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Photons as Probes of Deconfinement in Quark-Gluon Plasma 光子作为夸克-胶子等离子体中解构化的探针
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050576
S. N. Nedelko, A. V. Nikolskii
{"title":"Photons as Probes of Deconfinement in Quark-Gluon Plasma","authors":"S. N. Nedelko,&nbsp;A. V. Nikolskii","doi":"10.1134/S1547477123050576","DOIUrl":"10.1134/S1547477123050576","url":null,"abstract":"<p>The specific mechanism of photon production by conversion from gluons <span>(gg to gamma )</span> in the framework of the mean-field approach to the QCD vacuum is discussed. In the confinement phase, the production probability of gluons into a photon vanishes due to the random orientation of the statistical ensemble of confining vacuum fields. In contrast, the conditions of Furry theorem are violated in the deconfinement phase, as a consequence—the conversion probability of gluons is nonzero, and photon distribution has a strong angular anisotropy. Thus, the photon production in the investigated process can act as one of the important probes of transition in quark-gluon plasma to the deconfinement phase.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1153 - 1156"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088566","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
Application of Machine Learning for the Analysis of Higgs Boson Production in Association with Single Top-Quark 机器学习在分析与单顶夸克相关的希格斯玻色子产生中的应用
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050229
A. R. Didenko
{"title":"Application of Machine Learning for the Analysis of Higgs Boson Production in Association with Single Top-Quark","authors":"A. R. Didenko","doi":"10.1134/S1547477123050229","DOIUrl":"10.1134/S1547477123050229","url":null,"abstract":"<p>This work describes results of application of a neural network for the classification of the Higgs boson in association with a single top quark signal production <span>(pp to tH)</span> and the main background processes <span>(pp to tt,ttH,ttW,ttZ)</span> production at the LHC in the ATLAS experiment. The tH channel is sensitive to the sign of the tH-coupling unlike the ttH. Also, an accurate measurement of the Higgs-top coupling is sensitive to the Beyond the Standard Model physics [1, 2].</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1169 - 1172"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088578","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
Probing the Higgs-Gauge Couplings at Leptonic Colliders 在轻子对撞机上探测希格斯规范耦合
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050357
H. Hamdellou
{"title":"Probing the Higgs-Gauge Couplings at Leptonic Colliders","authors":"H. Hamdellou","doi":"10.1134/S1547477123050357","DOIUrl":"10.1134/S1547477123050357","url":null,"abstract":"<p>In this work, we investigate the Higgs-gauge couplings <span>(hVV)</span> (with <span>(V = W,Z)</span>) through different final states at leptonic colliders. In many Standard Model (SM) extensions, these couplings could be modified as <span>({{g}_{{hVV}}} = {{kappa }_{V}}g_{{hVV}}^{{SM}})</span>, either via radiative contributions or due compositeness nature of the Higgs and/or gauge bosons. We try to probe the modified Higgs-gauge couplings effects by considering three final states at leptonic colliders <span>(hnu bar {nu }{kern 1pt} ,@,250,{text{GeV}})</span>, <span>(h{{W}^{ + }}{{W}^{ - }}{kern 1pt} @,500,{text{GeV}})</span> and <span>(Z{{W}^{ + }}{{W}^{ - }}{kern 1pt} ,@,1,{text{TeV}})</span> (with <span>(h to bbar {b})</span>, <span>(Z to jj)</span> and <span>({{W}^{ - }} to {{ell }^{ - }}bar {nu })</span>), where the cross section values are compared to the SM in the case of unpolarized (<span>({{P}_{{{{e}^{ - }},{{e}^{ + }}}}} = left[ {0,0} right])</span>) and polarized beams (<span>({{P}_{{{{e}^{ - }},{{e}^{ + }}}}} = left[ { - 0.8, + 0.3} right])</span>). Although, we will explore the relevant kinematic variables distributions for these three processes to probe the Higgs gauge couplings.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"959 - 968"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088579","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
Laboratory Working Out of a Space Experiment on Gamma Spectrometry of Planetary Matter with a High-Purity Germanium Detector Using the Method of Tagged Charged Particles 利用标记带电粒子方法的高纯度锗探测器进行行星物质伽马光谱空间实验的实验室工作
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050540
M. I. Mokrousov, I. G. Mitrofanov, A. A. Anikin, D. V. Golovin, A. S. Kozyrev, M. L. Litvak, S. Y. Nikiforov, A. B. Sanin, G. N. Timoshenko, V. N. Shvetsov, E. E. Pavlik
{"title":"Laboratory Working Out of a Space Experiment on Gamma Spectrometry of Planetary Matter with a High-Purity Germanium Detector Using the Method of Tagged Charged Particles","authors":"M. I. Mokrousov,&nbsp;I. G. Mitrofanov,&nbsp;A. A. Anikin,&nbsp;D. V. Golovin,&nbsp;A. S. Kozyrev,&nbsp;M. L. Litvak,&nbsp;S. Y. Nikiforov,&nbsp;A. B. Sanin,&nbsp;G. N. Timoshenko,&nbsp;V. N. Shvetsov,&nbsp;E. E. Pavlik","doi":"10.1134/S1547477123050540","DOIUrl":"10.1134/S1547477123050540","url":null,"abstract":"<p>This article presents a description of the experiment on the Joint Institute for Nuclear Research (JINR) Phasotron proton beam for a laboratory model of a space instrument for the gamma spectrometry of celestial bodies based on the method of tagged charged particles of galactic cosmic rays. One feature of the experiment is the use of a p-type high-purity germanium semiconductor detector as part of the model.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1016 - 1029"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088597","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
Joint Fit of Long-Baseline Accelerator Neutrino Experiments in GNA Software GNA软件中长基线加速器中微子实验的联合拟合
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050692
A. V. Stepanova, L. D. Kolupaeva
{"title":"Joint Fit of Long-Baseline Accelerator Neutrino Experiments in GNA Software","authors":"A. V. Stepanova,&nbsp;L. D. Kolupaeva","doi":"10.1134/S1547477123050692","DOIUrl":"10.1134/S1547477123050692","url":null,"abstract":"<p>Long-baseline accelerator neutrino experiments are developing their neutrino data analysis in order to define the charge-parity phase <span>({{delta }_{{{text{CP}}}}})</span> and the neutrino mass ordering which are important in describing neutrino oscillations and other phenomena of elementary particle physics. Since neutrinos interact very weakly it takes a long time to collect significant event statistics. Currently working experiments, NOvA and T2K, are not able to reach <span>(5sigma )</span> significance level separately to find out the values of unknown oscillation parameters. Future long-baseline accelerator neutrino experiment DUNE will also measure these oscillation parameters. These experiments have the similar composition for neutrino observation. A unified framework in the GNA software is developed to predict single and joint sensitivities of experiments of this type. It is expected that single NOvA and T2K sensitivities to the neutrino mass ordering and the charge-parity phase are much smaller than the expected DUNE sensitivities. From the analysis of joint sensitivities the hypothesis of the charge-parity conservation (<span>({{delta }_{{{text{CP}}}}} = 0,; pm pi )</span>) is disfavored at <span>( &gt; 5sigma )</span> significance level for 60% of possible <span>({{delta }_{{{text{CP}}}}})</span> values for event rates accumulated by <span>(36 times {{10}^{{20}}})</span> POT exposure in each regime in NOvA, <span>(200 times {{10}^{{20}}})</span> POT exposure in T2K and after 7 yr of DUNE running time. DUNE sensitivities to the neutrino mass ordering after 2 yr are comparable to joint NOvA and T2K sensitivities.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1176 - 1179"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088601","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
Combined Scaling of Nanochip Generators for Betavoltaics Betavoltaics纳米芯片发生器的组合缩放
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050333
V. Gurskaya, M. V. Dolgopolov, M. V. Elisov, V. V. Radenko, S. A. Radzhapov
{"title":"Combined Scaling of Nanochip Generators for Betavoltaics","authors":"V. Gurskaya,&nbsp;M. V. Dolgopolov,&nbsp;M. V. Elisov,&nbsp;V. V. Radenko,&nbsp;S. A. Radzhapov","doi":"10.1134/S1547477123050333","DOIUrl":"10.1134/S1547477123050333","url":null,"abstract":"<p>A concept and model of a combined 4-stage scaling of semiconductor power converter chips with nanosized heterojunctions to provide maximum power is proposed. A variant of optimizing the scaling solution for a modular structure is implemented by heterojunctions with sequence variations <span>(Au(Al) - (P(N) - 3C - SiC{text{/}}p(n) - Si) - (n(p) - aGe) - Al(Au))</span> with an increase in the concentration and direction of movement of nonequilibrium carriers and further upconversion of the voltage with charge pumping.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1088 - 1093"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088604","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
Anomalous Kinetics of a Multi-Species Reaction-Diffusion System: Effect of Random Velocity Fluctuations 多物种反应扩散系统的异常动力学：随机速度波动的影响
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050370
M. Hnatič, M. Kecer, T. Lučivjanský
{"title":"Anomalous Kinetics of a Multi-Species Reaction-Diffusion System: Effect of Random Velocity Fluctuations","authors":"M. Hnatič,&nbsp;M. Kecer,&nbsp;T. Lučivjanský","doi":"10.1134/S1547477123050370","DOIUrl":"10.1134/S1547477123050370","url":null,"abstract":"<p>Reaction-diffusion systems, which consist of the reacting particles subject to diffusion process, constitute one of the common examples of non-linear statistical systems. In low space dimensions <span>(d leqslant 2)</span> the usual description by means of kinetic rate equations is not sufficient and the effect of density fluctuations has to be properly taken into account. Our aim here is to analyze a particular multi-species reaction-diffusion system characterized by two reactions <span>(A + A to (emptyset ,A),)</span> <span>(A + B to A)</span> at and below its critical dimension <span>({{d}_{c}} = 2)</span>. In particular, we investigate effect of thermal fluctuations on the reaction kinetics, which are generated by means of random velocity field modelled by a stochastic Navier–Stokes equations. Main theoretical tool employed is field-theoretic perturbative renormalization group. The analysis is performed to the first order of the perturbation scheme (one-loop approximation).</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1081 - 1083"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088606","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
Electron Energy Measurement Using Optical Transition Radiation 利用光学跃迁辐射测量电子能量
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050734
A. V. Vukolov, A. P. Potylitsyn, M. V. Shevelev, S. R. Uglov
{"title":"Electron Energy Measurement Using Optical Transition Radiation","authors":"A. V. Vukolov,&nbsp;A. P. Potylitsyn,&nbsp;M. V. Shevelev,&nbsp;S. R. Uglov","doi":"10.1134/S1547477123050734","DOIUrl":"10.1134/S1547477123050734","url":null,"abstract":"<p>An optical scheme for diagnosing moderately relativistic electron beams based on the detection of optical transition radiation (OTR) has been proposed and implemented. This scheme makes it possible to measure the beam profile, its angular divergence, and energy without resorting to splitting the OTR beam into two, but using a single optical path. A commercial CCD camera with a working field of 6 × 20 mm and a pixel size of 26 × 26 μm made it possible to measure the angular distribution of OTR and, accordingly, the electron energy with an accuracy of about 7%.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1030 - 1034"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088493","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
Gauge-Invariant Derivation of the Casimir–Lifshitz Pressure Casimir–Lifshitz压力的规范不变导数
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050527
V. N. Marachevsky, A. A. Sidelnikov
{"title":"Gauge-Invariant Derivation of the Casimir–Lifshitz Pressure","authors":"V. N. Marachevsky,&nbsp;A. A. Sidelnikov","doi":"10.1134/S1547477123050527","DOIUrl":"10.1134/S1547477123050527","url":null,"abstract":"<p>A new gauge-invariant (by construction) derivation of electric Green’s functions in a system of two dielectric half-spaces separated by a vacuum gap is considered. The derivation of Casimir–Lifshitz pressure is given. We consider a novel explicitly gauge-invariant derivation of electric Green’s functions in the system of two dielectric half-spaces separated by a vacuum slit. The derivation of the Casimir–Lifshitz pressure is given.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1114 - 1116"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088555","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
Self-Organization of Two-Dimensional Systems: The Role of Translational and Orientational Order Parameters 二维系统的自组织：平移和定向顺序参数的作用
IF 0.5
Physics of Particles and Nuclei Letters Pub Date : 2023-10-06 DOI: 10.1134/S1547477123050667
V. N. Ryzhov, E. A. Gaiduk, Yu. D. Fomin, E. N. Tsiok
{"title":"Self-Organization of Two-Dimensional Systems: The Role of Translational and Orientational Order Parameters","authors":"V. N. Ryzhov,&nbsp;E. A. Gaiduk,&nbsp;Yu. D. Fomin,&nbsp;E. N. Tsiok","doi":"10.1134/S1547477123050667","DOIUrl":"10.1134/S1547477123050667","url":null,"abstract":"<p>The article discusses modern theories of the melting of two-dimensional systems based mainly on the concepts of the Berezinskii–Kosterlitz–Thouless (BKT) theory of phase transitions in two-dimensional systems with continuous symmetries. The article provides a critical analysis of the approaches used to determine the parameters and type of transition using computer simulation methods. The methods are used to consider the melting in a system of soft disks with potential <span>( propto 1/{{r}^{{12}}})</span>.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"20 5","pages":"1124 - 1127"},"PeriodicalIF":0.5,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41088571","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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