2026-04-02
04:25 |
First-principle evaluation of inclusive hadronic $τ$ decays in QCD+QED
/ Di Carlo, Matteo (CERN) ; Bacchio, Simone (Cyprus Inst.) ; Bäske, Erik (Humboldt U., Berlin (main)) ; De Santis, Alessandro (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Evangelista, Antonio (Cyprus U.) ; Frezzotti, Roberto (INFN, Rome2 ; Rome U., Tor Vergata) ; Gagliardi, Giuseppe (INFN, Rome3) ; Holan, Lukas (Humboldt U., Berlin (main)) ; Lubicz, Vittorio (INFN, Rome3 ; Rome III U.) ; Maio, Lorenzo (INFN, Rome2 ; U. Rome 2, Tor Vergata (main)) et al.
We present a strategy to extend lattice calculations of inclusive hadronic $τ$ decays from isosymmetric QCD to QCD+QED. The inclusive decay rate can be related to suitable Euclidean correlation functions, allowing for a first-principles evaluation of electromagnetic and isospin-breaking effects. [...]
arXiv:2603.29016; CERN-TH-2026-067.-
2026-03-30 - 10 p.
- Published in : PoS: LATTICE2025 (2025) , pp. 249
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In : 42th International Symposium on Lattice Field Theory (Lattice 2025), Mumbai, India, 2 - 8 Nov 2025, pp.
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2026-03-27
06:07 |
Ground-State Extraction of Heavy-Light Meson Semileptonic Decay Form Factors
/ D'Anna, A. (Madrid, IFT ; Madrid, Autonoma U.) ; Conigli, A. (Mainz U. ; Darmstadt, GSI) ; Fritzsch, P. (Trinity Coll., Dublin) ; Gérardin, A. (Marseille, CPT) ; Heitger, J. (Munster U., ITP) ; Herdoíza, G. (Madrid, IFT ; Madrid, Autonoma U.) ; Husung, N. (Madrid, IFT ; Madrid, Autonoma U. ; CERN) ; Kuberski, S. (CERN) ; Pena, C. (Madrid, IFT ; Madrid, Autonoma U.) ; Simma, H. (NIC, Zeuthen)
We discuss the extraction of heavy-light pseudo-scalar to light pseudo-scalar decay form factors from finite time correlation functions. We place particular emphasis on the contamination from excited states employing summed ratios and input from chiral perturbation theory. [...]
arXiv:2603.24491; CERN-TH-2026-057; IFT-UAM/CSIC-26-37; MS-TP-26-10.-
2026-03-25 - 11 p.
- Published in : PoS: LATTICE2025 (2026) , pp. 246
Fulltext: PDF;
In : 42th International Symposium on Lattice Field Theory (Lattice 2025), Mumbai, India, 2 - 8 Nov 2025, pp.246
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2026-01-17
07:04 |
Resonant Landau-Zener conversion in multi-axion systems
/ Dunsky, David I. (New York U., CCPP) ; Manzari, Claudio Andrea (UC, Berkeley ; LBL, Berkeley) ; Quílez, Pablo (UC, San Diego ; CERN) ; Ramos, Maria (CERN) ; Sørensen, Philip (U. Padua, Dept. Phys. Astron. ; INFN, Padua)
Multiple axions may emerge in the low-energy effective theory of Nature. Generically, the potentials describing these axion fields are non-diagonal, leading to mass mixing between axion states which can be temperature-dependent due to QCD instanton effects. [...]
arXiv:2507.06287; CERN-TH-2025-131.-
2026-01-12 - 10 p.
- Published in : JHEP 2601 (2026) 077
Fulltext: 2507.06287 - PDF; document - PDF;
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2025-12-03
04:49 |
Three-loop corrections to $gg\to ZH$ in the large top quark mass limit
/ Davies, Joshua (U. Liverpool (main)) ; Grau, Dominik (KIT, Karlsruhe) ; Schönwald, Kay (Zurich U.) ; Steinhauser, Matthias (KIT, Karlsruhe) ; Stremmer, Daniel (KIT, Karlsruhe)
We compute three-loop virtual corrections to the associated production of a Higgs boson with a $Z$ boson in the large-$m_t$ limit. We describe in detail the application of the asymptotic expansion and provide, for all form factors, analytic results for the first three terms in the $1/m_t$ expansion. [...]
arXiv:2512.00156; CERN-TH-2025-245; P3H-25-101; TTP25-047.-
2026-02-18 - 14 p.
- Published in : JHEP 2602 (2026) 191
Fulltext: 2512.00156 - PDF; document - PDF;
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2025-11-21
04:10 |
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2025-11-15
04:21 |
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2025-11-12
05:01 |
Magnusian : relating the eikonal phase, the on-shell action, and the scattering generator
/ Kim, Jung-Wook (CERN ; Potsdam, Max Planck Inst.) ; Patil, Raj (Potsdam, Max Planck Inst. ; Humboldt U., Berlin) ; Scheopner, Trevor (Potsdam, Max Planck Inst.) ; Steinhoff, Jan (Potsdam, Max Planck Inst.)
Two fundamentally distinct types of quantities are both called "eikonal" in present amplitudes literature. The unitarity of the S-matrix ensures it can be written as the exponential of a Hermitian operator. [...]
arXiv:2511.05649; CERN-TH-2025-226; HU-EP-25/37-RTG.-
2026-03-25 - 42 p.
- Published in : JHEP 2603 (2026) 241
Fulltext: 2511.05649 - PDF; document - PDF;
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2025-11-11
04:30 |
Fast and Flexible Neutrino Decoupling Part I: The Standard Model
/ Escudero, M. (CERN) ; Jackson, G. (SUBATECH, Nantes) ; Laine, M. (U. Bern (main)) ; Sandner, S. (Los Alamos)
Cosmological determinations of the number of relativistic neutrino species, $N^{ }_{\rm eff}$, are becoming increasingly accurate, and further improvements are expected both from CMB and BBN data. Given this context, we update the evaluation of $N^{ }_{\rm eff}$ and the current entropy density via the momentum-averaged approach. [...]
arXiv:2511.04747; LA-UR-25-30442; CERN-TH-2025-225.-
2026-02-13 - 34 p.
Fulltext: 2511.04747 - PDF; document - PDF;
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2025-11-06
04:15 |
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2025-11-06
04:13 |
Near-extremal membranes in M-theory
/ Buchel, Alex (Western Ontario U.) ; Monten, Ruben (CERN)
We consider near-extremal membranes embedded in M-theory, consistently truncated to gauged $\mathcal{N} = 2$ supergravity in four dimensions on the coset space $M^{1,1,0}$. These are holographically dual to $2 + 1$ dimensional superconformal gauge theory with $U(1)_R \times U(1)_B$ global symmetry. [...]
arXiv:2511.01974; CERN-TH-2025-224.-
2026-02-23 - 31 p.
- Published in : JHEP 2602 (2026) 231
Fulltext: 2511.01974 - PDF; document - PDF;
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