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Rare Kaon Decays [PDF]

B Physics and CP Violation, 1999
The current status of rare kaon decay experiments is reviewed. New limits in the search for Lepton Flavor Violation are discussed, as are new measurements of the CKM matrix.Comment: 8 pages, 3 figures, LaTeX, presented at the 3rd International ...
A. Alavi-Harati, A. Alavi-Harati, A. Pich, A.J. Buras, B. Winstein, D. Ambrose, D. Ambrose, D. Ambrose, D. Bryman, D. Gomez-Dumm, F. Gabbiani, G. D'Ambrosio, G. D'Ambrosio, G. Ecker, G. Ecker, G. Ecker, G. Valencia, G. Valencia, H.B. Greenlee, I. Bigi, J. Donoghue, J. Hagelin, J. Ritchie, J.F. Donoghue, K. Arisaka, L. Littenberg, L. Littenberg, L. Littenberg, N. Bilic, R. Appel, R. Battiston, S. Adler, T. Inami, W. Marciano, W.M. Morse, Y. Grossman   +35 more
core   +12 more sources

B → D 0 ∗ $$ B\to {D}_0^{\ast } $$ and B s → D s 0 ∗ $$ {B}_s\to {D}_{s0}^{\ast } $$ form factors from QCD light-cone sum rules

Journal of High Energy Physics, 2023
We present the first application of QCD light-cone sum rules (LCSRs) with B (s)-meson distribution amplitudes to the B s → D s 0 ∗ $$ {B}_{(s)}\to {D}_{(s)0}^{\ast } $$ form factors, where D s 0 ∗ $$ {D}_{(s)0}^{\ast } $$ is a charmed scalar meson.
Nico Gubernari, Alexander Khodjamirian, Rusa Mandal, Thomas Mannel   +3 more
doaj   +1 more source

B → D1(2420) and B → D 1 ′ $$ {\mathrm{D}}_1^{\prime } $$ (2430) form factors from QCD light-cone sum rules

Journal of High Energy Physics, 2022
We perform the first calculation of form factors in the semileptonic decays B → D 1(2420)ℓν ℓ and B → D 1 ′ $$ {D}_1^{\prime } $$ (2430)ℓν ℓ using QCD light-cone sum rules (LCSRs) with B-meson distribution amplitudes. In this calculation the c-quark mass
Nico Gubernari, Alexander Khodjamirian, Rusa Mandal, Thomas Mannel   +3 more
doaj   +1 more source

Complete analysis on QED corrections to B q → τ + τ −

Journal of High Energy Physics, 2023
Motivated by a dynamical enhancement of the electromagnetic corrections by a power of ΛQCD/m b in B d,s → μ + μ − at next-to-leading order (NLO), we extend the QED factorization effects on the leptonic B meson decays with light muon leptons to tauonic ...
Yong-Kang Huang, Yue-Long Shen, Xue-Chen Zhao, Si-Hong Zhou   +3 more
doaj   +1 more source

Improved theory predictions and global analysis of exclusive b → sμ + μ − processes

Journal of High Energy Physics, 2022
We provide improved Standard Model theory predictions for the exclusive rare semimuonic processes B → K (*) μ + μ − and B s → ϕμ + μ − . Our results are based on a novel parametrization of the non-local form factors, which manifestly respects a recently ...
Nico Gubernari, Méril Reboud, Danny van Dyk, Javier Virto   +3 more
doaj   +1 more source

Fingerprinting CP-violating New Physics with B → Kμ + μ −

Journal of High Energy Physics, 2023
The B → Kℓ + ℓ − system is particularly interesting to explore physics beyond the Standard Model. Such effects could provide new sources of CP violation, thereby giving rise to Wilson coefficients which could not only be real, as assumed in most analyses,
Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos   +3 more
doaj   +1 more source

From D s → γ in lattice QCD to B s → μμγ at high q 2

Journal of High Energy Physics, 2023
We use a recent lattice determination of the vector and axial D s → γ form factors at high squared momentum transfer q 2 to infer their B s → γ counterparts. To this end, we introduce a phenomenological approach summarized as follows.
Diego Guadagnoli, Camille Normand, Silvano Simula, Ludovico Vittorio   +3 more
doaj   +1 more source

Angular distribution of Λ b 0 → p K − ℓ + ℓ − $$ {\Lambda}_b^0\to p{K}^{-}{\ell}^{+}{\ell}^{-} $$ decays comprising Λ resonances with spin ≤ 5/2

Journal of High Energy Physics, 2023
This paper describes the angular distribution of Λ b 0 → Λ → p K − ℓ + ℓ − $$ {\Lambda}_b^0\to \Lambda \left(\to p{K}^{-}\right){\ell}^{+}{\ell}^{-} $$ decays. A full expression is given for the case of multiple interfering spin-states with spin ≤ 5 2 $$
A. Beck, T. Blake, M. Kreps
doaj   +1 more source

Light-cone sum rules for S-wave B → Kπ form factors

Journal of High Energy Physics, 2023
We derive a set of light-cone sum rules relating the S-wave B → Kπ hadronic form factors to the B-meson light-cone distribution amplitudes (LCDAs), taking into account the complete set of LCDAs up to and including twist four. These results complement the
Sébastien Descotes-Genon, Alexander Khodjamirian, Javier Virto, K. Keri Vos   +3 more
doaj   +1 more source

Insights on the current semi-leptonic B-decay discrepancies — and how B s → μ + μ − γ can help

Journal of High Energy Physics, 2023
B s → μ + μ − γ, measured at high q 2 as a partially reconstructed decay, can probe the origin of the existing discrepancies in semi-leptonic b → s and b → c decays. We perform a complete study of this possibility.
Diego Guadagnoli, Camille Normand, Silvano Simula, Ludovico Vittorio   +3 more
doaj   +1 more source