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The Light Front Formulation of Hadron Model with Valent Quarks 带有价夸克的强子模型的光锋公式
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701954
M. Malyshev, E. Prokhvatilov
{"title":"The Light Front Formulation of Hadron Model with Valent Quarks","authors":"M. Malyshev,&nbsp;E. Prokhvatilov","doi":"10.1134/S1547477124701954","DOIUrl":"10.1134/S1547477124701954","url":null,"abstract":"<p>Simple example of the light front construction of valent quark model of hadrons is presented which allows to classify the hadron states in orbital momentum and spin via introducing the spectral wave functions that depend on spatial coordinates of quarks. These wave functions correspond to the mass squared spectrum of hadrons and can be related to the spectrum of 3-dimensional quantum harmonic oscillator.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"126 - 130"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865530","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
Production of Single Isolated Photons in the Parton Reggeization Approach 在Parton正则化方法中产生单孤立光子
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701905
A. A. Chernyshev, V. A. Saleev
{"title":"Production of Single Isolated Photons in the Parton Reggeization Approach","authors":"A. A. Chernyshev,&nbsp;V. A. Saleev","doi":"10.1134/S1547477124701905","DOIUrl":"10.1134/S1547477124701905","url":null,"abstract":"<p>In the article, we study the processes of single isolated photon production at the LHC energies in the framework of the parton reggeization approach taking into account LO <span>(mathcal{O}({{alpha }^{1}}alpha _{S}^{0}))</span> and NLO* <span>(mathcal{O}({{alpha }^{1}}alpha _{S}^{0}))</span> contributions, the last one includes only tree–level corrections. Reggeized amplitudes are constructed according to the effective field theory formalism for multi–Regge kinematics processes suggested by L.N. Lipatov. To avoid the double counting between tree–level corrections and unintegrated parton distribution functions, a subtraction scheme is introduced. The results of calculations are compared with experimental data.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"95 - 99"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865535","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
Alternative to Lagrange Multiplier Method 拉格朗日乘数法的替代方法
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701838
V. S. Kurbatov
{"title":"Alternative to Lagrange Multiplier Method","authors":"V. S. Kurbatov","doi":"10.1134/S1547477124701838","DOIUrl":"10.1134/S1547477124701838","url":null,"abstract":"<p>In particle physics data analysis the so-called Lagrange Multiplier Method has been used for many years. It has been implemented in the 1960s by the famous Alvarez group for processing experimental data. Since then it is widely used in physical community. It is named after Lagrange who proposed the method for finding the minimum of functions of many variables under the requirement that they satisfy to some additional conditions (equalities, inequalities). The method uses some artificial variables called Lagrange multipliers having no physical meaning. Another approach is described here, to find the minimum of a function (in our case it is either <span>({{chi }^{2}})</span> or logarithm of Likelihood Function) with the constraints. The proposed method is based on the linearization of the constraints during a suitable iteration procedure for the search for the minimum. We propose a new method for selecting submatrices of partial derivatives Jacobi matrix in this paper.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"28 - 31"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865466","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
Decision Trees and Forests in Classification of Credit Institutions 信贷机构分类中的决策树与森林
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124701875
E. P. Akishina, V. V. Ivanov, A. S. Prikazchikova
{"title":"Decision Trees and Forests in Classification of Credit Institutions","authors":"E. P. Akishina,&nbsp;V. V. Ivanov,&nbsp;A. S. Prikazchikova","doi":"10.1134/S1547477124701875","DOIUrl":"10.1134/S1547477124701875","url":null,"abstract":"<p>A classification of credit institutions using trees and decision forests to identify high-risk objects is considered. The CART decision tree models and Random Forest, Adaboost, and Xgboost decision forests have been developed enabling identification of high-risk credit institutions. Two computing systems, the Google Colaboratory cloud service (Google Colab) and the HybriLIT heterogeneous platform, were used for the calculations.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"69 - 76"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865509","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
Analysis of Experimental Data on Neutron Decay to Determine the Possibility of Existence of a Right-Handed Vector Boson WR 中子衰变实验数据分析以确定右手矢量玻色子WR存在的可能性
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-04-23 DOI: 10.1134/S1547477124702157
A. P. Serebrov, O. M. Zherebtsov, A. K. Fomin, R. M. Samoilov, N. S. Budanov
{"title":"Analysis of Experimental Data on Neutron Decay to Determine the Possibility of Existence of a Right-Handed Vector Boson WR","authors":"A. P. Serebrov,&nbsp;O. M. Zherebtsov,&nbsp;A. K. Fomin,&nbsp;R. M. Samoilov,&nbsp;N. S. Budanov","doi":"10.1134/S1547477124702157","DOIUrl":"10.1134/S1547477124702157","url":null,"abstract":"<p>The analysis of the latest most accurate experimental data on neutron decay for the possibility of the existence of the right-handed vector boson <span>({{W}_{{text{R}}}})</span> is carried out. As a result of the analysis, it is found that there is an indication of the existence of the right-handed vector boson <span>({{W}_{{text{R}}}})</span> with a mass of <span>({{M}_{{{{W}_{{text{R}}}}}}} approx 319_{{ - 20}}^{{ + 26}})</span> GeV and a mixing angle with <span>({{W}_{{text{L}}}})</span>: ζ = –0.034 ± 0.013. This result should be considered, on the one hand, as a challenge to experimental physics at colliders, where the upper limit on the mass of the right-handed vector boson <span>({{W}_{{text{R}}}})</span> is significantly higher and, on the other hand, as evidence that even more accurate measurements of neutron decay and its theoretical analysis are needed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 1","pages":"229 - 235"},"PeriodicalIF":0.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865473","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
One-Zero Textures of Inverse Neutrino Mass Matrix with TM1 Variant of Trimaximal Mixing 三轴混合 TM1 变体的反向中微子质量矩阵的一零纹理
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701681
A. Raj,  Tapender, L. Singh, S. Verma
{"title":"One-Zero Textures of Inverse Neutrino Mass Matrix with TM1 Variant of Trimaximal Mixing","authors":"A. Raj,&nbsp; Tapender,&nbsp;L. Singh,&nbsp;S. Verma","doi":"10.1134/S1547477124701681","DOIUrl":"10.1134/S1547477124701681","url":null,"abstract":"<p>Trimaximal mixing pattern (TM<sub>1</sub>) of the neutrino mixing matrix is consistent with current neutrino oscillation data. In this work, we have investigated the phenomenology of inverse neutrino mass matrix (<span>(m_{nu }^{{ - 1}})</span>) with one-zero textures considering neutrino mixing matrix to be of TM<sub>1</sub> type. There are six possible patterns of <span>(m_{nu }^{{ - 1}})</span> with one-zero. We have obtained the predictions for the least known neutrino sector parameters such as octant of atmospheric mixing angle, <span>({{theta }_{{23}}})</span>, Dirac-type CP violating phase, δ, and effective Majorana neutrino mass, <span>({{m}_{{ee}}})</span>. One of the generic feature of this class of model is the existence of necessary CP violation, i.e., Dirac CP phase δ is non-zero. For maximal value of <span>({{theta }_{{23}}} = 45^circ )</span>, the model predicts maximal CP violation. The <span>(0nu beta beta )</span> decay experiments have imperative consequences for viability of one-zero texture in <span>(m_{nu }^{{ - 1}})</span>. It will either refute a model completely or have distinguishing implications for neutrino mass ordering in a model. We have also proposed two possible scenarios in which such phenomenological conjecture may be realized using non-Abelian discrete flavor symmetry group <span>({{A}_{4}})</span> and cyclic group <span>({{Z}_{3}})</span>.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1124 - 1138"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679791","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
Analysis of the Characteristics of an Electron Beam and Bremsstrahlung in the Air in the Field of an Electric Vibrator 电动振动器场中空气中的电子束和轫致辐射特性分析
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701759
B. Yu. Bogdanovich, G. O. Buyanov, A. V. Nesterovich, V. I. Kaminsky
{"title":"Analysis of the Characteristics of an Electron Beam and Bremsstrahlung in the Air in the Field of an Electric Vibrator","authors":"B. Yu. Bogdanovich,&nbsp;G. O. Buyanov,&nbsp;A. V. Nesterovich,&nbsp;V. I. Kaminsky","doi":"10.1134/S1547477124701759","DOIUrl":"10.1134/S1547477124701759","url":null,"abstract":"<p>Physical processes occurring during the propagation of a beam of accelerated electrons in the air are analyzed. The dynamics of particles in the air in the presence of an accompanying electromagnetic field is examined. The possibility of transporting electrons over long distances without a significant loss of beam intensity in the accompanying electromagnetic field was tested.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1181 - 1185"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679547","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
Characterization of Properties of 325-MHz Half-Wave Superconducting Resonators at Low Microwave Field Amplitudes 低微波场振幅下 325 兆赫半波超导谐振器的特性表征
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701735
A. Sukhotski, D. Bychanok, E. Gurnevich, H. Volunets, S. Huseu, S. Maksimenko, V. Petrakovski, A. Pakrouski, I. Pobol, V. Zalessky, Y. Tamashevich, M. Gusarova, M. Lalayan, S. Polozov, D. Nikiforov, Yu. Bespalov, A. Butenko, E. Syresin, G. Trubnikov
{"title":"Characterization of Properties of 325-MHz Half-Wave Superconducting Resonators at Low Microwave Field Amplitudes","authors":"A. Sukhotski,&nbsp;D. Bychanok,&nbsp;E. Gurnevich,&nbsp;H. Volunets,&nbsp;S. Huseu,&nbsp;S. Maksimenko,&nbsp;V. Petrakovski,&nbsp;A. Pakrouski,&nbsp;I. Pobol,&nbsp;V. Zalessky,&nbsp;Y. Tamashevich,&nbsp;M. Gusarova,&nbsp;M. Lalayan,&nbsp;S. Polozov,&nbsp;D. Nikiforov,&nbsp;Yu. Bespalov,&nbsp;A. Butenko,&nbsp;E. Syresin,&nbsp;G. Trubnikov","doi":"10.1134/S1547477124701735","DOIUrl":"10.1134/S1547477124701735","url":null,"abstract":"<p>A prototype of the 325-MHz niobium half-wave coaxial resonator (<span>(beta = 0.21)</span>) is developed, built, and tested at low microwave field amplitudes. Electromagnetic properties of the prototype in the superconducting state are investigated in the continuous wave regime and the damping regime using a highly stable radio-frequency (RF) generator and power detectors. The experimental data on the resonator’s response in the superconducting state are used to calculate its most important characteristics—the intrinsic <i>Q</i> value and the accelerating field. The experimentally measured <i>Q</i> value of the prototype is <span>({{Q}_{0}} = (3.5 pm 0.1) times {{10}^{8}})</span> at input powers of up to +20 dBm.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1170 - 1173"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1547477124701735.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of π– Meson Production in p + p, n + p, p + C, and π– + C Interactions Using the Target Mass Method 使用目标质量法研究 p + p、n + p、p + C 和 π- + C 相互作用中的π-介子产生
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701693
Ts. Baatar, A. A. Baldin, E. G. Baldina, B. Batgerel, A. I. Malakhov, N. Khishigbuyan, B. Otgongerel, M. Sovd, M. Urangua, R. Togoo, G. Sharkhuu
{"title":"Study of π– Meson Production in p + p, n + p, p + C, and π– + C Interactions Using the Target Mass Method","authors":"Ts. Baatar,&nbsp;A. A. Baldin,&nbsp;E. G. Baldina,&nbsp;B. Batgerel,&nbsp;A. I. Malakhov,&nbsp;N. Khishigbuyan,&nbsp;B. Otgongerel,&nbsp;M. Sovd,&nbsp;M. Urangua,&nbsp;R. Togoo,&nbsp;G. Sharkhuu","doi":"10.1134/S1547477124701693","DOIUrl":"10.1134/S1547477124701693","url":null,"abstract":"<p>The paper is devoted to the analysis of π<sup>–</sup> meson production in <span>(p + p)</span>, <span>(n + p)</span>, <span>(p + C)</span>, and <span>({{pi }^{ - }} + C)</span> reactions at different projectile energies. The description of these processes is important in understanding of the structure of nuclear matter. A method based on a relativistically invariant variable introduced by us is applied. This method allows one to observe a regularity in π<sup>–</sup> meson production for a wide set of reactions at different energies in terms of the relativistically invariant target mass variable. This gives grounds to assume that this representation has a predictive power and can be used in analysis of existing experimental data and planning experiments at the NICA accelerator complex.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1139 - 1144"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679792","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
Calibration Module for the Light-Readout System of a Prototype Liquid-Argon Time-Projection Chamber 液氩定时投影室原型光读出系统的校准模块
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701723
A. S. Selyunin, N. V. Anfimov, O. B. Samoylov, S. A. Sokolov, D. V. Fedoseev, A. V. Chetverikov
{"title":"Calibration Module for the Light-Readout System of a Prototype Liquid-Argon Time-Projection Chamber","authors":"A. S. Selyunin,&nbsp;N. V. Anfimov,&nbsp;O. B. Samoylov,&nbsp;S. A. Sokolov,&nbsp;D. V. Fedoseev,&nbsp;A. V. Chetverikov","doi":"10.1134/S1547477124701723","DOIUrl":"10.1134/S1547477124701723","url":null,"abstract":"<p>This paper presents a design of a calibration system for the Light Readout System of the prototype modular Liquid Argon Time-Projection Chamber (LArTPC) of the Near Detector of the Deep Underground Neutrino Experiment (DUNE). The calibration system and its components have been tested at the Joint Institute for Nuclear Research (JINR) and during the prototype LArTPC trials conducted at the University of Bern, Switzerland. The results demonstrate that the system fulfills its intended functionality, allowing for the calibration of the photodetectors in the light-readout system of the LArTPC and the study of its temporal characteristics.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1164 - 1169"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679740","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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