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CERN Accelerating science

CERN-TH

Letzte Einträge:
2024-06-22
07:40
Candidate de Sitter Vacua / McAllister, Liam (Cornell U., Phys. Dept.) ; Moritz, Jakob (Princeton U.) ; Nally, Richard (Cornell U., Phys. Dept.) ; Schachner, Andreas (Cornell U., Phys. Dept. ; Munich U., ASC)
We construct compactifications of type IIB string theory that yield, at leading order in the $\alpha^\prime$ and $g_s$ expansions, de Sitter vacua of the form envisioned by Kachru, Kallosh, Linde, and Trivedi. [...]
CERN-TH-2024-090 ; arXiv:2406.13751.
- 64 p.
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2024-06-22
07:34
LO, NLO, and NNLO Parton Distributions for LHC Event Generators / Cruz-Martinez, Juan (CERN) ; Forte, Stefano (INFN, Milan ; Milan U.) ; Laurenti, Niccolo (INFN, Milan ; Milan U.) ; Rabemananjara, Tanjona R. (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam)
We present NNPDF4.0MC, a variant of the NNPDF4.0 set of parton distributions (PDFs) at LO, NLO and NNLO, with and without inclusion of the photon PDF, suitable for use with Monte Carlo (MC) event generators, which require PDFs to satisfy additional constraints in comparison to standard PDF sets. [...]
CERN-TH-2024-080 ; TIF-UNIMI-2024-4 ; arXiv:2406.12961.
- 14 p.
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2024-06-19
04:53
A Double Copy of Geometry / Helset, Andreas (CERN)
We propose an extension of the color-kinematics duality for nonlinear sigma models with nonsymmetric cosets. [...]
CERN-TH-2024-086 ; arXiv:2406.10955.
- 5 p.
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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) ; 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. [...]
arXiv:2406.10048 ; CERN-TH-2024-073.
- 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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