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230 results on '"Starkov, N. I."'

3. Directional Sensitivity of the NEWSdm Experiment to Cosmic Ray Boosted Dark Matter

Author

Agafonova, N. Y., Alexandrov, A., Anokhina, A. M., Asada, T., Ashikhmin, V. V, Boccia, V., Centanni, D., Chernyavskii, M. M., D'Ambrosio, N., De Lellis, G., Di Crescenzo, A., Dowdy, Y. C., Dmitrievski, S., Enikeev, R. I., Galati, G., Galkin, V. I., Golovatiuk, A., Gorbunov, S. A., Gornushkin, Y., Guler, A. M., Gulyaeva, V. V., Iuliano, A., Khalikov, E. V., Kim, S. H., Konovalova, N. S., Krasilnikova, Y. O., Lauria, A., Lee, K. Y., Loschiavo, V. P., Managadze, A. K., Miloi, A., Montesi, M. C., Naka, T., Okateva, N. M., Park, B. D, Podgrudkov, D. A., Polukhina, N. G., Roganova, T. M., Rosa, G., Samoilov, M. A., Sadykov, Z. T., Saeki, K., Sato, O., Shakiryanova, I. R., Shchedrina, T. V., Shiraishi, T., Sohn, J. Y., Sotnikov, A., Starkov, N. I., Starkova, E. N., Strekalina, D. M., Tioukov, V., Ursov, E. D., Ustyuzhanin, A., Vasina, S., Voronkov, R. A., and Yoon, C. S.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present a study of a directional search for Dark Matter boosted forward when scattered by cosmic-ray nuclei, using a module of the NEWSdm experiment. The boosted Dark Matter flux at the edge of the Earth's atmosphere is expected to be pointing to the Galactic Center, with a flux 15 to 20 times larger than in the transverse direction. The module of the NEWSdm experiment consists of a 10 kg stack of Nano Imaging Trackers, i.e.~newly developed nuclear emulsions with AgBr crystal sizes down to a few tens of nanometers. The module is installed on an equatorial telescope. The relatively long recoil tracks induced by boosted Dark Matter, combined with the nanometric granularity of the emulsion, result in an extremely low background. This makes an installation at the INFN Gran Sasso laboratory, both on the surface and underground, viable. A comparison between the two locations is made. The angular distribution of nuclear recoils induced by boosted Dark Matter in the emulsion films at the surface laboratory is expected to show an excess with a factor of 3.5 in the direction of the Galactic Center. This excess allows for a Dark Matter search with directional sensitivity. The surface laboratory configuration prevents the deterioration of the signal in the rock overburden and it emerges as the most powerful approach for a directional observation of boosted Dark Matter with high sensitivity. We show that, with this approach, a 10 kg module of the NEWSdm experiment exposed for one year at the Gran Sasso surface laboratory can probe Dark Matter masses between 1 keV/c$^2$ and 1 GeV/c$^2$ and cross-section values down to $10^{-30}$~cm$^2$ with a directional sensitive search., Comment: 15 pages, 14 figures, updated references, clarified discussion in intro section. Accepted in JCAP

Published
2023
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7. Muography of the Cave Church of the Holy Dormition Pskovo-Pechersky Monastery

Author

Alexandrov, A. B., Anokhina, A. M., Vasina, S. G., Gippius, A. A., Gorbunov, S. A., Grachev, V. M., Konovalova, N. S., Krasilnikova, Yu. O., Larionov, A. A., Managadze, A. K., Melnichenko, I. A., Okateva, N. M., Paramonov, S. S., Petrukhin, A. A., Polukhina, N. G., Roganova, T. M., Sadykov, Zh. T., Starkov, N. I., Starkova, E. N., Tioukov, V. E., Chernyavskii, M. M., Shevchenko, V. I., and Shchedrina, T. V.

Published
2023
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11. A Noninvasive Muonography-Based Method for Exploration of Cultural Heritage Objects

Author

Alexandrov, A. B., Vasina, S. G., Galkin, V. I., Gippius, A. A., Grachev, V. M., Kalinina, G. V., Konovalov, A. S., Konovalova, N. S., Korolev, P. S., Larionov, A. A., Managadze, A. K., Melnichenko, I. A., Okateva, N. M., Polukhina, N. G., Roganova, T. M., Sadykov, Zh. T., Starkov, N. I., Starkova, E. N., Tyukov, V. E., Chernyavsky, M. M., Shevchenko, V. I., and Shchedrina, T. V.

Published
2022
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18. Muon Radiography of Large Natural and Industrial Objects—A New Stage in the Nuclear Emulsion Technique

Author

Aleksandrov, A. B., Vasina, S. G., Galkin, V. I., Grachev, V. M., Konovalov, A. S., Konovalova, N. S., Korolev, P. S., Larionov, A. A., Managadze, A. K., Melnichenko, I. A., Okateva, N. M., Polukhina, N. G., Roganova, T. M., Sadykov, Zh. T., Starkov, N. I., Starkova, E. N., Tioukov, V. E., Chernyavskiy, M. M., Shevchenko, V. I., and Shchedrina, T. V.

Published
2022
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21. Search for Hidden Rooms in the Holy Trinity Danilov Monastery by the Muon Radiography Method

Author

Alexandrov, A. B., Vasina, S. G., Galkin, V. I., Goncharova, L. A., Konovalov, A. S., Konovalova, N. S., Korolev, P. S., Larionov, A. A., Melnichenko, I. A., Managadze, A. K., Okateva, N. M., Polukhina, N. G., Roganova, T. M., Sadykov, Zh. T., Starkov, N. I., Starkova, E. N., Tioukov, V. E., Chernyavsky, M. M., Shevchenko, V. I., and Shchedrina, T. V.

Published
2021
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22. Muography of Large Natural and Industrial Objects

Author

Alexandrov, A. B., Chernyavsky, M. M., Galkin, V. I., Goncharova, L. A., Grachev, V. M., Konovalov, A. S., Konovalova, N. S., Korolev, P. S., Larionov, A. A., Managadze, A. K., Melnichenko, I. A., Okateva, N. M., Polukhina, N. G., Roganova, T. M., Sadykov, Zh. T., Shchedrina, T. V., Shevchenko, V. I., Starkov, N. I., Tyukov, V. E., Starkova, E. N., and Vasina, S. G.

Published
2021
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29. Quark-diquark model for p(\bar p)-p elastic scattering at high energies

Author

Grichine, V. M., Starkov, N. I., and Zotov, N. P.

Subjects
High Energy Physics - Phenomenology, Nuclear Theory
Abstract

A model for elastic scattering of protons at high energies based on the quark-diquark representation of the proton is discussed. The predictions of the model are compared with experimental data for the differential elastic cross-sections from available databases, Comment: 4 pages, 5 figures

Published
2012
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30. Determination of the accuracy of measuring the energy of charged particles by their path lengths in nuclear emulsion

Author

Barabash, A. S., Bradnova, V. Ya., Chernyavsky, M. M., Dubinina, V. V., Egorenkova, N. P., Konovalov, S. I., Polukhina, N. G., Pozharova, E. A., Shchedrina, T. V., Smirnitsky, V. A., Starkov, N. I., So, Tan Nang, and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The path lengths of monochromatic muons emerging in the $\pi \to \mu\nu_{\mu} $ decay were measured by the coordinate method with the view to determine their energy by path length. The dispersion of muon energy measurements by this method was $ \sigma_{\mu} = (0.11 \pm 0.01)$ MeV, which corresponds to the accuracy of $ \sigma \approx 2.7%$ of the energy of a charged particle estimated by its path length in nuclear emulsion. The developed method will enable measurements of electron energies in $2\beta $ decay ($\sim 3$ MeV) to an accuracy of $ \sigma \approx 5%$., Comment: 8 pages, 6 figures

Published
2012
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31. Measurement of $\beta\beta$ Decay-Simulating Events in Nuclear Emulsion with Molybdenum Filling

Author

Ashitkov, V. D., Barabash, A. S., Bradnova, V. Ya., Ditlov, V. A., Dubinina, V. V., Egorenkova, N. P., Konovalov, S. I., Pozharova, E. A., Polukhina, N. G., Smirnitsky, V. A., Starkov, N. I., Chernyavsky, M. M., Shchedrina, T. V., and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The measurement of positron--nucleus collisions was used to estimate the possibility of suppressing background events that simulate $\beta\beta$ decay in the emulsion region adjacent to molybdenum conglomerates. The range of the escape of two relativistic particles from the interaction was found to be $ = (0.60\pm 0.03) ~\mu$m, which approximately corresponds to the grain size of developed nuclear emulsion. No correlation of the values of d with the angle between two relativistic particles was observed. It was shown that it was possible to exclude $\beta\beta$ decay background from electrons emerging in the decay of elements of naturally occurring radioactive chains. The background from $\beta$ decays of $^{90}$Sr and $^{40}$K available in emulsion around Mo conglomerates was determined by the ratio of the volume $(\sim d^3)$ to the total volume of emulsion and was found to be $1.5\cdot 10^{-2}$. It was shown that the backgrounds from $^{40}$K, $^{90}$Sr and natural radioactivity could be significantly suppressed and would not limit the sensitivity of the experiment with 1 kg $^{100}$Mo., Comment: 6 pages, 4 figures

Published
2011

32. Nuclear emulsion with molybdenum filling for observation of $\beta\beta$ decay

Author

Ashitkov, V. D., Bagulya, A. V., Barabash, A. S., Bradnova, V. Ya., Chernyavsky, M. M., Konovalov, S. I., Okat'eva, N. M., Orlova, G. I., Polukhina, N. G., Pozharova, E. A., Smirnitsky, V. A., Starkov, N. I., Vladimirov, M. S., and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The usage of nuclear emulsion with molybdenum filling for observation of $\beta\beta$ decay are shown to be possible. Estimates for 1 kg of $^{100}$Mo with zero background give the sensitivity for the $0\nu\beta\beta$ decay of $^{100}$Mo at the level of $\sim 1.5\cdot 10^{24}$ y for 1 year of measurement., Comment: 7 pages, 3 figures

Published
2010
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34. Muonography of Large Natural and Industrial Objects

Author

Abiev, A. K., Bagulya, A. V., Chernyavsky, M. M., Dimitrienko, A. A., Gadjiev, A. A., Gadjiev, M. S., Galkin, V. I., Gippius, A. A., Goncharova, L. A., Grachev, V. M., Konovalov, A. S., Konovalova, N. S., Managadze, A. K., Okateva, N. M., Polukhina, N. G., Roganova, T. M., Shchedrina, T. V., Starkov, N. I., Teymurov, A. A., Tioukov, V. E., Vasina, S. G., and Zarubin, P. I.

Published
2019
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35. Study of the Pallasite Radiation History by Track Analysis

Author

Alexeev, V. A., Bagulya, A. V., Volkov, A. E., Gippius, A. A., Goncharova, L. A., Gorbunov, S. A., Grachev, V. M., Dashkina, A. B., Kalinina, G. V., Konovalova, N. S., Okateva, N. M., Pavlova, T. A., Polukhina, N. G., Starkov, N. I., Soe, Than Naing, Chernyvsky, M. M., and Shchedrina, T. V.

Published
2019
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36. Diffractive photoproduction of meson pairs in the S\'oding model

Author

Starkov, N. I. and Zotov, N. P.

Subjects
High Energy Physics - Phenomenology
Abstract

We consider the diffractive photoproduction of $\pi^+\pi^- , K^+K^- , D^+D^-$ meson pairs with high masses and transverse momenta in the framework of the S\"oding model. The total and differential cross sections are calculated for these processes. The role of the form factors is stressed., Comment: 7 pages, 7 figures, latex; Talk at DIS 97 Workshop (Chicago, 1997)

Published
1997
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