2024-06-14 06:02 |
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Heavy-to-light form factors to three loops
/ Fael, Matteo (CERN) ; Huber, Tobias (Siegen U.) ; Lange, Fabian (Zurich U. ; PSI, Villigen) ; Müller, Jakob (Siegen U.) ; Schönwald, Kay (Zurich U.) ; Steinhauser, Matthias (KIT, Karlsruhe, TTP)
We compute three-loop corrections of $\mathcal{O}(\alpha_{s}^3)$ to form factors with one massive and one massless quark coupling to an external vector, axialvector, scalar, pseudoscalar, or tensor current. [...]
CERN-TH-2024-064 ; P3H-24-036 ; PSI-PR-24-13 ; SI-HEP-2024-14,
TTP24-017 ; ZU-TH28/24 ; arXiv:2406.08182.
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51 p.
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2024-06-08 04:56 |
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2024-06-07 04:42 |
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A new standard for the logarithmic accuracy of parton showers
/ van Beekveld, Melissa (Nikhef, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Monash U.) ; Ferrario Ravasio, Silvia (CERN) ; Hamilton, Keith (University Coll. London) ; Helliwell, Jack (Oxford U., Theor. Phys.) ; Karlberg, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; U. Oxford (main)) ; Scyboz, Ludovic (Monash U.) et al.
We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. [...]
arXiv:2406.02661 ; CERN-TH-2024-057 ; OUTP-24-03P.
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19 p.
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2024-06-07 04:40 |
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