Superoscillations in high energy physics and gravity

Autor: Andrea Addazi, Qingyu Gan

Publikováno v: European Physical Journal C: Particles and Fields, Vol 84, Iss 6, Pp 1-29 (2024)

Abstract We explore superoscillations within the context of classical and quantum field theories, presenting novel solutions to Klein–Gordon’s, Dirac’s, Maxwell’s and Einstein’s equations. In particular, we illustrate a procedure of second

Externí odkaz: https://doaj.org/article/9bb39eb7b29240779af0333009f87b92

Modified Supergravity Phenomenology in Gravitational Waves Era

Autor: Andrea Addazi, Qingyu Gan

Publikováno v: Universe, Vol 8, Iss 5, p 280 (2022)

We discuss phenomenological aspects of modified supergravity (MSG) in gravitational wave (GW) physics. MSG naturally provides double inflation and primordial black holes (PBHs) as cold dark matter. Intriguingly, MSG predicts a large amplification of

Externí odkaz: https://doaj.org/article/785088212c83421694062331bac95ca0

Induced Gravitational Waves from Multi-Sound Speed Resonances during Cosmological Inflation

Autor: Andrea Addazi, Salvatore Capozziello, Qingyu Gan

We explore the possibility of multi-parametric resonances from time varying sound speed during cosmological inflation. In particular, we fix our set-up to the simpler case beyond a single oscillation model already explored in literature: two sinusoid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67a8af50dc2b4e0cac03017495562b98
http://arxiv.org/abs/2204.07668

Dark Matter Searches for heavy Dark Matter with LHAASO

Autor: Pino Di Sciascio, M. Khlopov, Alexander S. Sakharov, Qingyu Gan, Paolo Panci, Michael Kachekriess, Vladimir Korchagin, Roman Pasechnick, Filippo Sala, Vladimir Kuksa, Andrei Neronov, K. M. Belotsky, Nicolao Fornengo, Arman Esmaili, N. Volchanskiy, Alexander Korochkin, Andrea Addazi, Vitaly Beylin, Pasquale D. Serpico, Dimitri Semikoz, Marco Cirelli, Antonino Marciano

Publikováno v: 37th International Cosmic Ray Conference
37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.574, ⟨10.22323/1.395.0574⟩
Proceedings of Science
37th International Cosmic Ray Conference (ICRC 2021)
37th International Cosmic Ray Conference (ICRC 2021), Jul 2021, Berlin, Germany. pp.574, ⟨10.22323/1.395.0574⟩

International audience; We discuss the implications of next future LHAASO data on searches of Heavy Dark Matter decays.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5e4ee07a616b8217c349178ee4619fc
https://hal.archives-ouvertes.fr/hal-03359029/file/document-1.pdf

Photon Spheres and Spherical Accretion Image of a Hairy Black Hole

Autor: Haitang Yang, Houwen Wu, Peng Wang, Qingyu Gan

In this paper, we first consider null geodesics of a class of charged, spherical and asymptotically flat hairy black holes in an Einstein-Maxwell-scalar theory with a non-minimal coupling for the scalar and electromagnetic fields. Remarkably, we show

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f366970036e8ac20684ee94951f6e9d
http://arxiv.org/abs/2104.08703