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Dark Matter Mixing within the Seesaw Type II Mechanism in the Left-Right Symmetric Model 左右对称模型中跷跷板II型机制中的暗物质混合
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125700852
M. N. Dubinin, E. Yu. Fedotova, D. M. Kazarkin
{"title":"Dark Matter Mixing within the Seesaw Type II Mechanism in the Left-Right Symmetric Model","authors":"M. N. Dubinin,&nbsp;E. Yu. Fedotova,&nbsp;D. M. Kazarkin","doi":"10.1134/S1547477125700852","DOIUrl":"10.1134/S1547477125700852","url":null,"abstract":"<p>The seesaw type II mechanism is considered within the framework of a left-right chiral model with a gauge group <span>(SU{{(2)}_{L}} times SU{{(2)}_{R}} times U(1))</span>, the lepton sector of which includes three generations of heavy Majorana neutrinos. The dependence of the mixing parameters of the lightest sterile neutrino as a dark matter particle on the scales of left-right symmetry breaking in the case of direct and inverse hierarchies of active neutrino masses is analyzed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"966 - 969"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210453","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
Calculations of Azimuthal Flows in Collisions of Heavy Ions Using the Reaction Plane and Two-Particle Cumulant Methods at the HYDJET++ for LHC Energies 用反应平面和双粒子累积量方法计算大型强子对撞机重离子碰撞的方位流
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701092
D. Myagkov, S. Petrushanko
{"title":"Calculations of Azimuthal Flows in Collisions of Heavy Ions Using the Reaction Plane and Two-Particle Cumulant Methods at the HYDJET++ for LHC Energies","authors":"D. Myagkov,&nbsp;S. Petrushanko","doi":"10.1134/S1547477125701092","DOIUrl":"10.1134/S1547477125701092","url":null,"abstract":"<p>Monte Carlo models are widely used to study relativistic heavy-ion collisions, that is matter under extreme conditions through the analysis of azimuthal distributions of secondary particles. HYDJET++ is one such model. While initially relying on the true reaction plane method for azimuthal flow calculations, this approach is impractical for experimental comparisons. We enhanced HYDJET++ by implementing additional methods used in experiments, including reaction plane and cumulant techniques. Using this updated model, we simulated Pb–Pb and Xe–Xe collisions at <span>(sqrt {{{s}_{{NN}}}} = 5.02)</span> TeV and <span>(sqrt {{{s}_{{NN}}}} = 5.44)</span> TeV per nucleon pair in c.m.s respectively, calculating <span>({{v}_{2}})</span> and <span>({{v}_{3}})</span> flows via three methods and comparing them with each other and CMS data. These improvements refine the generator’s applicability, highlight areas requiring further optimization, and expand its potential for future research.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1055 - 1057"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210492","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
Simulation of the Momentum Distributions of the Spectator Fragments in 124XeВ Collisions at the BM@N with Accounting for Pre-Equilibrium Clusterization 考虑预平衡聚类的BM@N处124XeВ碰撞中旁观碎片动量分布的模拟
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701110
E. Vasyagina, S. Savenkov, A. Svetlichnyi
{"title":"Simulation of the Momentum Distributions of the Spectator Fragments in 124XeВ Collisions at the BM@N with Accounting for Pre-Equilibrium Clusterization","authors":"E. Vasyagina,&nbsp;S. Savenkov,&nbsp;A. Svetlichnyi","doi":"10.1134/S1547477125701110","DOIUrl":"10.1134/S1547477125701110","url":null,"abstract":"<p>In this work the Abrasion-Ablation Monte Carlo for Colliders model with and without MST-clustering was employed to characterise the momentum distribution of produced spectator fragments. The simulation results suggest that pre-equilibrium fragmentation with accounting for Coulomb interaction between charged spectator fragments lead to an increase of their mean transverse momentum <span>({{p}_{T}})</span>, bringing the calculations closer to experimental data. The pseudorapidity distributions of H, He, Li spectator fragments from 3.26<span>(A)</span> GeV <span>(^{{124}})</span>XeВ collisions at the BM@N were calculated.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1062 - 1064"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210493","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
Data Fitter of Neutrino Oscillation Experiments in the GNA Software GNA软件中中微子振荡实验的数据滤波
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701298
A. V. Stepanova, L. D. Kolupaeva
{"title":"Data Fitter of Neutrino Oscillation Experiments in the GNA Software","authors":"A. V. Stepanova,&nbsp;L. D. Kolupaeva","doi":"10.1134/S1547477125701298","DOIUrl":"10.1134/S1547477125701298","url":null,"abstract":"<p>Although neutrino physics has been actively developing for a last few decades some questions are still not answered. One of urgent tasks is to measure neutrino oscillation parameters such as the charge-parity phase <span>({{delta }_{{{text{CP}}}}})</span>, the neutrino mass ordering, and the octant of the mixing angle <span>({{theta }_{{{text{23}}}}})</span>. One of the ways to reach a high significant level for these values is to combine data taken from various experiments. Currently operating neutrino accelerator experiments, NOvA and T2K, have been detecting neutrino interactions in electron (anti)neutrino appearance and muon (anti)neutrino disappearance modes, and nowadays these data are the main source of information to estimate unknown neutrino oscillation parameters. The data fitter of accelerator neutrino experiments is created within the GNA software and 2D contours of individual and combined sensitivities to <span>(Delta m_{{{text{32}}}}^{{text{2}}},;{{delta }_{{{text{CP}}}}})</span> and <span>({{sin }^{2}}{{theta }_{{{text{23}}}}})</span> for NOvA and T2K experiments are plotted based on Monte-Carlo simulation and Asimov data.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1132 - 1135"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210771","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
Quality Random Number Generator 质量随机数发生器
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701043
M. Dima, M.-T. Dima, S. Dima, M. Mihailescu
{"title":"Quality Random Number Generator","authors":"M. Dima,&nbsp;M.-T. Dima,&nbsp;S. Dima,&nbsp;M. Mihailescu","doi":"10.1134/S1547477125701043","DOIUrl":"10.1134/S1547477125701043","url":null,"abstract":"<p>Numerous applications in physics and technology rely on random number generation: for Monte Carlo purposes, key distribution, and other tasks. For these elaborate hash functions with carefully studied and tuned algorithms have been developed, giving pseudo-random numbers. Depending on the complexity and quality of their output, they vary from very good quality (such as RANLUX with a 10<sup>171</sup> repetition period), to fast algorithms, however of lesser period (such as the Mersenne Twister, a factor of ca. ×40 faster). We here present the implementation of a true-random number “multiplier” algorithm. The algorithm relies on a finite set of true-random numbers from a physical source (in our case 0.2 M atmospheric noise random numbers in the range of 0–9999). The algorithm produces new numbers by combining pairs of 2 random numbers from the list, situated at random distance apart. The random offset is calculated by a shift register structure involving both the local rand() generator, and numbers from the list itself, whereby it produces “non-repetitive repetitions”—i.e., our multiplier has no known period. The tests, performed with the DieHarder [1] test suite, show good quality.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1036 - 1040"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210522","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
Extrapolation of Four-Dimensional Gauge-Yukawa Theories to Ultraviolet 四维量规-汤川理论对紫外线的外推
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125700864
A. Mukhaeva
{"title":"Extrapolation of Four-Dimensional Gauge-Yukawa Theories to Ultraviolet","authors":"A. Mukhaeva","doi":"10.1134/S1547477125700864","DOIUrl":"10.1134/S1547477125700864","url":null,"abstract":"<p>We investigate four-dimensional renormalisible gauge-Yukawa theory with all possible dimension-4 operators which exhibit asymptotic safety. We calculated all <span>(beta )</span>-functions and interacting ultraviolet fixed points at 2-loop for gauge, 1-loop for Yukawa and scalar fields.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"970 - 972"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210449","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 Reconstruction Efficiency of Λ(Anti-Λ)-Hyperons at the SPD SPD中Λ（反-Λ）-超子重构效率的研究
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701122
D. A. Gubachev
{"title":"Study of the Reconstruction Efficiency of Λ(Anti-Λ)-Hyperons at the SPD","authors":"D. A. Gubachev","doi":"10.1134/S1547477125701122","DOIUrl":"10.1134/S1547477125701122","url":null,"abstract":"<p>The Spin Physics Detector (SPD) experiment at the Nuclotron-based Ion Collider fAcility (NICA) is an upcoming project with an extensive physics program aimed at studying the spin structure of the nucleons. The experiment will record data from the collisions of polarized proton and deuteron beams. One of the important particles produced in such collisions is the <span>(Lambda )</span>-hyperon. It is noteworthy because it has already been studied in detail and its polarization can provide information about parton distribution functions of beam particle. At the present stage of the experiment, one of the main tasks is to study the detection of the particles of interest produced in the collisions at the SPD and to optimize the parameters for their selections. This work presents the results of the calculations of detection efficiencies of the <span>(Lambda )</span> and anti-<span>(Lambda )</span> hyperons.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1065 - 1069"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210450","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
Direct Photon Interferometry in Bi–Bi Collision at (sqrt {{{s}_{{NN}}}} ) = 9.2 GeV (sqrt {{{s}_{{NN}}}} ) = 9.2 GeV下Bi-Bi碰撞的直接光子干涉测量
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701109
V. A. Kuskov, D. Yu. Peresun’ko, D. S. Blau
{"title":"Direct Photon Interferometry in Bi–Bi Collision at (sqrt {{{s}_{{NN}}}} ) = 9.2 GeV","authors":"V. A. Kuskov,&nbsp;D. Yu. Peresun’ko,&nbsp;D. S. Blau","doi":"10.1134/S1547477125701109","DOIUrl":"10.1134/S1547477125701109","url":null,"abstract":"<p>We consider Bose–Einstein correlations of direct photons in central Bi–Bi collisions at <span>(sqrt {{{s}_{{NN}}}} )</span> = 9.2 GeV. Two-photon correlations are calculated in UrQMD hybrid model. Two equations of state, one with the first-order QCD phase transition and the other with the pure hadron gas, are considered to study the effects of the formation of quark-gluon plasma (QGP) and mixed phase on the observables. The extracted correlation radii in out-side-long parametrization demonstrate significant increasing in outward and longitudinal directions for the scenario including QGP, while correlations in side direction are not sensitive to the equation of the state.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1058 - 1061"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210490","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
Structural Reorganization in Collapsed Langmuir Monolayers 塌缩Langmuir单层的结构重组
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125701201
L. R. Muftakhova, K. V. Nikolaev, A. V. Rogachev, N. N. Novikova, B. I. Ostrovskii, S. N. Yakunin
{"title":"Structural Reorganization in Collapsed Langmuir Monolayers","authors":"L. R. Muftakhova,&nbsp;K. V. Nikolaev,&nbsp;A. V. Rogachev,&nbsp;N. N. Novikova,&nbsp;B. I. Ostrovskii,&nbsp;S. N. Yakunin","doi":"10.1134/S1547477125701201","DOIUrl":"10.1134/S1547477125701201","url":null,"abstract":"<p>Arachidic acid monolayers formed on an aqueous solution of cerium nitrate have been studied by grazing incidence X-ray diffraction. Despite compression beyond the collapse point, the monolayer unexpectedly retains its translational order and develops corrugation. This paper presents a method for simulating the two-dimensional diffraction patterns characteristic of monolayers with perturbed orientational order. The unusual diffraction data obtained from corrugated monolayers during synchrotron experiments are described using this approach.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1099 - 1101"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210768","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
Pion in the Bethe-Salpeter Approach with Separable Kernel 具有可分离核的Bethe-Salpeter方法中的介子
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-10-03 DOI: 10.1134/S1547477125700943
S. G. Bondarenko, M. K. Slautin
{"title":"Pion in the Bethe-Salpeter Approach with Separable Kernel","authors":"S. G. Bondarenko,&nbsp;M. K. Slautin","doi":"10.1134/S1547477125700943","DOIUrl":"10.1134/S1547477125700943","url":null,"abstract":"<p>In the paper, the static and dynamic properties of the pion in the Bethe-Salpeter approach are considered. The rank-one separable kernel of the quark-antiquark interaction is used to solve the equation analytically. Multidimensional integrals describing pion properties are calculated by several numerical methods and compared with previous papers. An error in the calculation of the interaction part of the elastic pion form factor is found. Using the corrected results, the kernel parameters are refitted. The calculated static properties as well as transition and elastic form factors are presented in comparison with the recent experimental data.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 5","pages":"1000 - 1004"},"PeriodicalIF":0.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210776","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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