CERN Accelerating science

TH Articles

Invisible dilaton / Brax, Philippe (IPhT, Saclay ; CERN) ; Burrage, Clare (Nottingham U.) ; Cembranos, Jose A.R. (Madrid U.) ; Valageas, Patrick (IPhT, Saclay)
We analyse the dynamics of a light scalar field responsible for the $\mu$ term of the Higgs potential and coupled to matter via the Higgs-portal mechanism. We find that this dilaton model is stable under radiative corrections induced by the standard model particle masses. [...]
arXiv:2303.14469; IPARCOS-UCM-23-021; CERN-TH-2023-049.- 2023-05-01 - 36 p. - Published in : Phys. Rev. D 107 (2023) 095015 Fulltext: 2303.14469 - PDF; Publication - PDF;

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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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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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Towards Resolving the Gallium Anomaly / Brdar, Vedran (CERN) ; Gehrlein, Julia (CERN) ; Kopp, Joachim (CERN ; Mainz U., Inst. Phys. ; U. Mainz, PRISMA)
A series of experiments studying neutrinos from intense radioactive sources have reported a deficit in the measured event rate which, in combination, has reached a statistical significance of $\sim 5\sigma$. In this paper, we explore avenues for explaining this anomaly, both within the Standard Model and beyond. [...]
arXiv:2303.05528; CERN-TH-2023-036.- 2023-05-17 - 25 p. - Published in : JHEP 2305 (2023) 143 Fulltext: 2303.05528 - PDF; document - PDF;

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NNLO QCD predictions for Z-boson production in association with a charm jet within the LHCb fiducial region / Gauld, R. (Munich, Max Planck Inst.) ; Gehrmann-De Ridder, A. (ETH, Zurich (main) ; Zurich U.) ; Glover, E.W. N. (Durham U., IPPP ; Durham U.) ; Huss, A. (CERN) ; Garcia, A. Rodriguez (ETH, Zurich (main)) ; Stagnitto, G. (Zurich U.)
We compute next-to-next-to-leading order (NNLO) QCD corrections to neutral vector boson production in association with a charm jet at the LHC. This process is studied in the forward kinematics at $\sqrt{s}=13$ TeV, which may provide valuable constraints on the intrinsic charm component of the proton. [...]
arXiv:2302.12844; MPP-2023-37; ZU-TH 12/23; IPPP/23/09; CERN-TH-2023-034.- 2023-04-27 - 22 p. - Published in : Eur. Phys. J. C 83 (2023) 336 Fulltext: document - PDF; 2302.12844 - PDF;

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Neutrino magnetic moment portal and supernovae: New constraints and multimessenger opportunities / Brdar, Vedran (CERN) ; de Gouvêa, André (Northwestern U.) ; Li, Ying-Ying (PCFT, Hefei ; USTC, Hefei) ; Machado, Pedro A.N. (Fermilab)
We scrutinize the hypothesis that gauge singlet fermions -- sterile neutrinos -- interact with Standard Model particles through the transition magnetic moment portal. These interactions lead to the production of sterile neutrinos in supernovae followed by their decay into photons and active neutrinos which can be detected at $\gamma$-ray telescopes and neutrino detectors, respectively. [...]
arXiv:2302.10965; FERMILAB-PUB-23-063-T; NUHEP-TH/23-01; CERN-TH-2023-024; USTC-ICTS/PCFT-23-06.- 2023-04-01 - 8 p. - Published in : Phys. Rev. D 107 (2023) 073005 Fulltext: 2302.10965 - PDF; Publication - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server

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Precision phenomenology with fiducial cross sections in the triple-differential Drell-Yan process / Gehrmann-De Ridder, A. (Zurich, ETH ; Zurich U.) ; Gehrmann, T. (Zurich U.) ; Glover, E.W. N. (Durham U., IPPP) ; Huss, A. (CERN) ; Preuss, C.T. (Zurich, ETH) ; Walker, D.M. (Durham U., IPPP)
The production of lepton pairs (Drell-Yan process) at the LHC is being measured to high precision, enabling the extraction of distributions that are triply differential in the di-lepton mass and rapidity as well as in the scattering angle described by the leptons. The measurements are performed for a fiducial phase space, defined by cuts on the individual lepton momenta and rapidities. [...]
arXiv:2301.11827; CERN-TH-2023-011; IPPP/23/03; ZU-TH 03/23.- 2023-05-02 - 43 p. - Published in : JHEP 2305 (2023) 002 Fulltext: document - PDF; 2301.11827 - PDF;

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Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data / Ivanov, Mikhail M. (Princeton, Inst. Advanced Study ; NASA, Goddard) ; Philcox, Oliver H.E. (Princeton, Inst. Advanced Study ; Columbia U. ; Stony Brook U., New York, SCGP ; Princeton U.) ; Cabass, Giovanni (Princeton, Inst. Advanced Study) ; Nishimichi, Takahiro (Kyoto U., Yukawa Inst., Kyoto ; Tokyo U., IPMU) ; Simonović, Marko (CERN) ; Zaldarriaga, Matias (Princeton, Inst. Advanced Study)
We present a framework for self-consistent cosmological analyses of the full-shape anisotropic bispectrum, including the quadrupole $(\ell=2)$ and hexadecapole $(\ell=4)$ moments. This features a novel window-free algorithm for extracting the latter quantities from data, derived using a maximum-likelihood prescription. [...]
arXiv:2302.04414; YITP-23-13; CERN-TH-2023-022.- 2023-04-15 - 40 p. - Published in : Phys. Rev. D 107 (2023) 083515 Fulltext: PDF;

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Massive three-loop form factors: anomaly contribution / Fael, Matteo (CERN) ; Lange, Fabian (KIT, Karlsruhe, TTP ; KIT, Karlsruhe, IAP) ; Schönwald, Kay (Zurich U.) ; Steinhauser, Matthias (KIT, Karlsruhe, TTP)
We compute three-loop corrections to the singlet form factors for massive quarks using a semi-analytic method which provides precise results over the whole kinematic range. Particular emphasis is put on the anomaly contribution originating from an external axial-vector current. [...]
arXiv:2302.00693; CERN-TH-2023-012; P3H-23-006; TTP23-002; ZU-TH 05/23.- 2023-05-01 - 21 p. - Published in : Phys. Rev. D 107 (2023) 094017 Fulltext: 2302.00693 - PDF; Publication - PDF;

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A quantum analytical Adam descent through parameter shift rule using Qibo / Robbiati, Matteo (Milan U. ; INFN, Milan ; CERN) ; Efthymiou, Stavros (Technol. Innovation Inst., UAE) ; Pasquale, Andrea (Milan U. ; INFN, Milan ; Technol. Innovation Inst., UAE) ; Carrazza, Stefano (Milan U. ; INFN, Milan ; CERN ; Technol. Innovation Inst., UAE)
In this proceedings we present quantum machine learning optimization experiments using stochastic gradient descent with the parameter shift rule algorithm. We first describe the gradient evaluation algorithm and its optimization procedure implemented using the Qibo framework. [...]
arXiv:2210.10787; CERN-TH-2022-168; TIF-UNIMI-2022-20.- 2022-11-13 - 6 p. - Published in : PoS: ICHEP2022 (2022) , pp. 206
Fulltext: 2210.10787 - PDF; document - PDF;
In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.206

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