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2025-10-15
04:29
Massive Feynman integrals at high energies: recent analytic results / Zhang, Hantian (CERN)
The high-energy behaviour of scattering amplitudes involving massive particles has attracted interest in recent years. [...]
arXiv:2510.09838 ; CERN-TH-2025-195. - 6 p, 6.
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2025-10-14
10:17
HOPPET v2.0.0 release note / Karlberg, Alexander (CERN) ; Nason, Paolo (INFN, Milan Bicocca ; Milan Bicocca U. (main)) ; Salam, Gavin (U. Oxford (main)) ; Zanderighi, Giulia (Garching, Max Planck Inst. ; Munich, Tech. U.) ; Dreyer, Frédéric (Unlisted, US)
We document the three main new features in release 2.0.0 of the HOPPET parton distribution function evolution code, specifically support for N$^3$LO QCD evolution in the variable flavour number scheme, for the determination of hadronic structure functions for massless quarks up to N$^3$LO, and for QED evolution to an accuracy phenomenologically equivalent to NNLO QCD. [...]
arXiv:2510.09310 ; CERN-TH-2023-237 ; MPP-2023-285 ; OUTP-23-15P. - 31.
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2025-10-11
04:43
Correlation Function/Wilson Loop Duality in Gauge Theory from EFT / Chen, Hao (MIT, Cambridge, CTP) ; Monni, Pier Francesco (CERN) ; Pang, Zhaoyan (Peking U.) ; Vita, Gherardo (CERN) ; Zhu, Hua Xing (Peking U. ; Peking U., CHEP)
In this Letter, we initiate a systematic study of the $n$-point correlation functions (CF) in gauge theories in the sequential light-cone (SLC) limit. [...]
MIT-CTP 5926 ; CERN-TH-2025-104 ; arXiv:2510.07377. - 7.
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2025-10-10
04:47
SymTFT Entanglement and Holographic (Non)-Factorization / Torres, Ethan (CERN) ; Yu, Xingyang (Virginia Tech., Blacksburg)
Given two otherwise decoupled $D$-dimensional CFTs which possess a common (finite) symmetry subcategory, one can consider entangled boundary states of their $(D+1)$-dimensional SymTFTs. [...]
CERN-TH-2025-194 ; arXiv:2510.06319. - 66.
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2025-10-10
04:44
Observables of boundary RG flows from string field theory / Scheinpflug, Jaroslav (Harvard U. (main)) ; Schnabl, Martin (Prague, Inst. Phys. ; CERN) ; Vošmera, Jakub (IPhT, Saclay)
We present simple explicit formulae for the change of the $g$-function, boundary state, boundary spectrum and structure constants between the endpoints of short boundary RG flows at next-to-leading order. [...]
CERN-TH-2025-196 ; arXiv:2510.07155. - 79.
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2025-10-10
04:31
Non-singlet vector current in lattice QCD: $\mathrm{O}(a)$-improvement from large volumes / Harris, Tim (ETH, Zurich (main)) ; Meyer, Harvey B. (CERN ; U. Mainz, PRISMA ; Helmholtz Inst., Mainz)
In previous work, we determined the improvement coefficients $c_\mathrm{V}$ and $c_{\tilde{\mathrm{V}}}$ required for the massless $\mathrm{O}(a)$-improvement of the local and point-split discretizations of the non-singlet vector current for $N_\mathrm{f}=3$ non-perturbatively $\mathrm{O}(a)$-improved Wilson fermions and the Lüscher-Weisz gauge action, using ensembles of large-volume configurations generated by the Coordinated Lattice Simulations (CLS) initiative. [...]
CERN-TH-2025-189 ; MITP-25-060 ; arXiv:2510.06869. - 5.
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2025-10-08
04:09
High-Energy Evolution of Power-Suppressed Amplitudes / Delto, Maximilian (CERN) ; Penin, Alexander (Alberta U.) ; Tancredi, Lorenzo (Munich, Tech. U.)
We present a new class of evolution equations which govern the high-energy behavior of power-suppressed scattering amplitudes. [...]
ALBERTA-THY-3-25 ; CERN-TH-2025-190 ; TUM-HEP-1574/25 ; arXiv:2510.04914. - 7.
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2025-10-08
04:09
Flavour, Accidentally / Banks, Hannah (Cambridge U. (main) ; New York U., CCPP) ; Crawford, Graeme (Glasgow U.) ; McCullough, Matthew (CERN) ; Sutherland, Dave (Glasgow U.)
We propose a new class of flavour models in which the spurion which breaks Standard Model flavour symmetries transforms in a non-minimal representation. [...]
CERN-TH-2025-157 ; arXiv:2510.03403. - 5.
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2025-10-07
04:23
A Limit on the Total Lepton Number in the Universe from BBN and the CMB / Domcke, Valerie (CERN) ; Escudero, Miguel (CERN) ; Fernandez Navarro, Mario (Glasgow U.) ; Sandner, Stefan (Los Alamos)
At temperatures below the QCD phase transition, any substantial lepton number in the Universe can only be present within the neutrino sector. [...]
CERN-TH-2025-192 ; LA-UR-25-29666 ; arXiv:2510.02438. - 15.
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2025-09-27
04:05
Scalar Amplitudes from Fibre Bundle Geometry / Alminawi, Mohammad (Zurich U.) ; Brivio, Ilaria (Zurich U. ; Bologna U. ; INFN, Bologna) ; Davighi, Joe (CERN)
We compute tree-level $n$-point scattering amplitudes in scalar field theories in terms of geometric invariants on a fibre bundle. [...]
COMETA-2025-38 ; CERN-TH-2025-187 ; arXiv:2509.20482. - 7.
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