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2024-06-15
04:17
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;

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2024-06-15
04:14
Evolution of the nuclear spin-orbit splitting explored via the $^{32}$Si($d$,$p$)$^{33}$Si reaction using SOLARIS / Chen, J. (SUSTech, Shenzhen ; Argonne) ; Kay, B.P. (Argonne) ; Hoffman, C.R. (Argonne) ; Tang, T.L. (Argonne) ; Tolstukhin, I.A. (Argonne) ; Bazin, D. (Michigan State U.) ; Lubna, R.S. (Michigan State U.) ; Ayyad, Y. (Santiago de Compostela U., IGFAE) ; Beceiro-Novo, S. (Michigan State U.) ; Coombes, B.J. (Australian Natl. U., Canberra) et al.
The spin-orbit splitting between neutron 1$p$ orbitals at $^{33}$Si has been deduced using the single-neutron-adding ($d$,$p$) reaction in inverse kinematics with a beam of $^{32}$Si, a long-lived radioisotope. Reaction products were analyzed by the newly implemented SOLARIS spectrometer at the reaccelerated-beam facility at the National Superconducting Cyclotron Laboratory. [...]
arXiv:2404.05434.- 2024-04-29 - 10 p. - Published in : Phys. Lett. B 853 (2024) 138678 Fulltext: 2404.05434 - PDF; Publication - PDF;

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2024-06-15
04:14
The sounds of science—a symphony for many instruments and voices: part II / ’t Hooft, Gerard (Utrecht U.) ; Phillips, William D. (NIST, Wash., D.C. ; Joint Quantum Inst., College Park) ; Zeilinger, Anton (IQOQI, Vienna) ; Allen, Roland (Texas A-M) ; Baggott, Jim (Oakland U.) ; Bouchet, François R. (Paris, Inst. Astrophys.) ; Cantanhede, Solange M.G. (Rio de Janeiro, CBPF) ; Castanedo, Lázaro A.M. (St. Mary's U., Halifax) ; María Cetto, Ana (Mexico U.) ; Coley, Alan A. (Dalhousie U., Math. Dept.) et al.
Despite its amazing quantitative successes and contributions to revolutionary technologies, physics currently faces many unsolved mysteries ranging from the meaning of quantum mechanics to the nature of the dark energy that will determine the future of the Universe. It is clearly prohibitive for the general reader, and even the best informed physicists, to follow the vast number of technical papers published in the thousands of specialized journals. [...]
arXiv:2404.11724.- 2024-04-15 - 54 p. - Published in : Phys. Scr. Fulltext: 2404.11724 - PDF; Publication - PDF;

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2024-06-15
04:08
The Spectral Condition, Plane Waves, and Harmonic Analysis in de Sitter and Anti-de Sitter Quantum Field Theories / Moschella, Ugo (Insubria U., Como ; CERN ; INFN, Milan)
We review the role of the spectral condition as a characteristic feature unifying Minkowski, de Sitter and anti de Sitter Quantum Field Theory. In this context, we highlight the role of an important class of plane waves which are either de Sitter or anti de Sitter covariant and are compatible with the relevant analyticity domains linked to the spectral condition(s). [...]
arXiv:2403.15893.- 2024-04-28 - 23 p. - Published in : Universe 10 (2024) 199 Fulltext: 2403.15893 - PDF; Publication - PDF;

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2024-06-12
06:20
AUP First Pre-Series Cryo-Assembly Design Production and Test Overview / Feher, S (Fermilab) ; Ambrosio, G (Fermilab) ; Apollinari, G (Fermilab) ; Baldini, M (Fermilab) ; Bossert, R (Fermilab) ; Carcagno, R (Fermilab) ; Chlachidze, G (Fermilab) ; DiMarco, J (Fermilab) ; Rabehl, R (Fermilab) ; Stoynev, S (Fermilab) et al.
New high field and large-aperture quadrupole magnets for the low-beta inner triplets (Q1, Q2, Q3) have been built and tested as part of the high-luminosity upgrade of the Large Hadron Collider (HL-LHC). These new quadrupole magnets are based on Nb3Sn superconducting technology. [...]
FERMILAB-CONF-23-0891-TD.- 2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4005605 Fermilab Library Server: PDF; External link: Fermilab Library Server

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2024-06-12
06:20
Compatibility and combination of world W-boson mass measurements / LHC-TeV MW Working Group Collaboration
The compatibility of W-boson mass measurements performed by the ATLAS, LHCb, CDF, and D0 experiments is studied using a coherent framework with theory uncertainty correlations. The measurements are combined using a number of recent sets of parton distribution functions (PDF), and are further combined with the average value of measurements from the Large Electron-Positron collider. [...]
arXiv:2308.09417.- 2024 - 22 p. - Published in : Eur. Phys. J. C 84 (2024) 451 Fulltext: 2308.09417 - PDF; Publication - PDF;

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2024-06-12
06:20
Quantum Fuzzy Inference Engine for Particle Accelerator Control / Acampora, Giovanni (Naples U. ; INFN, Naples) ; Grossi, Michele (CERN) ; Schenk, Michael (CERN) ; Schiattarella, Roberto (Naples U. ; INFN, Naples)
Recently, quantum computing has been proven as an ideal theory for the design of fuzzy inference engines, thanks to its capability to efficiently solve the rule explosion problem. In this scenario, a quantum fuzzy inference engine (QFIE) was proposed as a quantum algorithm able to generate an exponential computational advantage over conventional fuzzy inference engines. [...]
2024 - 13 p. - Published in : IEEE Trans. Quantum Eng. 5 (2024) 1-13

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2024-06-12
06:19
Effects of High Fluence Particle Irradiation on Germanium-on-Silicon Photodiodes / Olanterä, Lauri (CERN) ; Scarcella, Carmelo (CERN) ; Lalović, Milana (CERN ; Belgrade U.) ; Détraz, Stéphane (CERN) ; Pandey, Awanish (CERN) ; Prousalidi, Theoni (CERN ; Natl. Tech. U., Athens) ; Sandven, Ulrik (CERN) ; Sigaud, Christophe (CERN) ; Soós, Csaba (CERN) ; Troska, Jan (CERN)
Waveguide-Integrated Germanium-on-Silicon (Ge-on-Si) photodiodes are integral components in silicon photonics and understanding their radiation tolerance is important for applications that intend to use silicon photonics in harsh radiation environments. Here we report the results of high fluence particle irradiation tests on Ge-on-Si photodiodes. [...]
2024 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 71 (2024) 728-735

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2024-06-12
04:54
The maximal frequency of cosmic gravitons / Giovannini, Massimo (INFN, Milan Bicocca ; CERN)
We show that the maximal frequency of cosmic gravitons must not exceed the THz domain. From a classical viewpoint, both in conventional inflationary scenarios and in bouncing models the largest frequency of the spectrum overshoots the MHz band even if its specific signature is model dependent. [...]
arXiv:2311.17725.- 2024-06-03 - 11 p. - Published in : Phys. Lett. B 854 (2024) 138769 Fulltext: Publication - PDF; 2311.17725 - PDF;

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2024-06-12
04:53
Fuzzy bounces / Giovannini, Massimo (CERN ; INFN, Milan Bicocca)
We observe that the energy and the enthalpy densities can be smeared by two fudge factors that are constrained by the contracted Bianchi identities. Depending on the analytic properties of the smearing functions the underlying cosmological solutions belong to two physically different classes, namely the bounces of the scale factor and the curvature bounces. [...]
arXiv:2402.08089.- 2024-04-24 - 35 p. - Published in : Class. Quantum Gravity 41 (2024) 105010 Fulltext: 2402.08089 - PDF; Publication - PDF;

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