A. G. Kharlamov, T. A. Kharlamova, A. S. Kupich, V. N. Zhabin
{"title":"Studying the Z Boson Decay into the Lepton Pair and Photon with the Data from the ATLAS Detector at the Large Hadron Collider","authors":"A. G. Kharlamov, T. A. Kharlamova, A. S. Kupich, V. N. Zhabin","doi":"10.1134/S1063779624702289","DOIUrl":"10.1134/S1063779624702289","url":null,"abstract":"<p>In this paper, we present the study of the <i>Z</i>-boson decay into two leptons and photon with world best accuracy. The systematic uncertainties for measured differential distributions do not exceed 0.6%. In general, the predictions of the latest versions of modern generators PowHeg + PHOTOS, Sherpa 2.2.4 and KKMChh describe the experimental data well, at the same time, small deviations are present near the phase volume boundaries: 20 < <i>M</i><sub><i>ll</i></sub> < 45 GeV, ∆<i>R</i><sub><i>l</i>γ</sub> ≈ 2.5, <i>M</i><sub><i>l</i>γ</sub> ≈ 80 GeV. The significance of the deviation at <i>M</i><sub><i>l</i>γ</sub> ≈ 80 GeV exceeds 3σ.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"777 - 783"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Seesaw Mechanism and Dark Matter in a Model with SU(2)L × SU(2)R Symmetry","authors":"M. N. Dubinin, E. Yu. Fedotova, D. M. Kazarkin","doi":"10.1134/S1063779624702435","DOIUrl":"10.1134/S1063779624702435","url":null,"abstract":"<p>The minimal model <span>(SU{{(2)}_{L}} times SU{{(2)}_{R}} times U(1))</span> with the left-right symmetry at an energy scale of the order of 10 TeV is considered. A three-stage scheme of symmetry breaking of the model up to the standard gauge group is considered, and phenomenologically satisfactory parametric scenarios for the mass spectrum of additional gauge bosons and Higgs bosons are identified. The model contains stable neutral fermions—candidates for the role of dark matter. Parametric scenarios of the Higgs sector of the model have been obtained, which can be consistent with the main phenomenological limitations of experiments on colliders and the main cosmological observables.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"871 - 876"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Calibrating the New Near SuperFGD Neutrino Detector for T2K Experiment","authors":"A. A. Chvirova, M. A. Kolupanova, A. V. Mefodiev","doi":"10.1134/S1063779624702368","DOIUrl":"10.1134/S1063779624702368","url":null,"abstract":"<p>The highly segmented neutrino 3D detector SuperFGD is the core of the near neutrino detector complex ND280 in T2K experiment. This detector is a key element to search for violating CP-symmetry in the lepton sector in T2K and Hyper-Kamiokande experiments. We report on the results of calibrating multipixel photon counters (MPPC). We also provide the values obtained for attenuation parameters of the light signal propagating through horizontal WLS fibers.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"827 - 830"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Gao, J. Shang Guan, Y. Zhang, M. Li, K. Yan, D. Gao
{"title":"Design of a High Voltage Charging Power Supply for HIAF-Kicker System","authors":"J. Gao, J. Shang Guan, Y. Zhang, M. Li, K. Yan, D. Gao","doi":"10.1134/S1063779624701946","DOIUrl":"10.1134/S1063779624701946","url":null,"abstract":"<p>In the realm of particle accelerators, high-voltage charging power supplies are indispensable for the operation of kicker systems, particularly within the context of high-precision spectrometers and Booster Ring integral to the High Intensity heavy-ion Accelerator Facility under development in Huizhou, China. The exigencies of such applications demand high-voltage charging power supplies that exhibit exceptional precision and stability, attributes that are not met by conventional power supply technologies. In response to this challenge, a novel high-voltage charging power supply has been engineered, grounded in a full-bridge series LC resonant circuit topology. This design leverages high-precision components with minimal temperature drift and employs a segmented charging strategy to further refine performance characteristics. The innovative approach extends to a modular design framework, which not only condenses the production timeline and associated costs but also bolsters the reliability and serviceability of the power supply. Empirical testing has confirmed the capability of this high-voltage charging power supply to deliver voltage outputs reaching 80 kV with an accuracy and stability threshold of less than 0.1%. Demonstrated through synergistic operation with a rapid injection kicker power supply prototype, the system maintains stable performance at a 3 Hz operational frequency over sustained periods. The successful validation of this high-voltage charging power supply paves the way for its integration into the heavy-ion accelerator facility post mass production, promising a significant enhancement in the operational capabilities of high-precision spectrometers within the domain of particle acceleration science.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"549 - 557"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. M. Budnev, I. I. Astapov, P. A. Bezyazykov, A. V. Blinov, E. A. Bonvech, A. N. Borodin, A. V. Bulan, P. V. Volkov, P. A. Volchugov, D. M. Voronin, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, O. A. Gres, T. I. Gres, E. O. Gres, A. A. Grinyuk, A. N. Dyachok, D. P. Zhurov, A. V. Zagorodnikov, V. Zirakashvili, A. D. Ivanova, A. L. Ivanova, M. A. Ilyushin, N. N. Kalmykov, V. V. Kindin, S. N. Kiryukhin, V. A. Kozhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. Chiavassa, M. V. Lavrova, A. A. Lagutin, Yu. E. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, A. Lukanov, S. D. Malakhov, R. R. Mirgazov, R. D. Monkhoev, E. A. Okuneva, E. A. Osipova, A. Pan, A. D. Panov, L. V. Pankov, A. L. Pakhorukov, A. A. Petrukhin, D. A. Podgrudkov, I. Poddubny, E. G. Popova, E. B. Postnikov, V. V. Prosin, A. A. Pushnin, R. I. Raikin, A. V. Razumov, G. I. Rubtsov, E. V. Ryabov, I. Satyshev, V. S. Samoliga, L. G. Sveshnikova, A. Yu. Sidorenkov, A. A. Silaev, A. A. Silaev Jr., A. V. Skurikhin, A. V. Sokolov, V. A. Tabolenko, A. B. Tanaev, M. Yu. Ternovoy, L. G. Tkachev, N. A. Ushakov, D. V. Chernov, A. Shaikovsky, I. I. Yashin
{"title":"TAIGA-1 Hybrid Complex: The Progress from Cosmic Ray Physics to Gamma Astronomy","authors":"N. M. Budnev, I. I. Astapov, P. A. Bezyazykov, A. V. Blinov, E. A. Bonvech, A. N. Borodin, A. V. Bulan, P. V. Volkov, P. A. Volchugov, D. M. Voronin, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, O. A. Gres, T. I. Gres, E. O. Gres, A. A. Grinyuk, A. N. Dyachok, D. P. Zhurov, A. V. Zagorodnikov, V. Zirakashvili, A. D. Ivanova, A. L. Ivanova, M. A. Ilyushin, N. N. Kalmykov, V. V. Kindin, S. N. Kiryukhin, V. A. Kozhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. Chiavassa, M. V. Lavrova, A. A. Lagutin, Yu. E. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, A. Lukanov, S. D. Malakhov, R. R. Mirgazov, R. D. Monkhoev, E. A. Okuneva, E. A. Osipova, A. Pan, A. D. Panov, L. V. Pankov, A. L. Pakhorukov, A. A. Petrukhin, D. A. Podgrudkov, I. Poddubny, E. G. Popova, E. B. Postnikov, V. V. Prosin, A. A. Pushnin, R. I. Raikin, A. V. Razumov, G. I. Rubtsov, E. V. Ryabov, I. Satyshev, V. S. Samoliga, L. G. Sveshnikova, A. Yu. Sidorenkov, A. A. Silaev, A. A. Silaev Jr., A. V. Skurikhin, A. V. Sokolov, V. A. Tabolenko, A. B. Tanaev, M. Yu. Ternovoy, L. G. Tkachev, N. A. Ushakov, D. V. Chernov, A. Shaikovsky, I. I. Yashin","doi":"10.1134/S1063779624701995","DOIUrl":"10.1134/S1063779624701995","url":null,"abstract":"<p>The research project reveals the advantages and capabilities of the hybrid complex of TAIGA-1 installations used to study comic ray fluxes having energies ranging from 0.1 to 1000 PeV and gamma quanta with energies from 3 TeV to a hundred TeV. We also review the results obtained and discuss the plans to upgrade the TAIGA complex.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"604 - 611"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. R. Gabdrakhmanov, N. A. Gramotkov, A. V. Kotikov, O. V. Teryaev, D. A. Volkova, I. A. Zemlyakov
{"title":"On Bjorken Sum Rule with Analytic Coupling for Low Q2","authors":"I. R. Gabdrakhmanov, N. A. Gramotkov, A. V. Kotikov, O. V. Teryaev, D. A. Volkova, I. A. Zemlyakov","doi":"10.1134/S1063779624702186","DOIUrl":"10.1134/S1063779624702186","url":null,"abstract":"<p>We present the results of [1], where good agreement was obtained between analytical calculations within the framework of QCD and experimental data on polarized Bjorken sum rule. The photoproduction limit was also considered, and a new representation of the perturbative contribution to the polarized Bjorken sum rule was obtained.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"715 - 720"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the Quantization of Scalar and Spinor Fields in the Schwarzschild Space-Time","authors":"V. O. Egorov, M. N. Smolyakov, I. P. Volobuev","doi":"10.1134/S1063779624702174","DOIUrl":"10.1134/S1063779624702174","url":null,"abstract":"<p>It is shown that a consistent procedure of canonical quantization of real scalar and spinor fields can be carried out without taking into account the interior of the Schwarzschild black hole, so that in the resulting theories the canonical (anti)commutation relations are satisfied exactly, and the Hamiltonians have the standard form. The spectra of states with energies both greater and smaller than the field mass turn out to be continuous. An interesting property of the resulting theories has been revealed: a doubling of the number of quantum states with energies greater than the field mass, which is a consequence of the topological structure of the Schwarzschild space-time.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"709 - 714"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the Possible Detection of New Particles as Candidates for the Role of Dark Matter Particles","authors":"A. T. D’yachenko","doi":"10.1134/S1063779624702277","DOIUrl":"10.1134/S1063779624702277","url":null,"abstract":"<p>It is proposed to improve the agreement with experimental data in comparison with the previous works for the soft photon spectrum as a function of the transverse momentum in <span>(pp)</span> collisions with an incident proton momentum of 450 GeV/<span>(c)</span> in order to clearly isolate the signal on the detection of the X17 boson. An interpretation has been proposed for the detection of a boson with a mass of 38 MeV in the spectra of photons emitted in reactions of protons with carbon nuclei at an incident proton momentum of 5.5 GeV/<span>(c)</span>.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"772 - 776"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of the Higgs Potential Renormalization Group Flow","authors":"M. V. Elisov, M. V. Dolgopolov","doi":"10.1134/S1063779624702198","DOIUrl":"10.1134/S1063779624702198","url":null,"abstract":"<p>In this paper, critical points are investigated as characteristics of the asymptotic behavior of induced transitions and the evolution of the surface of extrema of effective Higgs potentials to evaluate several characteristics, for example, asymptotic stability in the case of the given parameters. Critical phenomena in evolution of the surface of extrema of the Higgs potential in a system with two doublets of complex fields are evaluated. A study of renormalization group of coupling flows of the effective expansion potential of the Higgs sector of the Standard Model has been performed. The asymptotic behavior of couplings and characteristics of critical points are determined, and the plots for self-interaction couplings in phase spaces are constructed. The results manifest the existence of stable nontrivial fixed points, indicating asymptotically the <span>(O)</span>(2) symmetry in the IR case. The point (0,0) turns out to be stable, since the theory reduces to a fixed point of the free field of the scalar theory. By tuning, we can obtain a wide range of energies in which fixed points determine the behavior of the theory.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"721 - 727"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Digital Signal Processing Models for the ECAL of the MPD/NICA Experiment","authors":"R. Adhikary, V. M. Baryshnikov","doi":"10.1134/S1063779624702150","DOIUrl":"10.1134/S1063779624702150","url":null,"abstract":"<p>The large-scale electromagnetic calorimeter (ECal) of the MPD experiment is being developed in the NICA complex to precisely measure spatial and energy parameters for photons and electrons. To increase the accuracy of signal measurements, the ADC64ECal analog-to-digital converter waveforms were approximated using two functions: the Novosibirsk function, also used in the BM@N experiment, and the sum of three exponents having parameters calculated through fast ESPRIT (Estimation of Signal Parameters via Rotational Invariance Techniques) method. We compare the approximation accuracy for the two functions using the <i>R</i><sup>2</sup> criterion and energy resolution in the low-energy domain.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"698 - 703"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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