2024-06-12
04:50 |
The non-first-order-factorizable contributions to the three-loop single-mass operator matrix elements <math altimg="si1.svg"><msubsup><mrow><mi>A</mi></mrow><mrow><mi>Q</mi><mi>g</mi></mrow><mrow><mo stretchy="false">(</mo><mn>3</mn><mo stretchy="false">)</mo></mrow></msubsup></math> and <math altimg="si2.svg"><mi mathvariant="normal">Δ</mi><msubsup><mrow><mi>A</mi></mrow><mrow><mi>Q</mi><mi>g</mi></mrow><mrow><mo stretchy="false">(</mo><mn>3</mn><mo stretchy="false">)</mo></mrow></msubsup></math>
/ Ablinger, J. (Linz U. ; Linz U., RISC ; OAW, Linz, RICAM) ; Behring, A. (CERN) ; Blümlein, J. (DESY, Zeuthen ; Dortmund U.) ; De Freitas, A. (Linz U. ; Linz U., RISC ; DESY, Zeuthen) ; von Manteuffel, A. (Regensburg U.) ; Schneider, C. (Linz U. ; Linz U., RISC) ; Schönwald, K. (Zurich U.)
The non-first-order-factorizable contributions (The terms 'first-order-factorizable contributions' and 'non-first-order-factorizable contributions' have been introduced and discussed in Refs. \cite{Behring:2023rlq,Ablinger:2023ahe}. [...]
arXiv:2403.00513; ZU-TH-13/24; DO-TH-23/15; RISC Report series 24-02; CERN-TH-2024-30; DESY-24-027.-
2024-05-13 - 8 p.
Fulltext: 2403.00513 - PDF; Publication - PDF;
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2024-03-21
05:42 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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2024-03-09
04:15 |
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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2024-02-13
04:27 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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2024-02-07
04:19 |
Collapsing Domain Wall Networks: Impact on Pulsar Timing Arrays and Primordial Black Holes
/ Ferreira, Ricardo Z. (Coimbra U.) ; Notari, Alessio (ICC, Barcelona U. ; GGI, Florence ; INFN, Florence) ; Pujolàs, Oriol (BIST, Barcelona) ; Rompineve, Fabrizio (ICC, Barcelona U. ; BIST, Barcelona ; CERN)
Unstable domain wall (DW) networks in the early universe are cosmologically viable and can emit a large amount of gravitational waves (GW) before annihilating. As such, they provide an interpretation for the recent signal reported by Pulsar Timing Array (PTA) collaborations. [...]
arXiv:2401.14331; CERN-TH-2024-020.-
2024-06-11 - 16 p.
- Published in : JCAP 2406 (2024) 020
Fulltext: document - PDF; 2401.14331 - PDF;
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2024-02-02
04:45 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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2024-01-31
04:41 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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2024-01-27
04:33 |
Astrophysical Axion Bounds: The 2024 Edition
/ Caputo, Andrea ; Raffelt, Georg
We review the current status of astrophysical bounds on QCD axions, primarily based on the observational effects of nonstandard energy losses on stars, including black-hole superradiance. Over the past few years, many of the traditional arguments have been reexamined both theoretically and using modern data and new ideas have been put forth. [...]
arXiv:2401.13728; MPP-2024-13; CERN-TH-2024-013.-
2024-03-11 - 81 p.
- Published in : 10.22323/1.454.0041
Fulltext: document - PDF; 2401.13728 - PDF;
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2024-01-27
04:30 |
Geometry of the spectral parameter and renormalisation of integrable sigma-models
/ Lacroix, Sylvain (ETH, Zurich (main)) ; Wallberg, Anders (CERN ; Ecole Polytechnique, Lausanne ; Zurich, ETH)
In the past few years, the unifying frameworks of 4-dimensional Chern-Simons theory and affine Gaudin models have allowed for the systematic construction of a large family of integrable $\sigma$-models. These models depend on the data of a Riemann surface $C$ (here of genus 0 or 1) and of a meromorphic 1-form $\omega$ on $C$, which encodes the geometry of their spectral parameter and the analytic structure of their Lax connection. [...]
arXiv:2401.13741; CERN-TH-2024-008.-
2024-05-09 - 62 p.
- Published in : JHEP 2405 (2024) 108
Fulltext: document - PDF; 2401.13741 - PDF;
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2024-01-24
06:08 |
Hadronic vacuum polarization in the muon $g-2$: The short-distance contribution from lattice QCD
/ Kuberski, Simon (CERN) ; Cè, Marco (INFN, Milan Bicocca) ; von Hippel, Georg (U. Mainz, PRISMA) ; Meyer, Harvey B. (U. Mainz, PRISMA ; Mainz U., Inst. Phys. ; Darmstadt, GSI) ; Ottnad, Konstantin (U. Mainz, PRISMA) ; Risch, Andreas (Wuppertal U. ; NIC, Zeuthen ; DESY, Zeuthen) ; Wittig, Hartmut (U. Mainz, PRISMA ; Mainz U., Inst. Phys. ; Darmstadt, GSI)
We present results for the short-distance window observable of the hadronic vacuum polarization contribution to the muon $g-2$, computed via the time-momentum representation (TMR) in lattice QCD. A key novelty of our calculation is the reduction of discretization effects by a suitable subtraction applied to the TMR kernel function, which cancels the leading $x_0^4$-behaviour at short distances. [...]
arXiv:2401.11895; MITP-24-011; CERN-TH-2024-011.-
2024-03-29 - 36 p.
- Published in : JHEP 2403 (2024) 172
Fulltext: 2401.11895 - PDF; document - PDF;
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