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CERN Document Server 13 records found  1 - 10próximo  jump to record: Search took 0.66 seconds. 
1.
HHH Whitepaper / Abouabid, Hamza (Abdelmalek Essaadi U.) ; Arhrib, Abdesslam (Abdelmalek Essaadi U.) ; Arnold, Hannah (Stony Brook U.) ; Azevedo, Duarte (KIT, Karlsruhe, TP) ; Brigljevic, Vuko (Boskovic Inst., Zagreb) ; Chen, Maggie (Oxford U., Theor. Phys.) ; Diaz, Daniel (San Diego State U.) ; Duarte, Javier (San Diego State U.) ; du Pree, Tristan (NIKHEF, Amsterdam ; Twente U., Enschede) ; Falaki, Jaouad El (Ibn Zohr U., Agadir) et al.
We here report on the progress of the HHH Workshop, that took place in Dubrovnik in July 2023. After the discovery of a particle that complies with the properties of the Higgs boson of the Standard Model, all SM parameters are in principle determined. [...]
arXiv:2407.03015.- 2024-11-19 - 117 p. - Published in : 10.1140/epjc/s10052-024-13376-3 Fulltext: document - PDF; 2407.03015 - PDF;
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2.
CEPC Technical Design Report: Accelerator / CEPC Study Group Collaboration
The Circular Electron Positron Collider (CEPC) is a large scientific project initiated and hosted by China, fostered through extensive collaboration with international partners. The complex comprises four accelerators: a 30 GeV Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to 180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar). [...]
arXiv:2312.14363; IHEP-CEPC-DR-2023-01; IHEP-AC-2023-01.- 2024-06-03 - 1106 p. - Published in : Radiat. Detect. Technol. Methods 8 (2024) 1-1105 Fulltext: 2312.14363 - PDF; Publication - PDF;
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3.
Exploring mixed lepton-quark interactions in non-resonant leptoquark production at the LHC / Gonçalves, João (Aveiro U. ; Lund U., Dept. Theor. Phys.) ; Morais, António P. (Aveiro U. ; CERN) ; Onofre, António (Minho U.) ; Pasechnik, Roman (Lund U., Dept. Theor. Phys.)
Searches for new physics (NP) at particle colliders typically involve multivariate analysis of kinematic distributions of final state particles produced in a decay of a hypothetical NP resonance. Since the pair-production cross-sections mediated by such resonances are strongly suppressed by the NP scale, this analysis becomes less relevant for NP searches for masses of the BSM resonance above 1 TeV. [...]
arXiv:2306.15460; CERN-TH-2023-072.- 2023-11-22 - 26 p. - Published in : JHEP 2311 (2023) 147 Fulltext: 2306.15460 - PDF; document - PDF;
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4.
Exploring the viability of a pseudo-Nambu-Goldstone boson as ultralight dark matter in a mass range relevant for strong gravity applications / Morais, António P. (CERN ; U. Aveiro (main)) ; Oliveira, Vinícius (Paraiba U.) ; Onofre, António (Minho U.) ; Pasechnik, Roman (Lund U.) ; Santos, Rui (Lisbon, ISEL ; Lisbon U., CFTC)
We study a simple extension of the Standard Model featuring a dark sector with an ultralight pseudo Nambu-Goldstone boson as dark matter candidate. We focus on the mass range $\mathcal{O}(10^{-20} - 10^{-10})$ eV, relevant for strong gravity applications, and explore its production and evolution in the early Universe. [...]
arXiv:2305.03776; CERN-TH-2023-070; CERN-TH-2023-070.- 2024-08-01 - 23 p. - Published in : Phys. Rev. D 110 (2024) 035008 Fulltext: 2305.03776 - PDF; Publication - PDF;
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5.
Gravitational waves from a scotogenic two-loop neutrino mass model / Bonilla, Cesar (Catolica del Norte U.) ; Carcamo Hernandez, A.E. (CCTVal, Valparaiso) ; Goncalves, Joao (U. Aveiro (main) ; Lund U.) ; K. N., Vishnudath (CCTVal, Valparaiso) ; Morais, Antonio P. (CERN ; Aveiro U.) ; Pasechnik, Roman (Lund U.)
We propose a framework to account for neutrino masses at the two-loop level. This mechanism introduces new scalars and Majorana fermions to the Standard Model. [...]
arXiv:2305.01964; CERN-TH-2023-071.- 2024-05-01 - 18 p. - Published in : Phys. Rev. D 109 (2024) 095022 Fulltext: 2305.01964 - PDF; Publication - PDF;
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6.
Gauge Couplings Evolution from the Standard Model, through Pati–Salam Theory, into E$_{8}$ Unification of Families and Forces / Aranda, Alfredo (Colima U. ; Dual C-P Inst. High Energy Phys.) ; de Anda, Francisco J. (Tepatitlan's Inst. Theor. Studies) ; Morais, António P. (Aveiro U. ; CERN) ; Pasechnik, Roman (Lund U., Dept. Theor. Phys.)
We explore the potential of ultimate unification of the Standard Model matter and gauge sectors into a single $E_8$ superfield in ten dimensions via an intermediate Pati-Salam gauge theory. Through a consistent realisation of a $\mathbb{T}^6/(\mathbb{Z}_6\times \mathbb{Z}_2)$ orbifolding procedure accompanied by the Wilson line breaking mechanism and Renormalisation Group evolution of gauge couplings, we have established several benchmark scenarios for New Physics that are worth further phenomenological exploration..
arXiv:2011.13902.- 2023-02-08 - 17 p. - Published in : Universe 9 (2023) 90 Fulltext: Publication - PDF; 2011.13902 - PDF;
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7.
Gravitational echoes of lepton number symmetry breaking with light and ultralight Majorons / Addazi, Andrea (SCU, Chengdu ; Frascati) ; Marcianò, Antonino (Frascati ; Fudan U.) ; Morais, António P. (CERN ; U. Aveiro (main)) ; Pasechnik, Roman (Lund U.) ; Viana, João (Lisbon U., CFTC) ; Yang, Hao (Fudan U., Shanghai ; Shanghai Jiao Tong U.)
We formulate a version of the low-scale Majoron model equipped with an inverse seesaw mechanism featuring lepton-number preserving dimension-6 operators in the scalar potential. Contrary to its dimension-4 counterpart, we find that the model can simultaneously provide light and ultralight Majorons, neutrino masses and their mixing, while featuring strong first-order cosmological phase transitions associated to the spontaneous breaking of the lepton number and the electroweak symmetries in the early Universe. [...]
arXiv:2304.02399; CERN-TH-2023-054.- 2023-09-14 - 29 p. Fulltext: 2304.02399 - PDF; document - PDF; erratum - PDF;
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8.
Deep Learning Searches for Vector-Like Leptons at the LHC and Electron/Muon Colliders / Morais, António P. (Aveiro U. ; U. Aveiro (main) ; CERN) ; Onofre, António (LIP, Minho) ; Freitas, Felipe F. (Aveiro U. ; U. Aveiro (main)) ; Gonçalves, João (Aveiro U. ; U. Aveiro (main)) ; Pasechnik, Roman (Lund U.) ; Santos, Rui (Lisbon U., CFTC ; Lisbon, ISEL)
The discovery potential of both singlet and doublet vector-like leptons (VLLs) at the Large Hadron Collider (LHC) as well as at the not-so-far future muon and electron machines is explored. The focus is on a single production channel for LHC direct searches while double production signatures are proposed for the leptonic colliders. [...]
arXiv:2108.03926; CERN-TH-2022-217.- 2023-03-21 - 26 p. - Published in : Eur. Phys. J. C 83 (2023) 232 Fulltext: document - PDF; 2108.03926 - PDF;
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9.
CDF II W-mass anomaly faces first-order electroweak phase transition / Addazi, Andrea (SCU, Chengdu ; Frascati) ; Marciano, Antonino (Frascati ; Fudan U.) ; Morais, António P. (Aveiro U.) ; Pasechnik, Roman (Lund U., Dept. Theor. Phys.) ; Yang, Hao (Fudan U.)
We suggest an appealing strategy to probe a large class of scenarios beyond the Standard Model simultaneously explaining the recent CDF II measurement of the $W$ boson mass and predicting first-order phase transitions (FOPT) testable in future gravitational-wave (GW) experiments. Our analysis deploys measurements from the GW channels and high energy particle colliders. [...]
arXiv:2204.10315; CERN-TH-2023-039.- 2023-03-10 - 6 p. - Published in : Eur. Phys. J. C Fulltext: document - PDF; 2204.10315 - PDF;
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10.
Interplay between flavor anomalies and neutrino properties / Freitas, Felipe F. (Aveiro U.) ; Gonçalves, João (Aveiro U.) ; Morais, António P. (Aveiro U. ; CERN) ; Pasechnik, Roman (Lund U., Dept. Theor. Phys. ; Lund U.) ; Porod, Werner (Wurzburg U.)
A minimal extension of the Standard Model (SM) featuring two scalar leptoquarks, an SU(2) doublet with hypercharge 1/6 and a singlet with hypercharge 1/3, is proposed as an economical benchmark model for studies of an interplay between flavour physics and properties of the neutrino sector. The presence of such type of leptoquarks radiatively generates neutrino masses and offers a simultaneous explanation for the current B-physics anomalies involving $b \to c \ell \nu_\ell$ decays. [...]
arXiv:2206.01674; CERN-TH-2022-208.- 2023-12-01 - 17 p. - Published in : Phys. Rev. D 108 (2023) 115002 Fulltext: Publication - PDF; 2206.01674 - PDF;
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Veja também: nomes de autores similares
3 Pasechnik, R
21 Pasechnik, R S
9 Pasechnik, R.
3 Pasechnik, Roman S
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