Zobrazeno 1 - 10
of 556
pro vyhledávání: '"Kaon Physics"'
Autor:
Siavash Neshatpour
Publikováno v:
Symmetry, Vol 16, Iss 8, p 946 (2024)
In this write-up, we provide an overview of the existing theoretical framework concerning rare kaon decays, with a particular emphasis on flavour-changing neutral current processes. These decays offer crucial indirect pathways for investigating short
Externí odkaz:
https://doaj.org/article/1800c8f6614d4f40b3789d509faed812
Autor:
D. Babusci, M. Berłowski, C. Bloise, F. Bossi, P. Branchini, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D'Agostini, R. D'Amico, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Domenico, E. Diociaiuti, D. Domenici, A. D'Uffizi, G. Fantini, A. Gajos, S. Gamrat, P. Gauzzi, S. Giovannella, E. Graziani, X. Kang, A. Kupść, G. Mandaglio, M. Martini, S. Miscetti, P. Moskal, A. Passeri, E. Pérez del Río, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E.P. Solodov, W. Wiślicki, M. Wolke, J. Bernabéu
Publikováno v:
Physics Letters B, Vol 845, Iss , Pp 138164- (2023)
Tests of the T, CP and CPT symmetries in the neutral kaon system are performed by the direct comparison of the probabilities of a kaon transition process to its symmetry-conjugate. The exchange of in and out states required for a genuine test involvi
Externí odkaz:
https://doaj.org/article/f9987f2f931f49f5975fe253720c54a0
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-129 (2022)
Abstract Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-energy extensions of the Standard Model (SM). We investigate the phenomenology of an ALP with flavor-changing couplings, and present a comprehensive analysis
Externí odkaz:
https://doaj.org/article/6595b34c76134448b7c1505e0d985831
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-15 (2022)
Abstract Recently Belle collaboration reported new measurements for the branching fractions with the first observing two processes of B Ξ c 0 → Λ K S 0 $$ \mathcal{B}\left({\Xi}_c^0\to \Lambda {K}_S^0\right) $$ , B Ξ c 0 → Σ 0 K S 0 $$ \mathc
Externí odkaz:
https://doaj.org/article/54b52a84b87445d696feb5f11fd05612
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-36 (2022)
Abstract Leptoquarks provide viable solutions to the flavour anomalies, i.e. they can explain the tensions between the measurements and the Standard Model predictions of the anomalous magnetic moment of the muon as well as b → sℓ + ℓ − and b
Externí odkaz:
https://doaj.org/article/fc3c2dd27ca942b99ef07b6d094e73e7
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-20 (2022)
Abstract We present the calculation of the short-distance power corrections to the CP-violation parameter ε K coming from dimension-8 operators in the ∆S = 2 effective Hamiltonian. A first estimate of this contribution, obtained for large-N c and
Externí odkaz:
https://doaj.org/article/2a9d21c6d36247049506b3ece1404a91
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-29 (2022)
Abstract We investigate the potential of rare hyperon decays to probe the short distance structure in the s → dv v ¯ $$ s\to dv\overline{v} $$ and s → dℓ + ℓ − transitions. Hyperon decays into neutrinos B 1 → B 2 v v ¯ $$ \left({B}_1\to
Externí odkaz:
https://doaj.org/article/f9cd596c63ac483788baaca6685ca3b7
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-28 (2022)
Abstract We calculate the ratios R τ/P ≡ Γ (τ → Pν τ [γ]) /Γ (P → μν μ [γ]) (P = π, K) at one loop following a large-N C expansion where Chiral Perturbation Theory is enlarged by including the lightest resonances and respecting the
Externí odkaz:
https://doaj.org/article/61feb8f401204faeb094f4bf0741e573
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-19 (2021)
Abstract As an important step towards a complete next-to-leading (NLO) QCD analysis of the ratio ε′/ε within the Standard Model Effective Field Theory (SMEFT), we present for the first time the NLO master formula for the BSM part of this ratio ex
Externí odkaz:
https://doaj.org/article/d10096bca4e54e07afc179517e62fdbc
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-30 (2021)
Abstract The parameter ϵ K measures CP violation in the neutral kaon system. It is a sensitive probe of new physics and plays a prominent role in the global fit of the Cabibbo-Kobabyashi-Maskawa matrix. The perturbative theory uncertainty is current
Externí odkaz:
https://doaj.org/article/9b6efef7db974b258168b8c7031ba99a