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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. We obtain analytic results for the color-planar contributions, for the contributions of light-quark loops, and the contributions with two heavy-quark loops. [...]
arXiv:2406.08182; CERN-TH-2024-064; P3H-24-036; PSI-PR-24-13; SI-HEP-2024-14; TTP24-017; SI-HEP-2024-14,
TTP24-017; ZU-TH28/24.-
2024-09-01 - 51 p.
- Published in : Phys. Rev. D 110 (2024) 056011
Fulltext: PDF;
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NNLO QCD corrections to the q$^{2}$ spectrum of inclusive semileptonic B-meson decays
/ Fael, Matteo (CERN) ; Herren, Florian (Zurich U.)
We calculate the next-to-next-to-leading order QCD corrections to the leptonic invariant mass ($q^2$) spectrum of semileptonic $b \to c$ inclusive decays, taking into account the mass of the charm quark and the charged lepton in the final state. We obtain analytic results in terms of generalized polylogarithms and present numerical studies of the $\mathcal{O}(\alpha_s^2)$ corrections to the $q^2$ spectrum of $b \to c \ell \bar \nu_\ell$ decays, for $\ell =e, \mu$ and $\tau$, in the kinetic scheme. [...]
arXiv:2403.03976; CERN-TH-2024-025; ZU-TH 14/24.-
2024-05-24 - 19 p.
- Published in : JHEP 2405 (2024) 287
Fulltext: document - PDF; 2403.03976 - PDF;
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Computing tools for effective field theories: SMEFT-Tools 2022 Workshop Report, 14–16th September 2022, Zürich
/ Aebischer, Jason (ed.) (Zurich U.) ; Fael, Matteo (ed.) (CERN) ; Fuentes-Martín, Javier (ed.) (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) ; Thomsen, Anders Eller (ed.) (Basel U.) ; Virto, Javier (ed.) (U. Barcelona (main) ; Barcelona U. ; ICC, Barcelona U.) ; Allwicher, Lukas (Zurich U.) ; Das Bakshi, Supratim (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) ; Bélusca-Maïto, Hermès (Zagreb U., Phys. Dept.) ; de Blas, Jorge (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) ; Chala, Mikael (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) et al.
In recent years, theoretical and phenomenological studies with effective field theories have become a trending and prolific line of research in the field of high-energy physics. In order to discuss present and future prospects concerning automated tools in this field, the SMEFT-Tools 2022 workshop was held at the University of Zurich from 14th-16th September 2022. [...]
arXiv:2307.08745.-
2024-02-19 - 115 p.
- Published in : Eur. Phys. J. C 84 (2024) 170
Fulltext: 2307.08745 - PDF; document - PDF;
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Three-loop $b\to s\gamma$ vertex with current-current operators
/ Fael, Matteo (CERN) ; Lange, Fabian (KIT, Karlsruhe, TTP ; KIT, Karlsruhe, IAP) ; Schönwald, Kay (Zurich U.) ; Steinhauser, Matthias (KIT, Karlsruhe, TTP)
We compute three-loop vertex corrections to $b\to s\gamma$ induced by current-current operators. The results are presented as expansions in $m_c/m_b$ with numerical coefficients which allow to cover all relevant values for the heavy quark masses in different renormalization schemes. [...]
arXiv:2309.14706; CERN-TH-2023-148; P3H-23-059; TTP23-035; ZU-TH 56/23.-
2023-11-23 - 21 p.
- Published in : JHEP 2311 (2023) 166
Fulltext: 2309.14706 - PDF; Publication - PDF;
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New physics contributions to moments of inclusive b → c semileptonic decays
/ Fael, Matteo (KIT, Karlsruhe, TTP ; CERN) ; Rahimi, Muslem (Siegen U.) ; Vos, K. Keri (Maastricht U. ; Nikhef, Amsterdam)
Inclusive semileptonic $B\to X_c \ell \bar{\nu}_\ell$ decays, where $\ell = \mu,e$, are by now standard candles in the determination of the CKM element $|V_{cb}|$. These determinations rely on the heavy-quark expansion and use moments of decay spectra to extract the non-perturbative parameters directly from data under the standard model assumption. [...]
arXiv:2208.04282; P3H-22-090; SI-HEP-2022-21; TTP22-056; Nikhef 2022-010.-
2023-02-08 - 29 p.
- Published in : JHEP 02 (2023) 086
Fulltext: 2208.04282 - PDF; Publication - PDF;
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