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CP violation in $K\toμ^+μ^-$ with and without time dependence through a tagged analysis
/ D'Ambrosio, Giancarlo (INFN, Naples) ; Dery, Avital (CERN) ; Grossman, Yuval (Cornell U., LEPP) ; Kitahara, Teppei (Chiba U. ; KMI, Nagoya ; Nagoya U.) ; Marchevski, Radoslav (EPFL, Lausanne, LPPC) ; Martínez Santos, Diego (U. A Coruna) ; Schacht, Stefan (Durham U., IPPP)
We point out that using current knowledge of ${\cal B}(K^0_L\toμ^+μ^-)$ and $ {\cal B}(K^0_L\to γγ)$, one can extract short-distance information from the combined measurement of the time-integrated CP asymmetry, $A_{\rm CP}(K^0\toμ^+μ^-)$, and of ${\cal B}(K^0_S\toμ^+μ^-)$. [...]
CERN-TH-2025-047 ; CHIBA-EP-272 ; IPPP/25/46 ; arXiv:2507.13445.
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Experimental Study of Rare Kaon Decays at J-PARC with KOTO and KOTO II
/ KOTO Collaboration
The rare kaon decay $K_L\to\pi^0\nu\bar{\nu}$ is extremely sensitive to new physics, because the contribution to this decay in the Standard Model (SM) is highly suppressed and known very accurately; the branching ratio is $3\times 10^{-11}$ in the SM with a theoretical uncertainty of just 2%. [...]
arXiv:2505.02568.
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Kaon Physics: A Cornerstone for Future Discoveries
/ Aebischer, Jason (CERN) ; Akmete, Atakan Tugberk (U. Mainz, PRISMA) ; Aliberti, Riccardo (Mainz U., Inst. Kernphys.) ; Altmannshofer, Wolfgang (UC, Santa Cruz ; UC, Santa Cruz, Inst. Part. Phys.) ; Ambrosino, Fabio (Naples U. ; INFN, Naples ; SSM, Naples) ; Ammendola, Roberto (INFN, Rome2) ; Antonelli, Antonella (Frascati) ; Anzivino, Giuseppina (Perugia U. ; INFN, Perugia) ; Ashanujjaman, Saiyad (KIT, Karlsruhe, TTP ; KIT, Karlsruhe) ; Bandiera, Laura (INFN, Ferrara) et al.
The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovation in high-energy physics (HEP). [...]
arXiv:2503.22256 ; CERN-TH-2025-066.
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Kaon rare decays: theory overview
/ Neshatpour, Siavash (IP2I, Lyon) ; D'Ambrosio, Giancarlo (INFN, Naples) ; Iyer, Abhishek (Indian Inst. Tech., New Delhi) ; Mahmoudi, Farvah (IP2I, Lyon ; CERN ; IUF, Paris)
/ATLAS Collaboration
In this proceeding, we review the current theoretical landscape of rare Kaon decays, focusing specifically on flavor-changing neutral current processes. These decays provide valuable indirect avenues for exploring new physics. [...]
CERN-TH-2024-034.-
2024 - 6 p.
- Published in : PoS WIFAI 2023 (2024) 026
Fulltext: PDF;
In : Workshop Italiano sulla Fisica ad Alta Intensita (WIFAI 2023), Rome, Italy, 8 - 10 Nov 2023, pp.026
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Review of particle physics, 2024-2025
/ Particle Data Group Collaboration
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons [...]
2024 - 1166 p.
- Published in : Phys. Rev. D 110 (2024) 030001
Fulltext: PDF;
Purchase it for me!
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Exploring scalar contributions with $K^+ \to \pi^+ \ell^+ \ell^-$
/ D'Ambrosio, G. (INFN, Naples) ; Iyer, A.M. (Indian Inst. Tech., New Delhi) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris) ; Neshatpour, S. (IP2I, Lyon)
The rare kaon decay $K^+ \to \pi^+\ell^+\ell^-$ offers insights into Standard Model (SM) physics and beyond. Driven by vector form factor in the SM, it can also probe non-standard contributions. [...]
arXiv:2404.03643; CERN-TH-2024-044.-
2024-06-26 - 4 p.
- Published in : Phys. Lett. B 855 (2024) 138824
Fulltext: 2404.03643 - PDF; Publication - PDF;
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Workshop summary: Kaons@CERN 2023
/ Anzivino, G. (INFN, Perugia ; Perugia U.) ; Cuendis, Sergio Arguedas (Costa Rica U.) ; Bernard, V. (IJCLab, Orsay) ; Bijnens, J. (Lund U.) ; Bloch-Devaux, B. (Turin U.) ; Bordone, M. (CERN) ; Brizioli, F. (INFN, Perugia ; CERN) ; Brod, J. (Cincinnati U.) ; Camalich, J.M. (IAC, La Laguna ; Laguna U., Tenerife) ; Ceccucci, A. (CERN) et al.
Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscape needs to be defined. With HIKE, KOTO-II and LHCb-Phase-II on the table and under scrutiny, it is a very good moment in time to take stock and contemplate about the opportunities these experiments and theoretical developments provide for particle physics in the coming decade and beyond. [...]
arXiv:2311.02923; CERN-TH-2023-206.-
2024 - 55 p.
- Published in : Eur. Phys. J. C 84 (2024) 377
Fulltext: 2311.02923 - PDF; document - PDF;
In : Kaons@CERN 2023, Geneva, Switzerland, 11 - 14 Sept 2023, pp.377
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