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57 results on '"N P, Krasnikov"'

1. First constraints on the L μ − L τ explanation of the muon g-2 anomaly from NA64-e at CERN

Author

Yu. M. Andreev, A. Antonov, D. Banerjee, B. Banto Oberhauser, J. Bernhard, P. Bisio, A. Celentano, N. Charitonidis, D. Cooke, P. Crivelli, E. Depero, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik, V. N. Frolov, A. Gardikiotis, S. V. Gertsenberger, S. Girod, S. N. Gninenko, M. Hösgen, V. A. Kachanov, Y. Kambar, A. E. Karneyeu, E. A. Kasianova, G. Kekelidze, B. Ketzer, D. V. Kirpichnikov, M. M. Kirsanov, V. N. Kolosov, V. A. Kramarenko, L. V. Kravchuk, N. V. Krasnikov, S. V. Kuleshov, V. E. Lyubovitskij, V. Lysan, A. Marini, L. Marsicano, V. A. Matveev, R. Mena Fredes, R. Mena Yanssen, L. Molina Bueno, M. Mongillo, D. V. Peshekhonov, V. A. Polyakov, B. Radics, K. Salamatin, V. D. Samoylenko, H. Sieber, D. Shchukin, O. Soto, V. O. Tikhomirov, I. Tlisova, A. N. Toropin, M. Tuzi, P. Ulloa, P. V. Volkov, V. Yu. Volkov, I. V. Voronchikhin, J. Zamora-Saá, and A. S. Zhevlakov

Subjects
Beyond Standard Model, Fixed Target Experiments, Dark Matter, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The inclusion of an additional U(1) gauge L μ − L τ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this paradigm assumes the existence of a new, light Z′ vector boson, with dominant coupling to μ and τ leptons and interacting with electrons via a loop mechanism. The L μ − L τ model can also explain the Dark Matter relic abundance, by assuming that the Z′ boson acts as a “portal” to a new Dark Sector of particles in Nature, not charged under known interactions. In this work we present the results of the Z′ search performed by the NA64-e experiment at CERN SPS, that collected ~ 9 × 1011 100 GeV electrons impinging on an active thick target. Despite the suppressed Z′ production yield with an electron beam, NA64-e provides the first accelerator-based results excluding the g − 2 preferred band of the Z′ parameter space in the 1 keV < m Z ′ $$ {m}_{Z^{\prime }} $$ ≲ 2 MeV range, in complementarity with the limits recently obtained by the NA64-μ experiment with a muon beam.

Published
2024
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2. Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel

Author

C. Cazzaniga, P. Odagiu, E. Depero, L. Molina Bueno, Yu. M. Andreev, D. Banerjee, J. Bernhard, V. E. Burtsev, N. Charitonidis, A. G. Chumakov, D. Cooke, P. Crivelli, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik, A. Feshchenko, V. N. Frolov, A. Gardikiotis, S. G. Gerassimov, S. Girod, S. N. Gninenko, M. Hösgen, V. A. Kachanov, A. E. Karneyeu, G. Kekelidze, B. Ketzer, D. V. Kirpichnikov, M. M. Kirsanov, V. N. Kolosov, I. V. Konorov, S. G. Kovalenko, V. A. Kramarenko, L. V. Kravchuk, N. V. Krasnikov, S. V. Kuleshov, V. E. Lyubovitskij, V. Lysan, V. A. Matveev, Yu. V. Mikhailov, D. V. Peshekhonov, V. A. Polyakov, B. Radics, R. Rojas, A. Rubbia, V. D. Samoylenko, D. Shchukin, H. Sieber, V. O. Tikhomirov, I. V. Tlisova, D. A. Tlisov, A. N. Toropin, A. Yu. Trifonov, B. I. Vasilishin, G. Vasquez Arenas, P. V. Volkov, V. Yu. Volkov, P. Ulloa, and NA64 Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We report the results of a search for a new vector boson ( $$ A'$$ A ′ ) decaying into two dark matter particles $$\chi _1 \chi _2$$ χ 1 χ 2 of different mass. The heavier $$\chi _2$$ χ 2 particle subsequently decays to $$\chi _1$$ χ 1 and an off-shell Dark Photon $$ A'^* \rightarrow e^+e^-$$ A ′ ∗ → e + e - . For a sufficiently large mass splitting, this model can explain in terms of new physics the recently confirmed discrepancy observed in the muon anomalous magnetic moment at Fermilab. Remarkably, it also predicts the observed yield of thermal dark matter relic abundance. A detailed Monte-Carlo simulation was used to determine the signal yield and detection efficiency for this channel in the NA64 setup. The results were obtained re-analyzing the previous NA64 searches for an invisible decay $$A'\rightarrow \chi \overline{\chi }$$ A ′ → χ χ ¯ and axion-like or pseudo-scalar particles $$a \rightarrow \gamma \gamma $$ a → γ γ . With this method, we exclude a significant portion of the parameter space justifying the muon g-2 anomaly and being compatible with the observed dark matter relic density for $$A'$$ A ′ masses from 2 $$m_e$$ m e up to 390 MeV and mixing parameter $$\varepsilon $$ ε between $$3\times 10^{-5}$$ 3 × 10 - 5 and $$2\times 10^{-2}$$ 2 × 10 - 2 .

Published
2021
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3. Hunting down the X17 boson at the CERN SPS

Author

NA64 Collaboration, E. Depero, Yu. M. Andreev, D. Banerjee, J. Bernhard, V. E. Burtsev, N. Charitonidis, A. G. Chumakov, D. Cooke, P. Crivelli, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik, A. Feshchenko, V. N. Frolov, A. Gardikiotis, S. G. Gerassimov, S. Girod, S. N. Gninenko, M. Hösgen, V. A. Kachanov, A. E. Karneyeu, G. Kekelidze, B. Ketzer, D. V. Kirpichnikov, M. M. Kirsanov, V. N. Kolosov, I. V. Konorov, S. G. Kovalenko, V. A. Kramarenko, L. V. Kravchuk, N. V. Krasnikov, S. V. Kuleshov, V. E. Lyubovitskij, V. Lysan, V. A. Matveev, Yu. V. Mikhailov, L. Molina Bueno, D. V. Peshekhonov, V. A. Polyakov, B. Radics, R. Rojas, A. Rubbia, V. D. Samoylenko, D. Shchukin, H. Sieber, V. O. Tikhomirov, vI. Tlisova, D. A. Tlisov, A. N. Toropin, A. Yu. Trifonov, B. I. Vasilishin, G. Vasquez Arenas, P. V. Volkov, V. Yu. Volkov, and P. Ulloa

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Recently, the ATOMKI experiment has reported new evidence for the excess of $$e^+e^-$$ e + e - events with a mass $$\sim $$ ∼ 17 MeV in the nuclear transitions of $$^4$$ 4 He, that they previously observed in measurements with $$^8$$ 8 Be. These observations could be explained by the existence of a new vector $$X17$$ X 17 boson. So far, the search for the decay $$X17 \rightarrow e^+ e^-$$ X 17 → e + e - with the NA64 experiment at the CERN SPS gave negative results. Here, we present a new technique that could be implemented in NA64 aiming to improve the sensitivity and to cover the remaining $$X17$$ X 17 parameter space. If a signal-like event is detected, an unambiguous observation is achieved by reconstructing the invariant mass of the $$X17$$ X 17 decay with the proposed method. To reach this goal an optimization of the $$X17$$ X 17 production target, as well as an efficient and accurate reconstruction of two close decay tracks, is required. A dedicated analysis of the available experimental data making use of the trackers information is presented. This method provides independent confirmation of the NA64 published results [1], validating the tracking procedure. The detailed Monte Carlo study of the proposed setup and the background estimate show that the goal of the proposed search is feasible.

Published
2020
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4. Acute adrenaline myocardial necrosis prevention by artificial lung ventilation in experimental settings

Author

S. A. Sisakyan, N. F. Krasnikov, A. S. Sisakyan, A. B. Semerdzhyan, and V. A. Oganyan

Subjects
catecholamines, toxic doses, negative effect, heart function, artificial lung ventilation, positive role, Diseases of the circulatory (Cardiovascular) system, RC666-701
Abstract

In experimental settings, hystotoxic catecholamine doses depress cardiomyocyte contractility, induce arrhythmia, and heart arrest. Edema and hemorrhages in lung tissue and myocardium, myocardial hemomicrocirculation disturbances, significantly disturbed CO2, O2 partial pressure, and blood pH, plus increased acidosis are observed. Artificial lung ventilation (ALV) prevents fibrillation and heart arrest, edema and generalized lung hemorrhages after lethal catecholamine dose infusion. In addition, ALV prevents hypercapnia, acidosis, and increases blood oxygenation.

Published
2007

5. First constraints on the Lμ− Lτ explanation of the muon g-2 anomaly from NA64-e at CERN

Author

Andreev, Yu. M., Antonov, A., Banerjee, D., Banto Oberhauser, B., Bernhard, J., Bisio, P., Celentano, A., Charitonidis, N., Cooke, D., Crivelli, P., Depero, E., Dermenev, A. V., Donskov, S. V., Dusaev, R. R., Enik, T., Frolov, V. N., Gardikiotis, A., Gertsenberger, S. V., Girod, S., Gninenko, S. N., Hösgen, M., Kachanov, V. A., Kambar, Y., Karneyeu, A. E., Kasianova, E. A., Kekelidze, G., Ketzer, B., Kirpichnikov, D. V., Kirsanov, M. M., Kolosov, V. N., Kramarenko, V. A., Kravchuk, L. V., Krasnikov, N. V., Kuleshov, S. V., Lyubovitskij, V. E., Lysan, V., Marini, A., Marsicano, L., Matveev, V. A., Mena Fredes, R., Mena Yanssen, R., Molina Bueno, L., Mongillo, M., Peshekhonov, D. V., Polyakov, V. A., Radics, B., Salamatin, K., Samoylenko, V. D., Sieber, H., Shchukin, D., Soto, O., Tikhomirov, V. O., Tlisova, I., Toropin, A. N., Tuzi, M., Ulloa, P., Volkov, P. V., Volkov, V. Yu., Voronchikhin, I. V., Zamora-Saá, J., and Zhevlakov, A. S.

Published
2024
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9. [Use of gas mixtures with a high oxygen and CO2 content for normalizing external respiratory function and the blood acid-base state in muscle fatigue]

Author

N A, Agadzhanian, N P, Krasnikov, and S I, Naĭdich

Subjects
Acid-Base Equilibrium, Male, Oxygen, Respiratory Therapy, Oxygen Consumption, Time Factors, Adolescent, Partial Pressure, Respiration, Physical Exertion, Humans, Carbon Dioxide, Fatigue
Abstract

Use of gas mixtures containing 1% CO2+ +35% O2 and 35% O2 in the air during a passive rest after a high workload led to the neutralization of acid metabolites and recovery of acid-base equilibrium due to a greater oxygen consumption, retention of metabolic CO2 in plasma, and accumulation of endogenous CO2 in body fluids.

Published
1986

14. [Effect of physical training on the manifestation of reactions to breathing a gas mixture containing 5% CO2 and 14% O2]

Author

N P, Krasnikov

Subjects
Adult, Hypercapnia, Male, Oxygen, Physical Education and Training, Adolescent, Dose-Response Relationship, Drug, Physical Fitness, Respiration, Humans, Carbon Dioxide, Hypoxia
Abstract

The effect of a hypoxic-hypercapnic gas mixture (5% CO2 + 14% O2) on the exercising man was studied. At a low work load inhalation of this gas mixture inhibited gas exchange, and after 10 month training stimulated it. Thus, increase in physical endurance was followed by increase in human resistance to O2 deficiency and CO2 excess in the breathing mixture.

Published
1981

16. Politics of Representation-Normativity in Museum Practice.

Author

Luepken, Anja

Subjects
MUSEUMS, RELIGIOUS institutions, TEMPLES, RELIGION, ETHICS
Abstract

This article explores the relevance of normativity for the critical term 'museality.' The normative structures that become visible in museum practice are outlined in connection with the practice of appropriation. The relations between museum practice and the ruling paradigm of incumbent political systems are shown as strategies of legitimization. An additional focus is laid on the blurred boundaries between museums and temples. Finally, the 'ethization' of museums in recent decades is discussed. It is shown that normativity is a central aspect of museality, being correlated to all its facets. [ABSTRACT FROM AUTHOR]

Published
2011
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22. Mitocentricity

Author

Zorov, Dmitry B., Abramicheva, Polina A., Andrianova, Nadezda V., Babenko, Valentina A., Zorova, Ljubava D., Zorov, Savva D., Pevzner, Irina B., Popkov, Vasily A., Semenovich, Dmitry S., Yakupova, Elmira I., Silachev, Denis N., Plotnikov, Egor Y., and Sukhikh, Gennady T.

Published
2024
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23. The Russian Orthodox Church : A Contemporary History

Author

Jane Ellis and Jane Ellis

Subjects
BX492
Abstract

The Russian Orthodox Church (1986) concentrates on the recent history of the church, examining the situation of Russian Orthodox believers in the Soviet Union. It demonstrates that freedom of religion did not exist in the Soviet Union, although the church remained a vigorous and potent force in Soviet society which the authorities were unable to ignore.

Published
2024

31. Museums of World Religions : Displaying the Divine, Shaping Cultures

Author

Charles Orzech and Charles Orzech

Subjects
Religious articles--Museums, Religion--Exhibitions, Museums--Religious aspects, Religion--Museums, Religions--Museums
Abstract

Critically examining the notion of'world religions', Charles D. Orzech compares five purpose-built museums of world religions and their online extensions. Inspired by the 19th and 20th century discipline of comparative religion, these museums seek to promote religious tolerance by representing religious diversity and by arguing for underlying kinship among religions. From locations in Europe (Marburg, Glasgow and St Petersburg), to North America (Quebec) to Asia (Taipei), each museum advances a particular cultural history. This book shows how the curation of the objects they contain shapes public perceptions of religion, giving material form to the discourses about religion and world religions.Raising important questions about religion and secularity, museum displays and religious piety, Museums of World Religions questions the ideology that informs these museums. Building on recent anthropological work on the agency of religious objects, the author critiques these museums and suggests new approaches to displaying the matter of religion.

Published
2020

35. Religions in World- and Global History : A View From the German-language Discussion

Author

Nolte, Hans-Heinrich and Nolte, Hans-Heinrich

Subjects
Religious pluralism--History, Religions--History, World history, Globalization--Religious aspects
Abstract

The author argues that religious history is underestimated in its importance for World- and Global history. The history of religions is quite often an established sub-discipline within convincing research traditions. In order to reconstruct the past adequately, historians need academically controlled data about the beliefs of the people they are dealing with. This book offers ten examples from a wide range of religious beliefs which show that developments in religion have far reaching consequences for general history – in the change from Empire to the system of European nations, in establishing social disciplines as part of capitalist societies, in attempts of semi-peripheral states struggling for a place in the European World-System, in defence of Muslim societies on the peripheries and in postcolonial Africa.

Published
2015

36. Archives in Russia: A Directory and Bibliographic Guide to Holdings in Moscow and St.Petersburg : A Directory and Bibliographic Guide to Holdings in Moscow and St.Petersburg

Author

Patricia Kennedy Grimsted, Patricia Kennedy Grimstead, Patricia Kennedy Grimsted, and Patricia Kennedy Grimstead

Subjects
Archives--Directories.--Russia (Federation) --
Abstract

This is a comprehensive directory and bibliographic guide to Russian archives and manuscript repositories in the capital cities of Moscow and St. Petersburg. It is an essential resource for any researcher interested in Russian sources for topics in diplomatic, military, and church history; art; dance; film; literature; science; ethnolography; and geography. The first part lists general bibliographies of relevant reference literature, directories, bibliographic works, and specialized subject-related sources. In the following sections of the directory, archival listings are grouped in institutional categories. Coverage includes federal, ministerial, agency, presidential, local, university, Academy of Sciences, organizational, library, and museum holdings. Individual entries include the name of the repository (in Russian and English), basic information on location, staffing, institutional history, holdings, access, and finding aids.More comprehensive and up-to-date than the 1997 Russian Version, this edition includes Web-site information, dozens of additional repositories, several hundred more bibliographical entries, coverage of reorganization issues, four indexes, and a glossary.

Published
2015

48. Women in the Khrushchev Era

Author

M. Ilic, S. Reid, L. Attwood, M. Ilic, S. Reid, and L. Attwood

Subjects
Women--Soviet Union--Social conditions--Congresses, Women--Soviet Union--Economic conditions--Congresses, Women and communism--Soviet Union--History--Congresses
Abstract

This collection of essays examines women in the Khrushchev era, using both newly-accessible archival material and a re-reading of published sources. Exploring diverse subjects including housing, space flight, women workers, cinema, religion and consumption, the volume places the analysis of specific events or issues within a broader discussion of economic, political, ideological and international developments to provide a full analysis of the era.

Published
2004

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