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2024-06-18
06:14
The impact of a primordial gravitational wave background on LISA resolvable sources / Braglia, Matteo (New York U., CCPP) ; Pieroni, Mauro (CERN ; L2IT, Toulouse) ; Marsat, Sylvain (L2IT, Toulouse)
The existence of a primordial stochastic gravitational wave background (SGWB) is a common prediction in various models of the early Universe. [...]
CERN-TH-2024-073 ; arXiv:2406.10048.
- 15 p.
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2024-06-18
05:02
New strategies for probing $B\to D^\ast \ell\bar\nu_\ell$ lattice and experimental data / Bordone, Marzia (CERN) ; Juttner, Andreas (Southampton U. ; CERN)
We present an analysis of the exclusive semileptonic decay $B\to D^\ast \ell\bar\nu_\ell$ based on the Belle and Belle II data made public in 2023, combined with recent lattice-QCD calculations of the hadronic transition form factors by FNAL/MILC, HPQCD and JLQCD. [...]
CERN-TH-2024-083 ; arXiv:2406.10074.
- 35 p.
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2024-06-14
06:02
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.
- 51 p.
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2024-06-13
06:49
Scaling violation in power corrections to energy correlators from the light-ray OPE / Chen, Hao (Zhejiang U., Inst. Mod. Phys.) ; Monni, Pier Francesco (King's Coll. London ; CERN) ; Xu, Zhen (Zhejiang U., Inst. Mod. Phys.) ; Zhu, Hua Xing (Peking U. ; Maryland U. ; Peking U., CHEP)
In recent years, energy correlators have emerged as a powerful tool to explore the field theoretic structure of strong interactions at particle colliders. [...]
CERN-TH-2024-084 ; arXiv:2406.06668.
- 5 p.
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2024-06-13
06:39
$(J/\psi, J/\psi)$, and $(\eta_c, \eta_c)$ production through two intermediate photons in electron-positron annihilation at B-factories / Bhatnagar, Shashank (Delhi U.) ; Negash, Hluf (Samara U.)
We study the processes, $e^- e^+ \rightarrow \gamma^* \gamma^* \rightarrow J/\psi +J/\psi$, and $e^- e^+ \rightarrow \gamma^* \gamma^* \rightarrow \eta_c+ \eta_c$ at $\sqrt{s}=10.6$ GeV in the framework of $4\times 4$ Bethe-Salpeter equation. [...]
CERN-TH-2024-081 ; arXiv:2406.07508.
- 14 p.
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2024-06-12
04:50
Self-interacting dark matter solves the final parsec problem of supermassive black hole mergers / Alonso-Álvarez, Gonzalo (Toronto U. ; McGill U.) ; Cline, James M. (McGill U. ; CERN) ; Dewar, Caitlyn (McGill U.)
Evidence for a stochastic gravitational wave (GW) background, plausibly originating from the merger of supermassive black holes (SMBHs), is accumulating with observations from pulsar timing arrays. [...]
arXiv:2401.14450 ; CERN-TH-2024-016.
- 5 p.
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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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2024-06-11
04:44
An event generator for Lepton-Hadron Deep Inelastic Scattering at NLO+PS with POWHEG including mass effects / Buonocore, Luca (CERN) ; Limatola, Giovanni (Turin U.) ; Nason, Paolo (INFN, Milan Bicocca ; Munich, Max Planck Inst.) ; Tramontano, Francesco (CERN ; Naples U.)
We present a generator for lepton nucleon collisions in the DIS regime, focusing in particular on processes with a massive lepton and/or a massive quark in the final state. [...]
arXiv:2406.05115 ; CERN-TH-2024-070.
- 51 p.
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2024-06-08
04:56
Recursion for Wilson-line Form Factors / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; U. Oregon, Eugene (main)) ; Riembau, Marc (CERN)
Matrix elements of Wilson-line dressed operators play a central role in the factorization of soft and collinear modes in gauge theories. [...]
arXiv:2406.03540 ; CERN-TH-2024-069.
- 28 p.
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2024-06-07
04:42
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.
- 19 p.
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