The European Physical Journal C最新文献_第4页

Molecular states with bottom mesons and multistrange baryons systems 具有底介子和多奇异重子系统的分子态

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-07 DOI: 10.1140/epjc/s10052-025-14869-5

Jing Song, Yi-Yao Li, Eulogio Oset

引用次数: 0

Deep-inelastic scattering at TeV energies with LHC muons LHC介子在TeV能量下的深度非弹性散射

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-06 DOI: 10.1140/epjc/s10052-025-14829-z

Reinaldo Francener, Victor P. Gonçalves, Felix Kling, Peter Krack, Juan Rojo

{"title":"Deep-inelastic scattering at TeV energies with LHC muons","authors":"Reinaldo Francener, Victor P. Gonçalves, Felix Kling, Peter Krack, Juan Rojo","doi":"10.1140/epjc/s10052-025-14829-z","DOIUrl":"10.1140/epjc/s10052-025-14829-z","url":null,"abstract":"<div>The LHC far-forward experiments FASER and SND@LHC have pioneered the detection of TeV-energy neutrinos produced in hard-scattering proton-proton collisions at the LHC. In addition to neutrinos, an intense flux of TeV-energy muons reaches these detectors, representing a dominant background for both neutrino studies and beyond the Standard Model searches. Here we demonstrate that this forward muon flux enables a comprehensive neutral-current deep-inelastic scattering (DIS) program at FASER with a strong kinematical overlap with the Electron Ion Collider. For the Run 3 luminosity of ({mathcal {L}}_{{textrm{pp}}}=250) fb(^{-1},) more than (10^5) inclusive muon DIS events, of which up to (10^4) from charm production, are expected at FASER(nu .) As a representative application, we demonstrate the sensitivity of muon DIS at FASER(nu ) to probe the (intrinsic) charm content of the proton at large-x. We also provide predictions for event yields of muon DIS for future FASER runs and for the proposed Forward Physics Facility.\u0000\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14829-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256313","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

Neutrino production in the central dark-matter spikes of active galaxies 活跃星系中心暗物质尖峰中的中微子产生

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-06 DOI: 10.1140/epjc/s10052-025-14848-w

Polina Kivokurtseva

引用次数: 0

Background-dependent and classical correspondences between f(Q) and f(T) gravity f(Q)和f(T)引力之间的背景相关和经典对应关系

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-06 DOI: 10.1140/epjc/s10052-025-14822-6

Cheng Wu, Xin Ren, Yuhang Yang, Yu-Min Hu, Emmanuel N. Saridakis

{"title":"Background-dependent and classical correspondences between f(Q) and f(T) gravity","authors":"Cheng Wu, Xin Ren, Yuhang Yang, Yu-Min Hu, Emmanuel N. Saridakis","doi":"10.1140/epjc/s10052-025-14822-6","DOIUrl":"10.1140/epjc/s10052-025-14822-6","url":null,"abstract":"<div>f(Q) and f(T) gravity are based on fundamentally different geometric frameworks, yet they exhibit many similar properties. This article provides a comprehensive summary and comparative analysis of the various theoretical branches of torsional gravity and non-metric gravity, which arise from different choices of affine connection. We identify two types of background-dependent and classical correspondences between these two theories of gravity. The first correspondence is established through their equivalence within the Minkowski spacetime background. To achieve this, we develop the tetrad-spin formulation of f(Q) gravity and derive the corresponding expression for the spin connection. The second correspondence is based on the equivalence of their equations of motion. Utilizing a metric-affine approach, we derive the general affine connection for static and spherically symmetric spacetime in f(Q) gravity and compare its equations of motion with those of f(T) gravity. Among others, our results reveal that, f(T) solutions are not simply a subset of f(Q) solutions; rather, they encompass a complex solution beyond f(Q) gravity in black hole background.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14822-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256312","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

Inflationary power spectrum from the Lanczos algorithm 从Lanczos算法得到的暴胀功率谱

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-04 DOI: 10.1140/epjc/s10052-025-14791-w

Ke-Hong Zhai, Lei-Hua Liu, Hai-Qing Zhang

{"title":"Inflationary power spectrum from the Lanczos algorithm","authors":"Ke-Hong Zhai, Lei-Hua Liu, Hai-Qing Zhang","doi":"10.1140/epjc/s10052-025-14791-w","DOIUrl":"10.1140/epjc/s10052-025-14791-w","url":null,"abstract":"<div>The generalized Lanczos algorithm can provide a universal method for constructing a wave function under the the Hamiltonian group structure. Based on this fact, we obtain an open two-mode squeezed state as the quantum origin for the curvature perturbation. In light of this wave function in the open system, we successfully develop a new method to calculate its corresponding power spectrum by using the Bogoliubov transformation. Unlike traditional approaches, we explicitly retain the Bogoliubov coefficients in terms of the squeezing amplitude ( r_k ) and the squeezing rotation angle ( phi _k ). As a result, the power spectrum of the open two-mode squeezed state will match that of the Bunch–Davies vacuum numerically. Furthermore, the derivation of the open two-mode squeezed state relies on a Meixner polynomial of the second kind (equivalent to the generalized Lanczos algorithm) and the symmetry of the Hamiltonian. Therefore, our research may offer a new insight into the calculation of correlation functions through a group-theoretic perspective.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14791-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210262","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

Neutron source-based event reconstruction algorithm in large liquid scintillator detectors 基于中子源的大型液体闪烁体探测器事件重建算法

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-04 DOI: 10.1140/epjc/s10052-025-14808-4

Akira Takenaka, Zhangming Chen, Arran Freegard, Junting Huang, Jiaqi Hui, Haojing Lai, Rui Li, Yilin Liao, Jianglai Liu, Yue Meng, Iwan Morton-Blake, Ziqian Xiang, Ping Zhang

{"title":"Neutron source-based event reconstruction algorithm in large liquid scintillator detectors","authors":"Akira Takenaka, Zhangming Chen, Arran Freegard, Junting Huang, Jiaqi Hui, Haojing Lai, Rui Li, Yilin Liao, Jianglai Liu, Yue Meng, Iwan Morton-Blake, Ziqian Xiang, Ping Zhang","doi":"10.1140/epjc/s10052-025-14808-4","DOIUrl":"10.1140/epjc/s10052-025-14808-4","url":null,"abstract":"<div>We developed an event reconstruction algorithm, applicable to large liquid scintillator detectors, built primarily upon neutron calibration data. We employ a likelihood method using photon detection time and charge information from individual photomultiplier tubes. Detector response tables in the likelihood function were derived from americium-carbon neutron source events, 2.2 MeV (gamma )-ray events from cosmic-ray muon spallation neutrons, and laser calibration events. This algorithm can reconstruct the event position, energy, and also has the capability to differentiate particle types for events within the energy range of reactor neutrinos. Using the detector simulation of the Jiangmen Underground Neutrino Observatory (JUNO) experiment as a large liquid scintillator detector example, we demonstrate that the presented reconstruction algorithm has a reconstructed position accuracy within (pm 4) cm, and a reconstructed energy non-uniformity under 0.5% throughout the central detector volume. The vertex resolution for positron events at 1 MeV is estimated to be around 9 cm, and the energy resolution is confirmed to be comparable to that in the JUNO official publication. Furthermore, the algorithm can eliminate 80% (45%) of (alpha )-particle (fast-neutron) events while maintaining a positron event selection efficiency of approximately 99%.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14808-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210267","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

Entangled Unruh–DeWitt detectors amplify quantum coherence 纠缠的Unruh-DeWitt探测器放大了量子相干性

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-03 DOI: 10.1140/epjc/s10052-025-14832-4

Shu-Min Wu, Yu-Xuan Wang, Wentao Liu

{"title":"Entangled Unruh–DeWitt detectors amplify quantum coherence","authors":"Shu-Min Wu, Yu-Xuan Wang, Wentao Liu","doi":"10.1140/epjc/s10052-025-14832-4","DOIUrl":"10.1140/epjc/s10052-025-14832-4","url":null,"abstract":"<div>We explore the quantum coherence between a pair of entangled Unruh–DeWitt detectors, interacting with a quantum field, using a nonperturbative approach in a (3+1)-dimensional Minkowski spacetime with instantaneous switching ((delta )-switching). It is intriguing to observe that for a maximally entangled state, increasing the coupling strength enhances the detectors’ initial quantum coherence while simultaneously causing a monotonic decrease in their initial entanglement. This reveals a remarkable phenomenon: through nonperturbative interactions, entangled Unruh–DeWitt detectors can exhibit a dual effect-amplifying quantum coherence while degrading quantum entanglement. This finding stands in stark contrast to previous studies based on perturbative methods or Gaussian switching functions, which generally concluded that interactions between detectors and the field lead to a simultaneous degradation of quantum coherence and entanglement due to environmental decoherence. Notably, while initially separable detectors successfully harvest quantum coherence from the vacuum, entanglement extraction remains fundamentally prohibited. These contrasting behaviors underscore the fundamental distinction between coherence and entanglement as quantum resources, and highlight their complementary roles in field-detector interactions. \u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14832-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210338","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

Phase transition in a doubly holographic model of closed dS2 spacetime 封闭dS2时空双全息模型中的相变

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-03 DOI: 10.1140/epjc/s10052-025-14817-3

Wen-Hao Jiang, Cheng Peng, Yun-Song Piao

引用次数: 0

Triple gauge coupling analysis using boosted W’s and Z’s 使用增强W和Z的三量规耦合分析

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-03 DOI: 10.1140/epjc/s10052-025-14801-x

O. J. P. Éboli, Tathagata Ghosh, Matheus Martines, Sujay Shil

引用次数: 0

Gravitational waves from cosmological first-order phase transitions with precise hydrodynamics 宇宙一阶相变引力波与精确流体力学

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-10-02 DOI: 10.1140/epjc/s10052-025-14826-2

Chi Tian, Xiao Wang, Csaba Balázs

{"title":"Gravitational waves from cosmological first-order phase transitions with precise hydrodynamics","authors":"Chi Tian, Xiao Wang, Csaba Balázs","doi":"10.1140/epjc/s10052-025-14826-2","DOIUrl":"10.1140/epjc/s10052-025-14826-2","url":null,"abstract":"<div>We calculate the gravitational wave spectrum generated by sound waves during a cosmological phase transition, incorporating several advancements beyond the current state-of-the-art. Rather than relying on the bag model or similar approximations, we derive the equation of state directly from the effective potential. This approach enables us to accurately determine the hydrodynamic quantities, which serve as initial conditions in a generalised hybrid simulation. This simulation tracks the fluid evolution after bubble collisions, leading to the generation of gravitational waves. Our work thus provides a self-consistent numerical calculation of gravitational waves for the real singlet extension of the standard model. Our computational method is adaptable to any particle physics model, offering a fast and reliable way to calculate gravitational waves generated by sound waves. With fewer approximations, our approach provides a robust foundation for precise gravitational wave calculations and allows for the exploration of model-independent features of gravitational waves from phase transitions.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 10","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14826-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210414","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