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2026-05-21
21:23
$B_c \to \eta_c$ form factors at large recoil: SCET analysis and a three-loop consistency check / Bell, Guido (Siegen U.) ; Böer, Philipp (CERN) ; Feldmann, Thorsten (Siegen U.) ; Horstmann, Dennis (Siegen U. ; KIT, Karlsruhe) ; Shtabovenko, Vladyslav (Siegen U.)
The double-logarithmic series of non-relativistic $B_c \to η_c$ form factors at large recoil is governed by a coupled set of integral equations, reflecting an intricate interplay between arbitrarily many soft-quark and soft-gluon exchanges. [...]
CERN-TH-2026-111 ; SI-HEP-2025-20 ; P3H-26-040 ; TTP26-017 ; arXiv:2605.21314. - 40.
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2026-05-21
21:23
A missing link: Brane networks and the Cobordism Conjecture / Dierigl, Markus (Princeton U.) ; Ruiz, Ignacio (Princeton U.)
The absence of global symmetries in a quantum gravity theory often requires the introduction of (new) symmetry-breaking defects, which appear as singular objects in the low-energy description. [...]
CERN-TH-2026-108 ; arXiv:2605.18952. - 24.
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2026-05-19
04:13
Walking Sudakov: From Cusp to Octagon / Alday, Luis F. (Oxford U., Inst. Math.) ; Armanini, Elisabetta (CERN ; EPFL, Lausanne, FSL) ; Belitsky, Andrei V. (Arizona State U.) ; Häring, Kelian (Delta ITP, Amsterdam) ; Zhiboedov, Alexander (CERN)
We study the Sudakov form factor and the four-point scattering amplitude on the Coulomb branch of planar $\mathcal{N}=4$ SYM as functions of the Coulomb-branch parameters and kinematic invariants. [...]
CERN-TH-2026-109 ; arXiv:2605.16034. - 43.
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2026-05-19
04:10
Bordisms between 9d type IIB supergravities and commutator widths of duality groups / las Heras, Camilo (Valparaiso U.) ; Ruiz, Ignacio (CERN)
We study the topological properties of bordisms interpolating between different 9d gauged supergravities obtained from compactification of type IIB string theory on $\mathbb{S}^1$ with a non-trivial $\mathsf{SL}(2,\mathbb{Z})$ bundle. [...]
arXiv:2605.15276 ; CERN-TH-2026-107. - 83.
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2026-05-13
04:43
Non-factorisable electroweak virtual corrections to single-resonant processes / Ahmadova, Fazila (Zurich U.) ; Buonocore, Luca (CERN) ; Grazzini, Massimiliano (Zurich U.) ; Savoini, Chiara (Munich, Tech. U.)
We consider electroweak (EW) virtual corrections to $2\to 2$ fermion scattering processes mediated by a vector boson $V$ ($V=W^\pm,Z$) in the pole approximation. [...]
ZU-TH 16/26 ; TUM-HEP-1603/26 ; CERN-TH-2026-103 ; arXiv:2605.09444. - 30.
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2026-05-12
04:10
Neural Operators as Efficient Function Interpolators / Niarchos, Vasilis ; Sirbu, Angelos ; Trifinopoulos, Sokratis
Neural operators (NOs) are designed to learn maps between infinite-dimensional function spaces. [...]
CERN-TH-2026-096 ; CCTP-2026-8 ; ITCP-2026-8 ; arXiv:2605.07792. - 12.
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2026-05-09
04:02
Perturbative, Nonperturbative and Exact Aspects of Crystalline Phases in the Gross-Neveu Model / Benini, Francesco (SISSA, Trieste ; INFN, Trieste) ; Mamroud, Ohad (SISSA, Trieste ; INFN, Trieste) ; Reis, Tomas (CERN) ; Serone, Marco (SISSA, Trieste ; INFN, Trieste)
We study the crystalline phase of the $O(2N)$ Gross--Neveu model with a chemical potential for $a \leq N-2$ of the fermions. [...]
CERN-TH-2026-102 ; arXiv:2605.05307. - 61.
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2026-05-08
04:09
Heterotic String Theory Suggests a QCD Axion Near 0.5 neV / Benabou, Joshua N. (LBL, Berkeley ; UC, Berkeley) ; Dainelli, Giulio Alvise (LBL, Berkeley ; UC, Berkeley) ; Reig, Mario (CERN) ; Safdi, Benjamin R. (LBL, Berkeley ; UC, Berkeley)
We show that in heterotic string theory -- and dual corners of the landscape including Type I string theory -- the QCD axion mass is bounded from below by $m_a \gtrsim 0.5$ neV, a direct consequence of the model-independent axion whose decay constant is fixed by the grand unified theory (GUT) gauge coupling. [...]
CERN-TH-2026-098 ; arXiv:2605.04142. - 42.
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2026-05-08
04:03
Are PTA measurements sensitive to gravitational wave non-Gaussianities? / Cecchini, Chiara (Trento U. ; TIFPA-INFN, Trento ; Madrid, Inst. Estructura Materia) ; El Gammal, Jonas (Insubria U., Como) ; Franciolini, Gabriele (Padua U. ; INFN, Padua) ; Pieroni, Mauro (Madrid, Inst. Estructura Materia)
Observing non-Gaussianity in the timing residuals of Pulsar Timing Arrays (PTAs) has recently attracted attention as a potential discriminator between astrophysical and cosmological origins of the observed Gravitational Wave (GW) signal. [...]
CERN-TH-2025-241 ; arXiv:2605.05157. - 11.
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2026-05-06
04:44
Studying the Infrared Behaviour of Improved Logarithmic Accuracy Parton Showers with Herwig / Holguin, Jack (Manchester U.) ; Plätzer, Simon (Graz U. ; Vienna U.) ; Seymour, Michael H. (Manchester U. ; CERN) ; Sule, Siddharth (Manchester U.)
We have implemented two recently proposed dipole shower algorithms that have next-to-leading-logarithmic accuracy at leading colour in the Herwig event generator. [...]
CERN-TH-2026-101 ; MCNET-26-09 ; arXiv:2605.02622. - 46.
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