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2026-03-20
04:17
The gravitational S-matrix from the path integral: asymptotic symmetries and soft theorems / Isen, Jack (UCLA, Los Angeles (main)) ; Kraus, Per (UCLA, Los Angeles (main)) ; Monten, Ruben (CERN) ; Myers, Richard M. (Amsterdam U.)
We extend a previously developed formulation of the S-matrix, based on a path integral with asymptotic boundary conditions, to include gravity. [...]
CERN-TH-2026-044 ; arXiv:2603.17045. - 59.
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2026-03-20
04:17
$K π$ scattering as a step towards $B \to K^* \ell^+ \ell^-$ from Lattice QCD / Erben, Felix (CERN) ; Black, Matthew (U. Edinburgh (main)) ; Boyle, Peter (Brookhaven Natl. Lab. ; U. Edinburgh (main)) ; Di Carlo, Matteo (CERN) ; Gülpers, Vera (U. Edinburgh (main)) ; Hansen, Maxwell T. (U. Edinburgh (main)) ; Lachini, Nelson Pitanga (Cambridge U. (main)) ; Mukherjee, Rajnandini (U. Edinburgh (main)) ; Portelli, Antonin (U. Edinburgh (main)) ; Tsang, J. Tobias (U. Liverpool (main))
Rare $b\to s\ell^+\ell^-$ decays provide some of the most sensitive tests of the Standard Model and require precise and systematically improvable hadronic input from lattice QCD. [...]
CERN-TH-2026-053 ; arXiv:2603.17900. -
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2026-03-19
04:06
Shocks from Exploding Primordial Black Holes in the Early Universe / Vanvlasselaer, Miguel (Brussels U., IIHE ; U. Barcelona (main)) ; Trifinopoulos, Sokratis (MIT ; CERN ; Zurich U.) ; Klipfel, Alexandra P. (MIT) ; Kaiser, David I. (MIT)
We investigate how Hawking radiation from low-mass primordial black holes deposits energy into the early-universe plasma and show that the resulting phenomena are hydrodynamic rather than purely diffusive. [...]
CERN-TH-2026-048 ; MIT-CTP/5978 ; arXiv:2603.15746. - 34.
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2026-03-19
04:01
The photon-energy spectrum in $B\to X_sγ$ to N$^3$LO: light-fermion and large-$N_{\rm c}$ corrections / Fael, Matteo (U. Padua (main) ; INFN, Padua) ; Lange, Fabian (Zurich U. ; PSI, Villigen) ; Schönwald, Kay (CERN) ; Steinhauser, Matthias (KIT, Karlsruhe)
We calculate the photon-energy spectrum of the inclusive radiative decay $B\to X_sγ$, induced by the electromagnetic dipole operator $O_7$, to next-to-next-to-next-to-leading order and consider the complete corrections for light fermions, for the contributions with two closed massive fermion loops, and for the limit of large QCD colour factors $N_{\rm c}$ in the remaining part. [...]
CERN-TH-2026-049 ; P3H-26-018 ; TTP26-007 ; ZU-TH 11/26 ; arXiv:2603.15751. - 38.
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2026-03-19
04:01
$gg \to ZH$ at NLO matched to parton showers with ggxy and POWHEG / Davies, Joshua (U. Liverpool (main)) ; Schönwald, Kay (CERN) ; Steinhauser, Matthias (KIT, Karlsruhe) ; Stremmer, Daniel (KIT, Karlsruhe)
We implement the recently-calculated analytic expressions for the next-to-leading order QCD corrections to $gg\to ZH$ in ggxy. [...]
CERN-TH-2026-051 ; P3H-26-019 ; TTP26-008 ; arXiv:2603.15762. - 23.
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2026-03-18
04:42
Standard Model tests with smeared experiment and theory / Jüttner, Andreas (CERN ; Southampton U.)
For Standard Model processes in which on-shell intermediate hadronic states contribute - including inclusive semileptonic decays and long-distance effects in rare exclusive decays such as $D\to π\ell\ell$ and $B\to K^{(\ast)}\ell\ell$ - spectral-reconstruction techniques provide a promising route to model-independent lattice QCD predictions for use in phenomenological predictions. [...]
CERN-TH-2026-050 ; arXiv:2603.15487. - 25.
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2026-03-17
04:09
Factorization Beyond Coherence / Becher, Thomas (U. Bern (main)) ; Hager, Patrick (CERN) ; Neubert, Matthias (U. Mainz, PRISMA ; Cornell U., LEPP) ; Schwienbacher, Dominik (U. Bern (main))
We derive a novel factorization theorem for $N$-jettiness at hadron colliders, which incorporates coherence-violating effects induced by Glauber gluons and several new momentum modes. [...]
CERN-TH-2026-039 ; MITP-26-008 ; arXiv:2603.12383. - 8.
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2026-03-14
04:38
Alice in Warpland: KK modes, Warped Compactifications and the Swampland / Raucci, Salvatore (Madrid, IFT ; Madrid, Autonoma U.) ; Ruiz, Ignacio (CERN) ; Valenzuela, Irene (Madrid, IFT ; Madrid, Autonoma U. ; CERN)
We investigate the asymptotic behavior of Kaluza-Klein (KK) towers in warped compactifications to Minkowski space. [...]
IFT-UAM/CSIC-26-22 ; CERN-TH-2026-040 ; arXiv:2603.11163. - 75.
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2026-03-14
04:38
Scale-Dependent Loop Corrections to the Inflationary Power Spectrum / Braglia, Matteo (CERN) ; Céspedes, Sebastián (Imperial Coll., London) ; Pinol, Lucas (LPENS, Paris ; LJLL, Paris)
Loop corrections to primordial correlation functions are unavoidable due to the non-linear nature of gravity. [...]
CERN-TH-2026-038 ; arXiv:2603.12216. - 26.
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2026-03-12
04:14
Renormalisation and matching of massless scalar correlation functions in Soft de Sitter Effective Theory / Beneke, Martin (Munich, Tech. U.) ; Hager, Patrick (CERN) ; Sanfilippo, Andrea F. (Granada U.)
For light and massless scalar fields, cosmological correlation functions suffer from infrared divergences and secular logarithms. [...]
TUM-HEP-1592/26 ; CERN-TH-2026-020 ; arXiv:2603.09438. - 75.
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