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1.
Black Holes and Baryon Number Violation: Unveiling the Origins of Early Galaxies and the Low-Mass Gap / Gogberashvili, Merab (Javakhishvili State U. ; Tbilisi, Inst. Phys.) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN)
We propose that modifications to the Higgs potential within a narrow atmospheric layer near the event horizon of an astrophysical black hole could significantly enhance the rate of sphaleron transitions, as well as transform the Chern-Simons number into a dynamic variable. [...]
arXiv:2411.10847.
- 26.
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2.
Probing Lorentz invariance with a high-energy neutrino flare / Bustamante, Mauricio (Bohr Inst.) ; Ellis, John (King's Coll. London ; CERN) ; Konoplich, Rostislav (Manhattan Coll., Riverdale ; New York U.) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN)
Time-of-flight measurements of high-energy astrophysical neutrinos can be used to probe Lorentz invariance, a pillar of modern physics. [...]
KCL-PH-TH/2024-22 ; CERN-TH-2024-056 ; arXiv:2408.15949.
- 16.
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3.
Primordial Black Holes from Spatially Varying Cosmological Constant Induced by Field Fluctuations in Extra Dimensions / Popov, Arkady A. (Kazan State U.) ; Rubin, Sergey G. (Kazan State U. ; Moscow Phys. Eng. Inst.) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN)
The origin and evolution of supermassive black holes (SMBHs) in our universe have sparked controversy. In this study, we explore the hypothesis that some of these black holes may have seeded from the direct collapse of dark energy domains with density significantly higher than the surrounding regions. [...]
arXiv:2404.00449.- 2024-03-31 - 31 p. - Published in : Universe: 10 (2024) , no. 4, pp. 166 Fulltext: Publication - PDF; 2404.00449 - PDF;
4.
Chapter 5 Dark Matter and New Physics Beyond the Standard Model with LHAASO / Bi, Xiao-Jun (Beijing, Inst. High Energy Phys.) ; Addazi, Andrea (SCU, Chengdu ; Frascati) ; Belotsky, Konstantin (Moscow Phys. Eng. Inst.) ; Beylin, Vitaly (Southern Federal U.) ; Cirelli, Marco (Paris, LPTHE) ; Esmaili, Arman (Rio de Janeiro, Pont. U. Catol.) ; Fornengo, Nicolao (INFN, Turin) ; Gan, Qing-Yu (SCU, Chengdu) ; Kachekriess, Michael (Norwegian U. Sci. Tech.) ; Khlopov, Maxim (APC, Paris ; Moscow Phys. Eng. Inst. ; Southern Federal U.) et al.
Abstract In order to reveal the nature of dark matter, it is crucial to detect its non-gravitational interactions with the standard model particles. The traditional dark matter searches focused on the so-called weakly interacting massive particles. [...]
2022 - 13 p. - Published in : Chin. Phys. C 46 (2022) 030005 Fulltext: PDF;
5.
Study of exclusive two-body W decays with fully reconstructible kinematics / Bagdatova, Alsu G. (Lebedev Inst.) ; Baranov, Sergey P. (Lebedev Inst.) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN)
In the framework of electroweak theory and perturbative quantum chromodynamics, we examine various exclusive decay channels of $W$ bosons that can be fully or partially reconstructed. Our findings provide predictions for the partial widths and address some gaps in previous literature. [...]
arXiv:2303.02136.- 2023-08-09 - 16 p. - Published in : Mod. Phys. Lett. A 38 (2023) 2350073 Fulltext: PDF;
6.
Report of the Topical Group on Cosmic Probes of Fundamental Physics for for Snowmass 2021 / Adhikari, Rana X. (Caltech) ; Anchordoqui, Luis A. (Lehman Coll. ; City Coll., N.Y. ; Amer. Museum Natural Hist.) ; Fang, Ke (Wisconsin U., Madison) ; Sathyaprakash, B.S. (Penn State U., University Park, IGC ; Penn State U., Astron. Astrophys. ; Cardiff U.) ; Tollefson, Kirsten (Michigan State U.) ; Lewis, Tiffany R. (NASA, Goddard) ; Engel, Kristi (Maryland U. ; Los Alamos) ; Aboubrahim, Amin (U. Munster) ; Akarsu, Ozgur (Istanbul, Tech. U.) ; Akrami, Yashar (Case Western Reserve U.) et al.
Cosmic Probes of Fundamental Physics take two primary forms: Very high energy particles (cosmic rays, neutrinos, and gamma rays) and gravitational waves. [...]
arXiv:2209.11726.
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7.
Measurement of the inclusive $t\bar{t}$ production cross section in the lepton+jets channel in $pp$ collisions at $\sqrt{s}$= 7 TeV with the ATLAS detector using support vector machines / ATLAS Collaboration
A measurement of the top quark pair-production cross section in the lepton+jets decay channel is presented. It is based on 4.6 fb$^{-1}$ of $\sqrt{s} = 7$ TeV $pp$ collision data collected during 2011 by the ATLAS experiment at the CERN Large Hadron Collider. [...]
arXiv:2212.00571; CERN-EP-2022-191.- Geneva : CERN, 2023-08-01 - 34 p. - Published in : Phys. Rev. D 108 (2023) 032014 Fulltext: 2212.00571 - PDF; Publication - PDF; External link: Previous draft version
8.
Possible Manifestation of a Non-Pointness of the Electron in $e^+e^-$ Annihilation Reaction at Centre of Mass Energies 55-207 GeV / Chen, Yutao (Hefei, CUST) ; Lin, Chih-Hsun (Taiwan, Inst. Phys.) ; Liu, Minghui (Hefei, CUST) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN) ; Ulbricht, Jürgen (Zurich, ETH) ; Zhao, Jiawei (Hefei, CUST)
The experimental data from VENUS, TOPAS, OPAL, DELPHI, ALEPH and L3 collaborations, collected from 1989 to 2003, are applied to study the QED framework through direct contact interaction terms approach, using the annihilation reaction $\rm e^+ e^-\rightarrow \gamma\gamma(\gamma)$. The analysis involves performing of a $\chi^{2}$ test to detect the presence of an excited electron $e^{*}$ and evidence of non-point like behavior in the $e^+e^-$ annihilation zone. [...]
arXiv:2210.11149.- 2023-07-10 - 32 p. - Published in : Physics 5 (2023) 752-783 Fulltext: 2210.11149 - PDF; Publication - PDF;
9.
Measurement of the top-quark mass using a leptonic invariant mass in $pp$ collisions at $\sqrt{s}=13~\textrm{TeV}$ with the ATLAS detector / ATLAS Collaboration
A measurement of the top-quark mass ($m_t$) in the $t\bar{t}\rightarrow~\textrm{lepton}+\textrm{jets}$ channel is presented, with an experimental technique which exploits semileptonic decays of $b$-hadrons produced in the top-quark decay chain. The distribution of the invariant mass $m_{\ell\mu}$ of the lepton, $\ell$ (with $\ell=e,\mu$), from the $W$-boson decay and the muon, $\mu$, originating from the $b$-hadron decay is reconstructed, and a binned-template profile likelihood fit is performed to extract $m_t$. [...]
arXiv:2209.00583; CERN-EP-2020-018.- Geneva : CERN, 2023-06-05 - 54 p. - Published in : JHEP 2306 (2023) 019 Fulltext: 2209.00583 - PDF; document - PDF; External link: Previous draft version
10.
Dark Matter Searches for heavy Dark Matter with LHAASO / Addazi, Andrea (Sichuan U. ; INFN, Rome) ; Belotsky, Konstantin (Moscow Phys. Eng. Inst.) ; Beylin, Vitaly (Southern Federal U.) ; Cirelli, Marco (Paris, LPTHE) ; DiSciascio, Giuseppe (INFN, Rome) ; Esmaili, Arman (Rio de Janeiro, Pont. U. Catol.) ; Fornengo, Nicolao (Turin U. ; INFN, Turin) ; Gan, Qingyu (Sichuan U.) ; Kachekriess, Michael (Norwegian U. Sci. Tech.) ; Khlopov, Maxim (APC, Paris ; Moscow Phys. Eng. Inst. ; Southern Federal U.) et al.
We discuss the implications of next future LHAASO data on searches of Heavy Dark Matter decays..
SISSA, 2021 - 8 p. - Published in : PoS ICRC2021 (2021) 574 Fulltext: PDF;
In : 37th International Cosmic Ray Conference (ICRC 2021), Berlin, Germany, 15 - 22 Jul 2021, pp.574

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