☆ 4.8 Article

Gravitational Bose-Einstein Condensation in the Kinetic Regime

PHYSICAL REVIEW LETTERS (2018)

期刊

PHYSICAL REVIEW LETTERS

卷 121, 期 15, 页码 -

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AMER PHYSICAL SOC

DOI: 10.1103/PhysRevLett.121.151301

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Physics, Multidisciplinary

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[RSF 16-12-10494]
Russian Science Foundation [16-12-10494] Funding Source: Russian Science Foundation

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We study Bose-Einstein condensation and the formation of Bose stars in virialized dark matter halos and miniclusters by universal gravitational interactions. We prove that this phenomenon does occur and it is described by a kinetic equation. We give an expression for the condensation time. Our results suggest that Bose stars may form kinetically in mainstream dark matter models such as invisible QCD axions and fuzzy dark matter.

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S. Demidov, B. R. Farkhtdinov, D. G. Levkov

Summary: A numerical method for calculating the probabilities of multiparticle production in weakly coupled scalar theories was developed based on D.T. Son's semiclassical method of singular solutions. When applied to the process 1 -> n in the unbroken four-dimensional lambda phi(4) theory, the known results were successfully reproduced for the range 1 MUCH LESS-THAN n MUCH LESS-THAN lambda(-1).

JETP LETTERS (2021)

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Article Physics, Particles & Fields

An Effective Field Theory for large oscillons

D. G. Levkov, V. E. Maslov, E. Ya Nugaev, A. G. Panin

Summary: This article investigates the characteristics of oscillons and their effective description in models. By considering the limit of large size at finite field strength, we obtain an effective field description of these oscillons. The description possesses a global U(1) symmetry, revealing their stability and longevity.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

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Article Astronomy & Astrophysics

Analytic description of monodromy oscillons

D. G. Levkov, V. E. Maslov

Summary: This study provides a precise analytic description of oscillons in scalar field theories with nearly quadratic potentials. It introduces a method based on expanding the anharmonicity of the potential and introducing a field-dependent running mass, and computes the effective action for the oscillon profile and other parameters. Comparison with numerical simulations shows that this method is more accurate than other analytic approaches.

PHYSICAL REVIEW D (2023)

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Proceedings Paper Astronomy & Astrophysics

Telescope Array anisotropy summary

T. Fujii, D. Ivanov, C. C. H. Jui, K. Kawata, J. H. Kim, M. Yu. Kuznetsov, T. Nonaka, S. Ogio, G. I. Rubtsov, H. Sagawa, G. B. Thomson, P. G. Tinyakov, I. Tkachev, S. Troitsky

Summary: In this paper, we have summarized the recent anisotropy studies conducted by the Telescope Array collaboration. The results show variations in flux and spectrum anisotropy of UHECR at different scales.

37TH INTERNATIONAL COSMIC RAY CONFERENCE, ICRC2021 (2022)

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Article Astronomy & Astrophysics

Solar mass black holes from neutron stars and bosonic dark matter

Raghuveer Garani, Dmitry Levkov, Peter Tinyakov

Summary: Black holes with masses approximate to 1 M circle dot cannot be formed through stellar evolution, but gravitational collapse of neutron stars triggered by the accumulation of dark matter can realize this scenario. Our study demonstrates that despite the conflicting requirements on the interactions of dark matter particles, the transmutation process can be achieved in bosonic dark matter models. We show that deformations at large fields can lead to the unavoidable collapse of dark matter into a black hole in models with efficient dark matter accumulation.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Instability of rotating Bose stars

A. S. Dmitriev, D. G. Levkov, A. G. Panin, E. K. Pushnaya, I. I. Tkachev

Summary: The study explores the stability and decay of rotating Bose stars composed of light bosonic dark matter, showing that they are unstable under certain conditions and eventually decay into a Saturn-like configuration. Only in models with strong repulsive self-interactions, the Bose star with l = 1 is stable.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment

R. U. Abbasi, M. Abe, T. Abu-Zayyad, M. Allen, R. Azuma, E. Barcikowski, J. W. Belz, D. R. Bergman, S. A. Blake, R. Cady, B. G. Cheon, J. Chiba, M. Chikawa, A. di Matteo, T. Fujii, K. Fujisue, K. Fujita, R. Fujiwara, M. Fukushima, G. Furlich, W. Hanlon, M. Hayashi, N. Hayashida, K. Hibino, R. Higuchi, K. Honda, D. Ikeda, T. Inadomi, N. Inoue, T. Ishii, R. Ishimori, H. Ito, D. Ivanov, H. Iwakura, H. M. Jeong, S. Jeong, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, S. Kasami, H. Kawai, S. Kawakami, S. Kawana, K. Kawata, E. Kido, H. B. Kim, J. H. Kim, M. H. Kim, S. W. Kim, S. Kishigami, V Kuzmin, M. Kuznetsov, Y. J. Kwon, K. H. Lee, B. Lubsandorzhiev, J. P. Lundquist, K. Machida, H. Matsumiya, T. Matsuyama, J. N. Matthews, R. Mayta, M. Minamino, K. Mukai, I Myers, S. Nagataki, K. Nakai, R. Nakamura, T. Nakamura, Y. Nakamura, T. Nonaka, H. Oda, S. Ogio, M. Ohnishi, H. Ohoka, Y. Oku, T. Okuda, Y. Omura, M. Ono, R. Onogi, A. Oshima, S. Ozawa, I. H. Park, M. S. Pshirkov, J. Remington, D. C. Rodriguez, G. Rubtsov, D. Ryu, H. Sagawa, R. Sahara, Y. Saito, N. Sakaki, T. Sako, N. Sakurai, K. Sano, T. Seki, K. Sekino, P. D. Shah, F. Shibata, T. Shibata, H. Shimodaira, B. K. Shin, H. S. Shin, J. D. Smith, P. Sokolsky, N. Sone, B. T. Stokes, T. A. Stroman, T. Suzawa, Y. Takagi, Y. Takahashi, M. Takamura, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, H. Tanaka, K. Tanaka, M. Tanaka, Y. Tanoue, S. B. Thomas, G. B. Thomson, P. Tinyakov, I Tkachev, H. Tokuno, T. Tomida, S. Troitsky, Y. Tsunesada, Y. Uchihori, S. Udo, T. Uehama, F. Urban, T. Wong, K. Yada, M. Yamamoto, K. Yamazaki, J. Yang, K. Yashiro, M. Yosei, Y. Zhezher, Z. Zundel

ASTROPHYSICAL JOURNAL LETTERS (2020)

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