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2025-07-24
04:36
(Quadratically) Refined Discrete Anomaly Cancellation / Dierigl, Markus (CERN) ; Tartaglia, Michelangelo (CSIC, Madrid)
In this work we study the cancellation of non-perturbative anomalies of gravitational theories with gauge group $\mathbb{Z}_k$ in six dimensions. These subtle anomalies require a classification of deformation classes of manifolds with discrete gauge bundles known as bordism groups. [...]
arXiv:2504.02934; CERN-TH-2025-068; IFT-25-35.- 2025 - 38 p. - Published in : JHEP 2508 (2025) 145 Fulltext: 2504.02934 - PDF; document - PDF;

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2025-07-09
08:26
Superadditivity at Large Charge / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; Oregon U.) ; Fadakar, Ipak (EPFL, Lausanne, LPTP ; Pisa, Scuola Normale Superiore) ; Gomes, Andrew (EPFL, Lausanne, LPTP) ; Monin, Alexander (South Carolina U.) ; Rattazzi, Riccardo (EPFL, Lausanne, LPTP)
The weak gravity conjecture has been invoked to conjecture that the dimensions of charged operators in a CFT should obey a superadditivity relation (sometimes referred to as convexity). In this paper, we study superadditivity of the operator spectrum in theories expanded about the semi-classical saddle point that dominates correlators of large charge operators. [...]
arXiv:2503.16603; CERN-TH-2025-036.- 2025 - 27 p. - Published in : JHEP 2507 (2025) 113 Fulltext: 2503.16603 - PDF; document - PDF;

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2025-06-14
04:36
Personal Memories of 50 Years of Quarkonia / Ellis, John (King's Coll. London ; CERN)
The world of particle physics was revolutionised in November 1974 by the discovery of the J/psi particle, the first particle to be identified as a quarkonium state composed of charm quarks and antiquarks. The charmonium interpretation of the J/psi was cemented by the subsequent observations of a spectrum of related c c̅ states, and finally by the discovery of charmed particles in 1976. [...]
arXiv:2506.10643; KCL-PH-TH/2025-22; CERN-TH-2025-115.- 2025-08-05 - 5 p. - Published in : Nucl. Phys. B 1018 (2025) 117062 Fulltext: 2506.10643 - PDF; publication - PDF;
In : 50 Years Discovery of the J/ψ Particle (2024), Beijing, China, 20 Oct 2024, pp.117062

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2025-05-29
04:35
The anomalous magnetic moment of the muon in the Standard Model: an update / Aliberti, R. (Mainz U., Inst. Phys. ; U. Mainz, PRISMA) ; Aoyama, T. (Tokyo U., ISSP) ; Balzani, E. (INFN, Padua ; Padua U.) ; Bashir, A. (IFM-UMSNH, Michoacan ; Escuela Poli. Sup. U., Huelva) ; Benton, G. (Illinois U., Urbana) ; Bijnens, J. (Lund U.) ; Biloshytskyi, V. (Mainz U., Inst. Phys. ; U. Mainz, PRISMA) ; Blum, T. (Connecticut U. ; RIKEN BNL) ; Boito, D. (Sao Paulo U., Sao Carlos) ; Bruno, M. (Milan Bicocca U. ; INFN, Milan Bicocca) et al.
We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, $a_μ$, updating the first White Paper (WP20) [1]. The pure QED and electroweak contributions have been further consolidated, while hadronic contributions continue to be responsible for the bulk of the uncertainty of the SM prediction. [...]
arXiv:2505.21476; CERN-TH-2025-101; FERMILAB-PUB-25-0344-T; INT-PUB-25-015; IPARCOS-UCM-25-029; KEK Preprint 2025-22; LTH 1403; MITP-25-037; UWThPh 2025-15; UWThPh 2025-15; ZU-TH 37/25; IPARCOS-UCM-25-029.- 2025-09 - 188 p. - Published in : Phys. Rep. 1143 (2025) 1-158 Fulltext: 2505.21476 - PDF; dc089d0865516c2a08ade9cf28ac37b1 - PDF; External link: Fermilab Library Server

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2025-05-21
04:14
ADM, BMS, and some puzzling interconnections / Veneziano, Gabriele (CERN ; College de France)
The precise connection between the ADM and BMS formalisms is still far from being fully understood. It leads superficially to some puzzles whose resolution can provide new interesting physical insights. [...]
arXiv:2505.11937; CERN-TH-2025-042.- 2025-05-15 - 14 p. - Published in : J. Phys. A: Math. Theor. 58 (2025) 205402 Fulltext: 2505.11937 - PDF; document - PDF;

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2025-05-20
04:06
The LHC has ruled out supersymmetry – really? / Constantin, L. (LPSC, Grenoble) ; Kraml, S. (LPSC, Grenoble) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris)
Despite early hopes that the Large Hadron Collider (LHC) would quickly unveil supersymmetric particles, none have been detected to date. This review examines the impact of the LHC results on the viability of weak-scale supersymmetry, and discusses whether the possibility of discovering supersymmetric particles remains within reach..
arXiv:2505.11251; CERN-TH-2025-100.- 2025-07-03 - 10 p. - Published in : Nucl. Phys. B 1018 (2025) 117012 Fulltext: 2505.11251 - PDF; document - PDF;

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2025-05-20
04:04
Spontaneous Magnetogenesis at the Electroweak Phase Transition / Domcke, Valerie (CERN) ; Ema, Yohei (CERN) ; Patel, Teerthal (Vanderbilt U.)
Spontaneous CP violation during the electroweak phase transition can induce a twisting of the magnetic field configuration of Standard Model dumbbells, resulting in sizable intergalactic magnetic fields and a small baryon asymmetry, in agreement with observations. We demonstrate this by coupling the electroweak gauge group of the Standard Model to an axion-like particle with a non-vanishing velocity. [...]
arXiv:2505.10637; CERN-TH-2025-089.- 2025-09-10 - 26 p. - Published in : JCAP 2509 (2025) 023 Fulltext: 2505.10637 - PDF; document - PDF;

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2025-05-07
04:03
The Simplest Dark Matter Model at the Edge of Perturbativity / Escudero Abenza, Miguel (CERN) ; Hambye, Thomas (Brussels U.)
Increasingly sensitive direct detection dark matter experiments are testing important regions of parameter space for WIMP dark matter and pushing many models to the multi-TeV regime. This brings into question the perturbativity of these models. [...]
arXiv:2505.02408; CERN-TH-2025-087; ULB-TH/25-04.- 2025-06-27 - 6 p. - Published in : Phys. Lett. B 868 (2025) 139696 Fulltext: 2505.02408 - PDF; document - PDF;

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2025-04-25
04:05
Long distance contributions to neutral $D$-meson mixing from lattice QCD / Di Carlo, Matteo (CERN) ; Erben, Felix (CERN) ; Hansen, Maxwell T. (Edinburgh U.)
The study of neutral $D$-meson mixing provides a unique probe of long-distance effects in the charm sector, where Standard Model contributions are dominated by nonperturbative effects. In this work, we investigate the feasibility of using spectral reconstruction techniques within lattice QCD to compute the long-distance contributions to $D^0- \bar{D}^0$ mixing. [...]
arXiv:2504.16189; CERN-TH-2025-075.- 2025-07-22 - 47 p. - Published in : JHEP 2025 (2020) 229 Fulltext: 2504.16189 - PDF; document - PDF;

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2025-04-19
04:01
Geometry of soft scalars at one loop / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; Oregon U.) ; Fadakar, Ipak (EPFL, Lausanne, LPTP ; Pisa, Scuola Normale Superiore) ; Helset, Andreas (CERN) ; Nardi, Filippo (EPFL, Lausanne, LPTP)
We extend the soft theorems for scattering amplitudes of scalar effective field theories to one-loop order. Our analysis requires carefully accounting for the fact that the soft limit is not guaranteed to commute with evaluating IR-divergent loop integrals; new results for the soft limit of general scalar one-loop integrals are presented. [...]
arXiv:2504.12371; CERN-TH-2025-081.- 2025 - 24 p. - Published in : JHEP 2508 (2025) 140 Fulltext: 2504.12371 - PDF; document - PDF;

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