Wang, Xin-Yu Gu, Xi-Bin Li

{"title":"Pseudoscalar Yukawa coupling induced helical asymmetry in fermionic preheating","authors":"Ke Fu, Li-Shuang Liu, Yu-Feng Wang, Xin-Yu Gu, Xi-Bin Li","doi":"10.1140/epjc/s10052-026-16298-4","DOIUrl":"10.1140/epjc/s10052-026-16298-4","url":null,"abstract":"<div>In this study, we investigate the fermionic helical asymmetry during preheating by introducing a model in which the Dirac field (psi ) couples to the scalar inflaton (phi ) directly through the pseudoscalar Yukawa mechanism described by the term (- gfrac{phi }{f} m_psi bar{psi }textrm{i}gamma ^5 psi ). Following inflation, as the inflaton oscillates around the minimum of its potential, the effective frequency of Dirac field changes non-adiabatically, resulting in particle production. These oscillations also indicate that the pseudo-mass (m_5 = g phi m_psi /f) changes the sign, leading to the production of helical-asymmetric fermions. We employ the WKB method to analytically calculate the transition relations of the Bogoliubov coefficients, which is valid for an arbitrary number of productions and demonstrates a significant difference compared to the case without asymmetry. In the expanding universe, the presence of pseudo-mass (m_5) alters the Gaussian distributions for each helical state, since the combined effects of Pauli blocking and parametric resonance produce coherent enhancement and coherent suppression in certain frequency ranges. This departure arises from the imaginary component of the first-order adiabatic complex phase, denoted as (varTheta ^{(r)}_{1}). The real part of (varTheta ^{(r)}_{1}) significantly enhances the number density of each helical state after eight oscillations of the inflaton since the coherent superposition. These conclusions have also been validated by the numerical results.\u0000\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16298-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986854","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}

引用次数: 0

Ruppeiner thermodynamic geometry, microstructure, quasinormal modes and greybody factors of the Einstein–Skyrme black hole Ruppeiner Einstein-Skyrme黑洞的热力学几何、微观结构、准正态模态和灰体因子

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16230-w

Shakhboz Khasanov, Akmal Safarov, Bo Yang, Habtamu Menberu Tedila

{"title":"Ruppeiner thermodynamic geometry, microstructure, quasinormal modes and greybody factors of the Einstein–Skyrme black hole","authors":"Shakhboz Khasanov, Akmal Safarov, Bo Yang, Habtamu Menberu Tedila","doi":"10.1140/epjc/s10052-026-16230-w","DOIUrl":"10.1140/epjc/s10052-026-16230-w","url":null,"abstract":"<div>We investigate the thermodynamic microstructure, quasinormal mode spectrum, and greybody factors of the exact, static, spherically symmetric black hole in Einstein–Skyrme theory, building on the recently established first law that promotes the Skyrme couplings K and (lambda ) to extensive variables. Using Ruppeiner geometry, we construct the scalar curvature from the Hessian of the mass. The curvature remains finite at the second-order (heat-capacity) phase transition but diverges in the extremal, zero-temperature limit. Throughout the physically admissible region the curvature retains a single sign, indicating microscopic interactions of one dominant (attractive) type whose strength grows toward extremality. We perform a Joule–Thomson-like isenthalpic expansion and prove analytically that the corresponding coefficient is strictly negative across the entire physical parameter space, implying the black hole always cools as (lambda ) increases at fixed mass, with no inversion temperature. Turning to perturbations, we derive the effective potential for massless scalar fields. The solid-angle-deficit coupling K controls its shape – substantially lowering the barrier – while at fixed K the quartic coupling (lambda ) produces only minor changes. Rigorous lower bounds on greybody factors are obtained in closed form using Visser’s method: increasing K raises the bound, since a larger horizon lowers the centrifugal barrier, whereas increasing (lambda ) mildly suppresses low-frequency transmission. Our results provide the first comprehensive study of the thermodynamic microstructure and perturbative spectroscopy of this rare analytic hairy black hole, complementing and extending the existing thermodynamic analysis into previously unexplored territory.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16230-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986850","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}

引用次数: 0

New constraints on cosmic-ray boosted sub-Gev dark matter via light mediators 对宇宙射线的新限制通过光介质促进了次gev暗物质

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16368-7

Yang Yu, Guan-Sen Wang, Bo Zhang, Tian-Peng Tang, Bing-Yu Su, Lei Feng

引用次数: 0

Probing effective field theory corrections with quasinormal modes and gravitational lensing in Reissner–Nordström black holes 利用Reissner-Nordström黑洞中的准正态模和引力透镜探测有效场论修正

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16326-3

Takamasa Kanai

{"title":"Probing effective field theory corrections with quasinormal modes and gravitational lensing in Reissner–Nordström black holes","authors":"Takamasa Kanai","doi":"10.1140/epjc/s10052-026-16326-3","DOIUrl":"10.1140/epjc/s10052-026-16326-3","url":null,"abstract":"<div>Effective field theory (EFT) provides a systematic framework for parametrizing possible higher-energy corrections to general relativity through higher-curvature interactions. In this work, we investigate gravitational lensing in both weak- and strong-field regimes for EFT-corrected Reissner-Nordström black hole spacetimes, focusing on both weakly charged and near-extremal configurations. Using the strong deflection limit formalism, we derive the corresponding corrections to the deflection angle, photon sphere radius, critical impact parameter, and strong lensing coefficients induced by higher-derivative curvature-electromagnetic interactions. Our analysis is restricted to purely geometrical corrections associated with modifications of the background spacetime geometry, without including polarization-dependent corrections to the photon propagation law. We show that strong gravitational lensing observables in charged black hole backgrounds can provide complementary probes of effective interactions between gravity and electromagnetic fields. These results suggest that future high-precision observations of strong lensing phenomena may place constraints on higher-curvature EFT couplings beyond general relativity.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16326-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986853","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}

引用次数: 0

Comprehensive study of cosmogenic neutron production in large liquid scintillator detectors 大型液体闪烁体探测器宇宙中子产生的综合研究

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16173-2

Yijian Jiang, Jie Cheng, Haoqi Lu, Yaoguang Wang

{"title":"Comprehensive study of cosmogenic neutron production in large liquid scintillator detectors","authors":"Yijian Jiang, Jie Cheng, Haoqi Lu, Yaoguang Wang","doi":"10.1140/epjc/s10052-026-16173-2","DOIUrl":"10.1140/epjc/s10052-026-16173-2","url":null,"abstract":"<div>Neutrons produced by cosmic ray muons constitute a significant background for underground experiments investigating neutron oscillations, neutrinoless double beta decay, dark matter, and other rare event signals. This work benchmarks measured neutron yields and neutron multiplicities—with a focus on data from the Daya Bay Reactor Neutrino Experiment—against comprehensive simulations using three GEANT4 hadronic physics lists. These simulations are further refined via a TALYS-based adjustment of hadronic cross sections. For the BERT-based models, the adjustment reduces the discrepancy in the total neutron yield from about 20% to approximately 6%, while for the BIC-based model it improves the agreement from roughly 13% to the sub-percent level ((sim )0.3%), indicating markedly better consistency of the BIC-based model with the experimental data. Nevertheless, a clear tension persists: simulations systematically underproduce single-neutron events while overproducing multi-neutron events. The study establishes a reproducible benchmark for cosmogenic neutron modeling and proposes a targeted refinement strategy—including channel-specific reweighting and intranuclear cascade parameter tuning—to guide future model development.</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16173-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986782","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}

引用次数: 0

Advanced statistical analysis of linear and nonlinear Regge trajectories for light non-strange mesons 轻非奇异介子线性和非线性雷格轨迹的高级统计分析

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16378-5

S. S. Afonin

{"title":"Advanced statistical analysis of linear and nonlinear Regge trajectories for light non-strange mesons","authors":"S. S. Afonin","doi":"10.1140/epjc/s10052-026-16378-5","DOIUrl":"10.1140/epjc/s10052-026-16378-5","url":null,"abstract":"<div>A rigorous statistical analysis of Regge-type trajectories for light non-strange meson mass spectra is carried out, which explicitly accounts for experimental uncertainties. We test three scenarios: a linear model with distinct radial (n) and orbital (l) slopes (Model 1), a linear model with a universal slope (Model 2), and a nonlinear model featuring a universal slope and a Dirac-Coulomb-type term (propto (l+1)^{-1}) (Model 3). Optimization is performed using a nonlinear (chi ^2) minimization framework, where the intrinsic theoretical model uncertainty is determined self-consistently by enforcing (chi ^2/text {dof} = 1). To ensure robust model selection, we employ the Akaike and Bayesian information criteria alongside complementary statistical tests. Our analysis demonstrates that moderate deviations from linearity in the Regge spectrum are predominantly localized within the S-wave resonance sector. These distortions are successfully accommodated by the nonlinear correction in Model 3, from which an approximate Coulomb-type degeneracy, (m^2(n,l) propto n+l), emerges as a statistically robust feature. Furthermore, we show that the l-dependent correction to the principal quantum number in light non-strange mesons is consistent with the leading-order relativistic correction to the Coulomb problem. The statistical inferences gained in our analysis can provide an efficient tool for identifying non-(qbar{q}) candidates in the light meson spectrum. For example, the masses of three main candidates for the lightest scalar glueball – the scalar mesons (f_0(1370)), (f_0(1500)) and (f_0(1710)) – lie on the corresponding radial trajectories of the ordinary (qbar{q})-states.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16378-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986852","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}

引用次数: 0

Scalar fields, impurities and supersymmetry 标量场，杂质和超对称

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-18 DOI: 10.1140/epjc/s10052-026-16360-1

D. Bazeia, A. C. Lehum, G. S. Santiago

引用次数: 0