An invisible axion model with controlled FCNCs at tree level by Alejandro Celis, Javier Fuentes-Martín, Hugo Serôdio

“…Experimental limits relying on the axion–photon coupling, astrophysical considerations and familon searches in rare kaon and muon decays are discussed.…”
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Indirect constraints on top quark operators from a global SMEFT analysis by Francesco Garosi, David Marzocca, Antonio Rodríguez-Sánchez, Alfredo Stanzione

“…Within the SMEFT framework, we derive indirect constraints on Wilson Coefficients by combining a large set of low-energy observables: B-meson and kaon decays, meson mixing observables, precision electroweak and Higgs measurements, anomalous magnetic moments, lepton flavour violating processes, lepton flavour universality tests, and measurements of the Cabibbo angle. …”
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Measurement of the electron reconstruction efficiency at LHCb by The LHCb Collaboration, Boettcher, Thomas Julian, Craik, Daniel C, Weisser, Constantin, Williams, Michael

“…This measurement exploits B+ J/ψ(e+e-)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. …”
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A new algorithm for identifying the flavour of B 0 s mesons at LHCb

“…The first network is trained to select charged kaons produced in association with the B0 s meson. …”
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Search for C P Violation in D s + → K S 0 π + , D + → K S 0 K + , and D + → ϕ π + Decays

“…High-yield samples of kinematically and topologically similar Cabibbo-favored D(s)+ decays are analyzed to subtract nuisance asymmetries due to production and detection effects, including those induced by CP violation in the neutral kaon system. The results areACP(Ds+→KS0π+)=(1.3±1.9±0.5)×10-3,ACP(D+→KS0K+)=(-0.09±0.65±0.48)×10-3,ACP(D+→φπ+)=(0.05±0.42±0.29)×10-3,where the first uncertainties are statistical and the second systematic. …”
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Searches for 25 rare and forbidden decays of D+ and D s... by Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C. A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z.

“…Abstract A search is performed for rare and forbidden charm decays of the form D s + → h ± ℓ + ℓ ′ ∓ $$ {D}_{(s)}^{+}\to {h}^{\pm }{\mathrm{\ell}}^{+}{\mathrm{\ell}}^{\left(\prime \right)\mp } $$ , where h± is a pion or kaon and ℓ(′)± is an electron or muon. The measurements are performed using proton-proton collision data, corresponding to an integrated luminosity of 1.6 fb−1, collected by the LHCb experiment in 2016. …”
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Cross section measurements with monoenergetic muon neutrinos by Spitz, Joshua B.

“…The monoenergetic 236 MeV muon neutrino from charged kaon decay at rest (K[superscript +] → μ[superscript +]ν[subscript μ]) can be used to produce a novel set of cross section measurements. …”
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Studies of the decays B+ -> p(p)over-barph(+) and observation of B+ -> (Lambda)over-bar(1520)p by Aaij, R, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Jr, A, Amato, S, Amerio, S, Amhis, Y, Anderlini, L, Anderson, J, Andreassen, R, Andrews, J, Appleby, R, Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M

“…Dynamics and direct CP violation in three-body charmless decays of charged B mesons to a proton, an antiproton and a light meson (pion or kaon) are studied using data, corresponding to an integrated luminosity of 1.0 fb-1, collected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV. …”

Measurements of charged current lepton universality and |Vus| using tau lepton decays to e- ν(e) ν(τ), μ- ν(μ) ν(τ), π- ν(τ), and K- ν(τ). by Aubert, B, Karyotakis, Y, Lees, J, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, D, Kerth, LT, Kolomensky, Y, Lynch, G, Osipenkov, I, Tackmann, K, Tanabe, T, Hawkes, C, Soni, N

“…From these precision τ measurements, we test the standard model assumption of μ-e and τ-μ charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.…”

An overview of the status of the LHCb RICH detectors by Harnew, N, Grp, L

“…Reconstruction studies incorporating realistic backgrounds indicate excellent kaon efficiencies of around 97% and pion misidentification probabilities of around 6%, averaged over the full momentum range. …”

Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector by Abe, K, Adam, J, Aihara, H, Akiri, T, Andreopoulos, C, Aoki, S, Ariga, A, Ariga, T, Assylbekov, S, Autiero, D, Barbi, M, Barker, G, Barr, G, Bass, M, Batkiewicz, M, Bay, F, Bentham, S, Berardi, V, Berger, B, Berkman, S, Bertram, I, Bhadra, S, Blaszczyk, F, Blondel, A, Bojechko, C

“…Electron neutrinos coming from muons and kaons decay are also separately measured, resulting in a ratio with respect to the prediction of 0.68±0.30 and 1.10±0.14, respectively.…”

Observation of a resonance in B+ → K+ μ+ μ- decays at low recoil. by Aaij, R, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, A, Amato, S, Amerio, S, Amhis, Y, Anderlini, L, Anderson, J, Andreassen, R, Andrews, J, Appleby, R, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M

“…A broad peaking structure is observed in the dimuon spectrum of B+ → K+ μ+ μ- decays in the kinematic region where the kaon has a low recoil against the dimuon system. …”

Radiative Corrections to Semileptonic Beta Decays: Progress and Challenges by Chien-Yeah Seng

“…This brings substantial improvements to the precision of the electroweak radiative corrections in semileptonic decays of pion, kaon, free neutron and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi>J</mi><mi>P</mi></msup><mo>=</mo><msup><mn>0</mn><mo>+</mo></msup></mrow></semantics></math></inline-formula> nuclei that are important theory inputs in precision tests of the Standard Model. …”
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Results on system size dependence of strangeness production in the CERN SPS energy range from NA61/SHINE by Podlaski Piotr

“…In this contribution, the NA61/SHINE results on identified charged kaon and pion production in p+p, Be+Be and Ar+Sc collisions at the SPS energy range (√SNN = 5.1 - 17.3sNN=5.1−17.3 GeV) are presented. …”
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Constraints on light leptophilic dark matter mediators from decay experiments by Gerrit Bickendorf, Manuel Drees

“…Finally, we show that kaon and pion decays basically exclude a “Co-SIMP” scenario where a scalar dark matter particle has a dimension-5 coupling to electrons.…”
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Similarities in Multiparticle Production Processes in <i>pp</i> Collisions as Imprints of Nonextensive Statistics by Maciej Rybczynski, Zbigniew Wlodarczyk

“…In particular, data on kaon to pion (charged particles) multiplicity ratio are analyzed, assuming that the reaction occurs in some nonextensive environment. …”
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K0⁎(800) as a companion pole of K0⁎(1430) by T. Wolkanowski, M. Sołtysiak, F. Giacosa

“…This is a result of investigating quantum fluctuations with one kaon and one pion circulating in the loops dressing K0⁎(1430). …”
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Baryon properties in meson mediums from lattice QCD by Nicholson, Amy, Detmold, William

“…We also extract combinations of low-energy constants by comparing our results to tree level chiral perturbation theory at non-zero isospin/kaon chemical potential.…”
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Improved determination of the sample composition of dimuon events produced in p[overline p] collisions at √s = 1.96 TeV by CDF Collaboration, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Makhoul, Khaldoun

“…We use a new method to estimate with 5% accuracy the contribution of pion and kaon in-flight-decays to the dimuon data set acquired with the CDF detector. …”
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A new algorithm for identifying the flavour of B 0 s mesons at LHCb by The LHCb Collaboration, Ilten, Philip J, Williams, Michael

“…The first network is trained to select charged kaons produced in association with the B0 s meson. …”
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