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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

Úplný záznam
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

Úplný záznam
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;

Úplný záznam
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;

Úplný záznam
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;

Úplný záznam
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;

Úplný záznam
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;

Úplný záznam
2025-11-21
04:10
The quark jet function for $k_T$-like variables in NNLO QCD / Buonocore, Luca (CERN) ; Grazzini, Massimiliano (Zurich U.) ; Guadagni, Flavio (Zurich U.) ; Haag, Jürg (U. Bern, AEC) ; Rottoli, Luca (Milan Bicocca U. ; INFN, Milan Bicocca)
The precise description of jet processes requires observables capable of efficiently capturing the dynamics of the energy flow in hadronic final states. We consider a class of tranverse-momentum like resolution variables that smoothly describe the $n+1$ to $n$ jet transition in multi-jet processes. [...]
arXiv:2508.19226; ZU-TH 54/25; CERN-TH-2025-167.- 2025-11-12 - 20 p. - Published in : Eur. Phys. J. C 85 (2025) 1290 Fulltext: document - PDF; 2508.19226 - PDF;

Úplný záznam
2025-11-15
04:21
Bounds on Discrete Gauge Symmetries in Supergravity / Baykara, Zihni Kaan (Harvard U. (main)) ; Dierigl, Markus (CERN) ; Kim, Hee-Cheol (POSTECH, Pohang) ; Vafa, Cumrun (Harvard U. (main)) ; Xu, Kai (Harvard U. (main))
We place bounds on the order of enhanced discrete gauge symmetries that act on massless fields and thus arise at subloci of the moduli space in supergravity theories. We focus on supersymmetric theories with 8 or more supercharges which in some cases lead to sharp upper bounds realized by specific string constructions..
arXiv:2511.09613; CERN-TH-2025-233.- 2026-03-18 - 31 p. - Published in : JHEP 2603 (2026) 171 Fulltext: 2511.09613 - PDF; document - PDF;

Úplný záznam
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;

Úplný záznam