Search for K+ decays to a muon and invisible particles

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, E. B.; 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:10.1016/j.physletb.2021.136259

Cited by 56 publications

(42 citation statements)

References 20 publications

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“…[146]) will not have sensitivity to this model. The best avenue to detect these GeV-scale sterile neutrinos may be to look for K /π → N [147,148] decays, where the N particles appears in the form of missing energy. While at the moment current experiments are sensitive to activesterile neutrino mixings ∼ (1 − 2) orders of magnitude larger than in the naive seesaw limit (see Eq.…”

Section: Discussionmentioning

confidence: 99%

The hubble tension as a hint of leptogenesis and neutrino mass generation

Escudero

Witte

2021

Eur. Phys. J. C

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The majoron, a neutrinophilic pseudo-Goldstone boson conventionally arising in the context of neutrino mass models, can damp neutrino free-streaming and inject additional energy density into neutrinos prior to recombination. The combination of these effects for an eV-scale mass majoron has been shown to ameliorate the outstanding $$H_0$$ H 0 tension, however only if one introduces additional dark radiation at the level of $$\Delta N_{\mathrm{eff}} \sim 0.5$$ Δ N eff ∼ 0.5 . We show here that models of low-scale leptogenesis can naturally source this dark radiation by generating a primordial population of majorons from the decays of GeV-scale sterile neutrinos in the early Universe. Using a posterior predictive distribution conditioned on Planck2018+BAO data, we show that the value of $$H_0$$ H 0 observed by the SH$$_0$$ 0 ES collaboration is expected to occur at the level of $$\sim 10\%$$ ∼ 10 % in the primordial majoron cosmology (to be compared with $$\sim 0.1\%$$ ∼ 0.1 % in the case of $$\Lambda $$ Λ CDM). This insight provides an intriguing connection between the neutrino mass mechanism, the baryon asymmetry of the Universe, and the discrepant measurements of $$H_0$$ H 0 .

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Section: Discussionmentioning

confidence: 99%

The hubble tension as a hint of leptogenesis and neutrino mass generation

Escudero

Witte

2021

Eur. Phys. J. C

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“…[3,4,10,[39][40][41]). Current generation particle physics experiments, including LHCb, CMS, ATLAS, T2K, Belle and NA62, all include HNL searches into their scientific programs [1,[42][43][44][45][46][47][48][49][50][51][52][53]. However, as pointed out in ref.…”

Section: Heavy Neutral Leptonsmentioning

confidence: 99%

Reinterpreting the ATLAS bounds on heavy neutral leptons in a realistic neutrino oscillation model

Tastet

Ruchayskiy

Timiryasov

2021

J. High Energ. Phys.

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Heavy neutral leptons (HNLs) are hypothetical particles, motivated in the first place by their ability to explain neutrino oscillations. Experimental searches for HNLs are typically conducted under the assumption of a single HNL mixing with a single neutrino flavor. However, the resulting exclusion limits may not directly constrain the corresponding mixing angles in realistic HNL models — those which can explain neutrino oscillations. The reinterpretation of the results of these experimental searches turns out to be a non-trivial task, that requires significant knowledge of the details of the experiment. In this work, we perform a reinterpretation of the latest ATLAS search for HNLs decaying promptly to a tri-lepton final state. We show that in a realistic model with two HNLs, the actual limits can vary by several orders of magnitude depending on the free parameters of the model. Marginalizing over the unknown model parameters leads to an exclusion limit on the total mixing angle which can be up to 3 orders of magnitude weaker than the limits reported in ref. [1]. This demonstrates that the reinterpretation of results from experimental searches is a necessary step to obtain meaningful limits on realistic models. We detail a few steps that can be taken by experimental collaborations in order to simplify the reuse of their results.

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“…Searches for the K + → µ + N decay, with N invisible, have been performed with prescaled minimum bias datasets since a single muon is the most common K + decay final state. The BNL E949 and NA62 (Run 1) experiments have established O(10 −8 ) upper limits on |U µN | 2 in complementary HNL mass ranges of 180-300 MeV and 200-384 MeV, respectively [171,389]. The constraints on HNL mass and mixing parameters |U N | 2 established by these searches are shown in Fig.…”

Section: Searches For Thementioning

confidence: 93%

“…In most of the parameter space of interest, N is long-lived on detector timescales and so the signature is a single charged lepton and missing mass. The HNL lifetime (for m N < m K ) exceeds 10 The NA62 collaboration has performed world-leading searches for HNL production in kaon decays, leading to some of the most stringent limits on |U eN | 2 and U µN 2 in the m N < m K regime [169,171]. These constraints are shown as red excluded regions in Fig.…”

Section: Heavy Neutral Leptonsmentioning

confidence: 99%

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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.

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Search for K+ decays to a muon and invisible particles

Cited by 56 publications

References 20 publications

The hubble tension as a hint of leptogenesis and neutrino mass generation

The hubble tension as a hint of leptogenesis and neutrino mass generation

Reinterpreting the ATLAS bounds on heavy neutral leptons in a realistic neutrino oscillation model

New Physics Searches at Kaon and Hyperon Factories

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