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Search for New Physics in ρ0 Meson Decays in the NA64 Experiment 在NA64实验中寻找ρ0介子衰变的新物理
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700330
S. V. Gertsenberger, A. V. Ivanov, A. S. Zhevlakov
{"title":"Search for New Physics in ρ0 Meson Decays in the NA64 Experiment","authors":"S. V. Gertsenberger,&nbsp;A. V. Ivanov,&nbsp;A. S. Zhevlakov","doi":"10.1134/S1547477126700330","DOIUrl":"10.1134/S1547477126700330","url":null,"abstract":"<p>The NA64 experimental setup is a universal detector designed to test a wide range of models beyond the Standard Model. Some of these models predict the existence of light dark matter particles, whose presence can be inferred from indirect evidence. The NA64 experiment is searching for such particles, specifically the dark photon <span>(A{kern 1pt} ')</span>—a vector mediator between ordinary and dark matter. This paper focuses on simulating a specific dark photon production channel: the decay of a <span>({{rho }^{0}})</span> meson into a dark photon, which subsequently decays into dark matter particles.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"534 - 537"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Design and Implementation of the Pilot Application for the SPD Online Filter SPD在线滤波器先导应用的设计与实现
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700731
L. R. Romanychev, D. A. Oleynik, N. V. Greben
{"title":"The Design and Implementation of the Pilot Application for the SPD Online Filter","authors":"L. R. Romanychev,&nbsp;D. A. Oleynik,&nbsp;N. V. Greben","doi":"10.1134/S1547477126700731","DOIUrl":"10.1134/S1547477126700731","url":null,"abstract":"<p>This paper presents the design and implementation of the Pilot application for the SPD online filter. We describe its architecture, components, and operational workflow, which leverages a late-binding mechanism for efficient resource utilization. A key feature is an adaptive workload management strategy that maximizes resource utilization by enabling GPU-node pilots to dynamically execute CPU-bound jobs. The results of testing using a DAQ emulator are presented.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"682 - 685"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the Strangeness Production in Xe + CsI Interactions with the BM@N Spectrometer 用BM@N谱仪研究Xe + CsI相互作用中奇异度的产生
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S154747712670038X
R. A. Zinchenko, A. I. Zinchenko, V. A. Vasendina, D. R. Drnoyan, D. A. Zinchenko, M. N. Kapishin, I. A. Rufanov
{"title":"Study of the Strangeness Production in Xe + CsI Interactions with the BM@N Spectrometer","authors":"R. A. Zinchenko,&nbsp;A. I. Zinchenko,&nbsp;V. A. Vasendina,&nbsp;D. R. Drnoyan,&nbsp;D. A. Zinchenko,&nbsp;M. N. Kapishin,&nbsp;I. A. Rufanov","doi":"10.1134/S154747712670038X","DOIUrl":"10.1134/S154747712670038X","url":null,"abstract":"<p>Study of the production of strange particles in nuclear interactions is one of the most important items of the BM@N experimental program at the Nuclotron-NICA accelerator complex, as strange probes carry information about the properties of the created nuclear medium. This paper presents preliminary results from a study of the production of Λ hyperons and <span>(K_{S}^{0})</span> mesons in Xe + CsI interactions at an energy <span>(sqrt {{{s}_{{NN}}}} = 3.26)</span> GeV.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"554 - 557"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Decoupling Resistive Onset from the Irreversibility Field in High-Temperature Superconducting Coated Conductors 高温超导涂层导体不可逆性场的解耦电阻起始
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700640
V. V. Guryev, S. N. Nikolaev
{"title":"Decoupling Resistive Onset from the Irreversibility Field in High-Temperature Superconducting Coated Conductors","authors":"V. V. Guryev,&nbsp;S. N. Nikolaev","doi":"10.1134/S1547477126700640","DOIUrl":"10.1134/S1547477126700640","url":null,"abstract":"<p>The irreversibility field (<i>H</i><sub>irr</sub>) marks the boundary below which flux lines are effectively pinned, enabling large, dissipation-free currents in type-II superconductors. In early high-temperature superconductors (HTS), the onset of electrical resistance in transport measurements was empirically observed to coincide with <i>H</i><sub>irr</sub>, leading to the widespread practice of using resistive transition as a proxy for the irreversibility line. This equivalence has since become a standard evaluation protocol, even for modern engineered materials. However, we demonstrate that this assumption no longer holds for REBCO-based coated conductors. Using combined magnetization and transport data from commercial tapes, we show a significant decoupling between μ<sub>0</sub><i>H</i><sub>irr</sub> ≈ 2.7 T and the resistive onset at ~6.4 T at 77 K—near the magnetically measured upper critical field <i>H</i><sub>c2</sub>. Relying solely on low-current transport measurements risks overestimating performance and compromising device reliability. Our findings call for a paradigm shift in the characterization of advanced HTS materials, emphasizing the necessity of complementary magnetic and electrical techniques to accurately assess their applicability limits.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"649 - 651"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
First-Principles Phonon Density of States of Graphite for Thermal Neutron Scattering Applications 热中子散射中石墨态声子密度的第一性原理研究
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700305
Nguyen Bich Thuy,  Pham Ngoc Son
{"title":"First-Principles Phonon Density of States of Graphite for Thermal Neutron Scattering Applications","authors":"Nguyen Bich Thuy,&nbsp; Pham Ngoc Son","doi":"10.1134/S1547477126700305","DOIUrl":"10.1134/S1547477126700305","url":null,"abstract":"<p>This study presents first-principles calculations of the phonon density of states (PhDOS) of graphite using density functional theory (DFT) within the local density approximation (LDA), as implemented in the Quantum ESPRESSO package. The calculated phonon spectrum exhibits characteristic vibrational features, including high-frequency in-plane optical modes reaching approximately 48 THz and low-frequency interlayer modes. The resulting PhDOS shows good agreement with the reference PhDOS derived from inelastic neutron scattering measurements, with minor discrepancies attributed to the harmonic approximation and finite-temperature effects. These results support the suitability of the LDA-based DFT approach for describing graphite lattice dynamics and provide a basis for constructing the thermal neutron scattering law <i>S</i>(α, β), thereby laying the groundwork for generating high-precision thermal scattering libraries for crystalline materials.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"521 - 525"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A ϕ(1020) Comparative Study between MC and Experimental Data for the BM@N Experiment BM@N实验中MC与实验数据的φ(1020)比较研究
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700354
R. Barak, S. Merts
{"title":"A ϕ(1020) Comparative Study between MC and Experimental Data for the BM@N Experiment","authors":"R. Barak,&nbsp;S. Merts","doi":"10.1134/S1547477126700354","DOIUrl":"10.1134/S1547477126700354","url":null,"abstract":"<p>The aim of this work is a comparative study of ϕ(1020) for the BM@N experiment. Both Monte-Carlo and experimental data were analyzed. Several distributions were considered during this process: residuals in FSD, GEM and ToF400 detectors for the two products of decay of ϕ(1020). Afterwards, necessary corrections were applied to the MC data to minimize its deviation from the experimental one. Finally, the invariant mass distribution was derived from the experimental data.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"542 - 545"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Searches for the Tensor Glueball in ψ(3686) Radiative Decays at BESIII 在BESIII的辐射衰减ψ(3686)中寻找张量胶球
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700408
P. Egorov
{"title":"Searches for the Tensor Glueball in ψ(3686) Radiative Decays at BESIII","authors":"P. Egorov","doi":"10.1134/S1547477126700408","DOIUrl":"10.1134/S1547477126700408","url":null,"abstract":"<p>Search for bound states of gluons–glueballs–remains one of the most important challenges of the modern QCD. Notable progress in this task has been achieved in various studies of <span>(J{text{/}}psi )</span> decays performed by the BESIII Collaboration. In this paper we present overview of the BESIII glueball search program. Preliminary results of one such study, radiative <span>(psi (3686))</span> decays into <span>({{pi }^{0}}{{pi }^{0}})</span> system, are shown as well.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"562 - 565"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modern BM@N Software Infrastructure: Security, Standardization, and Automation 现代BM@N软件基础设施：安全、标准化和自动化
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S154747712670069X
A. Chebotov, K. Gertsenberger, I. Romanov
{"title":"Modern BM@N Software Infrastructure: Security, Standardization, and Automation","authors":"A. Chebotov,&nbsp;K. Gertsenberger,&nbsp;I. Romanov","doi":"10.1134/S154747712670069X","DOIUrl":"10.1134/S154747712670069X","url":null,"abstract":"<p>Modern experiments in high-energy physics require complex software infrastructure for efficient processing and analysis of experiment data. This paper presents the results of the software infrastructure modernization in the BM@N experiment within the NICA project, where the improvements are aimed at unification, standardization, and enhancement of security of information systems and services. The article describes the transition to a unified JINR SSO authentication system integrated with the BM@N Keycloak solution for managing user groups and access rights, standardization of the technology stack with implementation of approaches based on the BFF (backend-for-frontend) pattern. Special attention is given to the BM@N Meet web application for managing videoconferencing resources by collaboration members. The implemented containerized architecture with automated recovery mechanisms ensures service scalability and high availability, significantly reducing system downtime during component failures.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"668 - 670"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advanced Setup for Performance Studies of Small Straw Tracker Prototypes for the SPD Detector 小型秸秆跟踪器原型SPD检测器性能研究的高级设置
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700603
S. Romakhov, A. Lapkin, E. Kuznetsova, V. Bautin, D. Sosnov, T. Enik, K. Salamatin, Y. Mukhamejanov, A. Mukhamejanova
{"title":"Advanced Setup for Performance Studies of Small Straw Tracker Prototypes for the SPD Detector","authors":"S. Romakhov,&nbsp;A. Lapkin,&nbsp;E. Kuznetsova,&nbsp;V. Bautin,&nbsp;D. Sosnov,&nbsp;T. Enik,&nbsp;K. Salamatin,&nbsp;Y. Mukhamejanov,&nbsp;A. Mukhamejanova","doi":"10.1134/S1547477126700603","DOIUrl":"10.1134/S1547477126700603","url":null,"abstract":"<p>A multi-functional setup has been developed for testing first prototypes of the SPD Straw Tracker. The setup was successfully operated during test beams at CERN in 2024 and 2025, combining a wide range of detectors and front-end electronics. It includes a reference timing system formed by four trigger scintillator counters with coincidence logic. The reference tracking system consists of a set of Micromegas detectors equipped with TIGER-based readout electronics, and a silicon TimePix4 detector. The setup is dedicated for performance studies of straw prototypes. One of the prototypes is a combined construction of three double-layers of straws with diameters of 5, 10, and 20 mm. Another one is reproducing the concept of the SPD Straw Tracker geometry which uses stereo-angle layers (“U” and “V”) additional to the layers “X” where the straws are aligned with the longitudinal SPD detector axis. This prototype consists of four XUVX double-layers. Several types of readout electronics are tested with those prototypes. All readout components have own independent data acquisition systems (DAQ). The developed offline synchronization approach allows to merge data acquired with different DAQs for further analysis.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"633 - 636"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reference Tracking System for Performance Studies of Small Straw Tracker Prototypes for the Future SPD Detector at the NICA Collider 用于NICA对撞机未来SPD探测器小型秸秆跟踪器原型性能研究的参考跟踪系统
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2026-09-22 DOI: 10.1134/S1547477126700615
M. Banchshikova, E. Kuznetsova, A. Lapkin, S. Romakhov, D. Sosnov, V. Bautin, K. Salamatin, T. Zholdybayev, T. Enik
{"title":"Reference Tracking System for Performance Studies of Small Straw Tracker Prototypes for the Future SPD Detector at the NICA Collider","authors":"M. Banchshikova,&nbsp;E. Kuznetsova,&nbsp;A. Lapkin,&nbsp;S. Romakhov,&nbsp;D. Sosnov,&nbsp;V. Bautin,&nbsp;K. Salamatin,&nbsp;T. Zholdybayev,&nbsp;T. Enik","doi":"10.1134/S1547477126700615","DOIUrl":"10.1134/S1547477126700615","url":null,"abstract":"<p>This paper presents performance studies of small straw tracker prototypes developed for further application in SPD NICA. To evaluate straw tracker prototype performance, reference tracking and timing system was used. Data collected during a muon test beam campaign at the SPS H4 beam line was analyzed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 5","pages":"637 - 640"},"PeriodicalIF":0.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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