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
Fulltext: PDF;
In : 42th International Symposium on Lattice Field Theory (Lattice 2025), Mumbai, India, 2 - 8 Nov 2025
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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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2026-01-06
04:12 |
Deforming and dissecting AdS$_3$ with matter
/ Callebaut, Nele (Cologne U.) ; Hergueta, Blanca (Cologne U.) ; Monten, Ruben (CERN) ; Selle, Matteo (Cologne U.)
We study deformations of the model by Henneaux, Martínez, Troncoso and Zanelli [arXiv:hep-th/0201170] which features asymptotically AdS$_3$ black hole solutions that incorporate the exact backreaction of a scalar field. The presence of bulk matter causes the $T \overline T$ deformation of the (putative) dual CFT$_2$ to differ from the deformation defined in the bulk by imposing Dirichlet boundary conditions at finite radius. [...]
arXiv:2512.21255; CERN-TH-2025-268.-
2026-04-02 - 38 p.
- Published in : JHEP 2604 (2026) 031
Fulltext: 2512.21255 - PDF; document - PDF;
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2025-12-17
04:44 |
The heavy quark-antiquark asymmetry in the variable flavor number scheme
/ Behring, A. (Garching, Max Planck Inst.) ; Blümlein, J. (DESY ; Dortmund U.) ; De Freitas, A. (Linz U., RISC) ; von Manteuffel, A. (Regensburg U.) ; Schneider, C. (Linz U., RISC) ; Schönwald, K. (CERN)
The twist-2 heavy-quark and antiquark distributions, as defined in the variable flavor number scheme, turn out to be different due to QCD corrections from three-loop onward. This is caused by terms containing the color factor $d_{abc} d^{abc}$ in the heavy-flavor massive pure-singlet operator matrix elements (OMEs) $A^{\rm PS, s, (3)}_{Qq}$ for odd moments in the unpolarized case and for $ΔA^{\rm PS, s, (3)}_{Qq}$ for even moments in the polarized case. [...]
arXiv:2512.13508; DESY 25-185; CERN-TH-2025-259; MPP-2025-227; RISC Report series 25-10.-
2026-04-01 - 17 p.
- Published in : Phys. Lett. B 876 (2026) 140411
Fulltext: PDF;
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2025-12-05
04:51 |
Jet Production at NNLO: Exploring a New Scheme
/ Buonocore, Luca (CERN) ; Grazzini, Massimiliano (U. Zurich (main)) ; Guadagni, Flavio (U. Zurich (main)) ; Haag, Jürg (U. Bern, AEC) ; Kallweit, Stefan (Zurich U.) ; Rottoli, Luca (Milan Bicocca U. ; INFN, Milan Bicocca)
We consider dijet production in $e^+e^-$ collisions and in $H\to b{\bar b}$ decays at next-to-next-to-leading order (NNLO) in perturbative QCD. A new non-local subtraction scheme is applied, for the first time, to obtain the fully differential cross section for these benchmark processes. [...]
arXiv:2512.03954; ZU-TH 83/25; CERN-TH-2025-232.-
2026-04-02 - 25 p.
- Published in : JHEP 2604 (2026) 023
Fulltext: 2512.03954 - 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 |
Notice détaillée
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2025-11-15
04:21 |
Notice détaillée
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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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