Measurement of the very rare K+ → $$ {\pi}^{+}\nu \overline{\nu} $$ decay

Gil, E. Cortina; Kleimenova, A.; Minucci, E.; Padolski, S.; Petrov, P.; Shaikhiev, A.; Volpe, R.; Numao, T.; Petrov, Y.; Velghe, B.; Bryman, D.; Fu, J.; Husek, T.; Jerhot, Jan; Kampf, Karol; Zamkovsky, M.; Aliberti, R.; Khoriauli, G.; Kunze, J.; Lomidze, D.; Peruzzo, L.; Vormstein, M.; Wanke, R.; Dalpiaz, P.; Fiorini, M.; Neri, Ilaria; Norton, A.; Petrucci, F.; Wahl, H.; Ramusino, A. Cotta; Gianoli, A.; Iacopini, E.; Latino, G.; Lenti, M.; Parenti, A.; Bizzeti, A.; Bucci, F.; Antonelli, A.; Georgiev, G.; Kozhuharov, V.; Lanfranchi, G.; Martellotti, S.; Moulson, M.; Spadaro, T.; Ambrosino, F.; Capussela, T.; Corvino, M.; Filippo, D. Di; Massarotti, P.; Mirra, M.; Napolitano, M.; Saracino, G.; Anzivino, G.; Brizioli, Francesco; Imbergamo, E.; Lollini, R.; Piandani, R.; Santoni, C.; Barbanera, M.; Cenci, P.; Checcucci, B.; Lubrano, P.; Lupi, M.; Pepé, M.; Piccini, M.; Costantini, F.; Lella, L. Di; Doble, N.; Giorgi, M. A.; Giudici, S.; Lamanna, G.; Lari, Enrico; Pedreschi, E.; Sozzi, M.; Cerri, C.; Fantechi, R.; Pontisso, L.; Spinella, F.; Mannelli, I.; D’Agostini, G.; Raggi, M.; Biagioni, A.; Leonardi, E.; Lonardo, A.; Valente, P.; Vicini, P.; Ammendola, Roberto; Bonaiuto, V.; Fucci, A.; Salamon, A.; Sargeni, F.; Arcidiacono, R.; Bloch-Devaux, B.; Boretto, M.; Menichetti, E.; Migliore, E.; Soldi, D.; Biino, C.; Filippi, A.; Marchetto, F.; Engelfried, J.; Estrada-Tristan, N.; Bragadireanu, A. M.; Ghinescu, Stefan Alexandru; Hutanu, Ovidiu Emanuel; Baeva, Aigul; Baigarashev, Dosbol; Emelyanov, D.; Enik, T.; Falaleev, V.; Kekelidze, V.; Korotkova, A.; Litov, L.; Madigozhin, D.; Misheva, M.; Molokanova, N.; Movchan, S.; Polenkevich, I.; Potrebenikov, Yu.; Shkarovskiy, S.; Zinchenko, A.; Fedotov, S.; Gushchin, E.; Khotyantsev, A.; Kudenko, Y.; Kurochka, V.; Medvedeva, M.; Mefodev, A.; Kholodenko, S.; Kurshetsov, V.; Obraztsov, V.; Ostankov, A.; Semenov, V.; Sugonyaev, V.P.; Yushchenko, O.; Bician, L.; Blažek, T.; Černý, V.; Kučerová, Z.; Bernhard, J.; Ceccucci, A.; Danielsson, H. O.; Simone, N. De; Duval, F.; Döbrich, Babette; Federici, L.; Gamberini, E.; Gatignon, L.; Guida, R.; Hahn, F.; Holzer, Eva Barbara; Jenninger, B.; Koval, M.; Laycock, P.; Miotto, G. Lehmann; Lichard, P.; Mapelli, A.; Marchevski, R.; Massri, Karim; Noy, M.; Palladino, V.; Perrin-Terrin, M.; Pinzino, J.; Ryjov, V.; Schuchmann, S.; Venditti, S.; Bache, T.; Brunetti, Maria Brigida; Duk, V.; Fascianelli, V.; Fry, J. R.; Gonnella, F.; Goudzovski, E.; Henshaw, Jack; Iacobuzio, L.; Lazzeroni, C.; Lurkin, N.; Newson, F.; Parkinson, C. J.; Romano, A.; Sergi, A.; Sturgess, A.; Swallow, Joel; Heath, H. F.; Page, Ryan; Trilov, Stoyan Miroslavov; Angelucci, B.; Britton, D.; Graham, C.; Protopopescu, D.; Carmignani, Joseph; Dainton, J. B.; Jones, R. W. L.; Ruggiero, G.; Fulton, L.; Hutchcroft, D.; Maurice, E.; Wrona, B.; Conovaloff, A.; Cooper, P. S.; Coward, D.; Rubin, P.

doi:10.1007/jhep06(2021)093

Cited by 96 publications

(105 citation statements)

References 46 publications

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“…3: Constraints on B(K + → π + X) with the X particle decaying invisibly or escaping the detector as a function of X mass up to the kinematic endpoint (vertical dotted line). Red regions are excluded by the NA62 search for K + → π + X [109], the blue region by π 0 → inv [110], and grey regions by the BNL E949 experiment [111].…”

Section: And Similarly For Cmentioning

confidence: 99%

New Physics Searches at Kaon and Hyperon Factories

Goudzovski¹,

Redigolo²,

Tobioka³

et al. 2022

Preprint

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Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons benefit from their small total decay widths and the availability of very large datasets. On the other hand, useful complementary information is provided by hyperon decay measurements. We summarize the relevant phenomenological models and the status of the searches in a comprehensive list of kaon and hyperon decay channels. We identify new search strategies for under-explored signatures, and demonstrate that the improved sensitivities from current and nextgeneration experiments could lead to a qualitative leap in the exploration of light dark sectors.

show abstract

Section: And Similarly For Cmentioning

confidence: 99%

New Physics Searches at Kaon and Hyperon Factories

Goudzovski¹,

Redigolo²,

Tobioka³

et al. 2022

Preprint

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show abstract

“…[24], which used 1.93 × 10 20 Protons on Target (PoT). For comparison we also show the constraints from the NA62 experiment [18,33], E787 & E949 [17], CHARM [19,31] and LHCb [5,15,16]. The shaded vertical band is excluded due to the large a − π 0 mixing, and is taken from Ref.…”

Section: Bounds From Current Microboone Datamentioning

confidence: 99%

“…Solid lines assume 89% and 30% signal and background systematic uncertainties, while dotted lines assume 20% uncertainties for both. For comparison, the shaded areas show the current bounds from E137 [21,22], NA62 [18,33], E787 & E949 [17], LHCb [5,15,16], CHARM [19,31] and LEP [29], as well as our bound derived from MicroBooNE data in Sec. 4.1.…”

Section: Future Sensitivitymentioning

confidence: 99%

“…This has been driven in part by the operation of new axion search experiments, but also by the identification of new and complementary opportunities offered by experiments in the intensity frontier at accelerator facilities, both in beam-dumps and colliders. Stringent limits have been recently obtained from B-meson decays [14][15][16], from kaon decays [17,18] and from neutrino experiments [19]. Very important constraints from past beamdump experiments [20,21] have also been recasted in the context of more general ALP searches [22].…”

Section: Introductionmentioning

confidence: 99%

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New bounds on axion-like particles from MicroBooNE

Coloma,

Hernández,

Urrea

2022

Preprint

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Neutrino experiments lie at the edge of the intensity frontier and therefore can be exploited to search for new light particles weakly coupled to the visible sector. In this work we derive new constraints on axion-like particles (ALPs) using data from the MicroBooNE experiment, from a search for e + e − pairs pointing in the direction of the NuMI absorber. In particular, we consider the addition of higher-dimensional effective operators coupling the ALP to the electroweak gauge bosons. These would induce K → πa from kaon decay at rest in the NuMI absorber, as well as ALP decays into pairs of leptons or photons. We discuss in detail and compare various results obtained for the decay width K → πa in previous literature. For the operator involving the Higgs, MicroBooNE already sets competitive bounds (comparable to those of NA62) for ALP masses between 100 and 200 MeV. We also compute the expected sensitivities from the full NuMI dataset recorded at MicroBooNE. Our results show that a search for a a → γγ signal may be able to improve over current constraints from beam-dump experiments on the operator involving the ALP coupling to the W .

show abstract

“…Channels such as B → µ + µ − and K → πν ν do not get contributions from dipole operators and thus do not obtain enhanced contributions in the mLRSM. With the experimental sensitivity approaching the SM level [107][108][109], in the near future these channels might be used for an extraction of the V L td and V L ts CKM elements free of LR contamination.…”

Section: Jhep11(2021)127mentioning

confidence: 99%

A low-energy perspective on the minimal left-right symmetric model

Dekens

Andreoli

Vries

et al. 2021

J. High Energ. Phys.

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We perform a global analysis of the low-energy phenomenology of the minimal left-right symmetric model (mLRSM) with parity symmetry. We match the mLRSM to the Standard Model Effective Field Theory Lagrangian at the left-right-symmetry breaking scale and perform a comprehensive fit to low-energy data including mesonic, neutron, and nuclear β-decay processes, ∆F = 1 and ∆F = 2 CP-even and -odd processes in the bottom and strange sectors, and electric dipole moments (EDMs) of nucleons, nuclei, and atoms. We fit the Cabibbo-Kobayashi-Maskawa and mLRSM parameters simultaneously and determine a lower bound on the mass of the right-handed WR boson. In models where a Peccei-Quinn mechanism provides a solution to the strong CP problem, we obtain $$ {M}_{W_R} $$ M W R ≳ 5.5 TeV at 95% C.L. which can be significantly improved with next-generation EDM experiments. In the P-symmetric mLRSM without a Peccei-Quinn mechanism we obtain a more stringent constraint $$ {M}_{W_R} $$ M W R ≳ 17 TeV at 95% C.L., which is difficult to improve with low-energy measurements alone. In all cases, the additional scalar fields of the mLRSM are required to be a few times heavier than the right-handed gauge bosons. We consider a recent discrepancy in tests of first-row unitarity of the CKM matrix. We find that, while TeV-scale WR bosons can alleviate some of the tension found in the Vud,us determinations, a solution to the discrepancy is disfavored when taking into account other low-energy observables within the mLRSM.

show abstract

Measurement of the very rare K+ → $$ {\pi}^{+}\nu \overline{\nu} $$ decay

Abstract: The NA62 experiment reports the branching ratio measurement $$ \mathrm{BR}\left({K}^{+}\to {\pi}^{+}\nu \overline{\nu}\right)=\left({10.6}_{-3.4}^{+4.0}\left|{}_{\mathrm{stat}}\right.\pm {0.9}_{\mathrm{syst}}\right)\times {10}^{-11} $$ BR K + → π + … Show more

Cited by 96 publications

References 46 publications

New Physics Searches at Kaon and Hyperon Factories

New Physics Searches at Kaon and Hyperon Factories

New bounds on axion-like particles from MicroBooNE

A low-energy perspective on the minimal left-right symmetric model

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