Searches for hidden sectors using K+ → π+X decays
A bstract Results from the study of the rare decays $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>ν</mml:mi> <mml:mover> <mml:mi>ν</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> , K + → π + μ + μ − and K + → π + γγ at the NA62 experiment at CERN are interpreted in terms of improved limits for $$ \mathcal{B}\left({K}^{+}\to {\pi}^{+}X\right) $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>X</mml:mi> </mml:mrow> </mml:mfenced> </mml:math> and coupling parameters of hidden-sector models, where X is a mediator. World-leading limits are achieved for dark photon, dark scalar and axion-like particle models.
Authors
- R. Fantechi (ORCID: https://orcid.org/0000-0002-6243-5726)
- A. Briano Olvera (ORCID: https://orcid.org/0000-0001-6121-3905)
- D. Di Filippo (ORCID: https://orcid.org/0000-0003-1567-6786)
- E. Gamberini (ORCID: https://orcid.org/0000-0002-6040-4985)
- L. Federici (ORCID: https://orcid.org/0000-0002-3401-9522)
- F. Spinella (ORCID: https://orcid.org/0000-0002-9607-7920)
- M. Napolitano (ORCID: https://orcid.org/0000-0003-1074-9552)
- R. Piandani (ORCID: https://orcid.org/0000-0003-2226-8924)
- A. Antonelli (ORCID: https://orcid.org/0000-0001-7671-7890)
- I. Rosa (ORCID: https://orcid.org/0009-0002-7564-1825)
- P. Rubin (ORCID: https://orcid.org/0000-0001-6678-4985)
- G. Saracino (ORCID: https://orcid.org/0000-0002-0714-5777)
- E. Leonardi (ORCID: https://orcid.org/0000-0001-8728-7582)
- A. Okhotnikov (ORCID: https://orcid.org/0000-0003-1404-3522)
- I. Mannelli (ORCID: https://orcid.org/0000-0003-0445-7422)
- R. Volpe (ORCID: https://orcid.org/0000-0003-1782-2978)
- G. Lanfranchi (ORCID: https://orcid.org/0000-0002-9467-8001)
- Babette Döbrich (ORCID: https://orcid.org/0000-0002-6008-8601)
- T. Blažek (ORCID: https://orcid.org/0000-0002-2645-0283)
- P. Dalpiaz
- D. Lomidze (ORCID: https://orcid.org/0000-0003-3936-6942)
- A. Conovaloff
- J. Pinzino (ORCID: https://orcid.org/0000-0002-7418-0636)
- Sayabek Sakhiyev (ORCID: https://orcid.org/0000-0002-9014-9487)
- G. Khoriauli (ORCID: https://orcid.org/0000-0002-6353-8452)
- Phillip J. Cooper (ORCID: https://orcid.org/0000-0001-8045-1060)
- Z. Hives (ORCID: https://orcid.org/0000-0002-5025-993X)
- A. Parenti (ORCID: https://orcid.org/0000-0002-6132-5680)
- D. Coward (ORCID: https://orcid.org/0000-0001-7588-1779)
- Nurzhan Saduyev (ORCID: https://orcid.org/0000-0002-5144-0677)
- F. Bucci (ORCID: https://orcid.org/0000-0003-1726-3838)
- C. Kenworthy (ORCID: https://orcid.org/0009-0002-8815-0048)
- K. Massri (ORCID: https://orcid.org/0000-0001-7533-6295)
- Paolo Cretaro (ORCID: https://orcid.org/0000-0002-2229-149X)
- T. Husek (ORCID: https://orcid.org/0000-0002-7208-9150)
- G. Tinti (ORCID: https://orcid.org/0000-0003-1364-844X)
- N. Estrada-Tristan (ORCID: https://orcid.org/0000-0003-2977-9380)
- V. Falaleev (ORCID: https://orcid.org/0000-0003-3150-2196)
- A. Sturgess (ORCID: https://orcid.org/0000-0002-8104-5571)
- R. Lollini (ORCID: https://orcid.org/0000-0003-3898-7464)
- V. Semenov
- S. Martellotti (ORCID: https://orcid.org/0000-0002-4363-7816)
- Kevin Alexander Rodriguez Rivera (ORCID: https://orcid.org/0000-0001-5723-9176)
- D. Kereibay (ORCID: https://orcid.org/0000-0001-8943-1314)
- N. Doble (ORCID: https://orcid.org/0000-0002-0174-5608)
- M. Giorgi (ORCID: https://orcid.org/0000-0001-9571-6260)
- P. Lichard (ORCID: https://orcid.org/0000-0003-2223-9373)
- R. Fiorenza (ORCID: https://orcid.org/0000-0003-4965-7073)
- E. Minucci (ORCID: https://orcid.org/0000-0002-3972-6824)
- M. Mirra (ORCID: https://orcid.org/0000-0002-1190-2961)
- С. Н. Федотов (ORCID: https://orcid.org/0000-0002-4112-1672)
- A. Bizzeti (ORCID: https://orcid.org/0000-0001-5729-5530)
- P. Valente (ORCID: https://orcid.org/0000-0002-5413-0068)
- J. R. Fry (ORCID: https://orcid.org/0000-0002-3680-361X)
- B. Angelucci
- R. Aliberti (ORCID: https://orcid.org/0000-0003-3500-4012)
- H. Danielsson (ORCID: https://orcid.org/0000-0002-1016-5576)
- V. Fascianelli (ORCID: https://orcid.org/0000-0002-0485-5984)
- E.B. Holzer (ORCID: https://orcid.org/0000-0003-2622-6844)
- Marián Kolesár (ORCID: https://orcid.org/0000-0002-9085-2252)
- M. Ceoletta (ORCID: https://orcid.org/0000-0002-2532-0217)
- I. Neri (ORCID: https://orcid.org/0000-0002-9669-1058)
- A. Tomczak (ORCID: https://orcid.org/0000-0001-5635-3567)
- M. Turisini (ORCID: https://orcid.org/0000-0002-5422-1891)
- V. Palladino (ORCID: https://orcid.org/0000-0002-9786-9620)
- L. Petit (ORCID: https://orcid.org/0009-0000-8079-9710)
- Karol Kampf (ORCID: https://orcid.org/0000-0003-1096-667X)
- V. Kurshetsov (ORCID: https://orcid.org/0000-0003-0174-7336)
- P. Vicini (ORCID: https://orcid.org/0000-0002-4379-4563)
- D. Soldi (ORCID: https://orcid.org/0000-0001-9059-4831)
- D. Bryman (ORCID: https://orcid.org/0000-0002-9691-0775)
- V. Cerny (ORCID: https://orcid.org/0000-0003-1998-3441)
- E. Menichetti (ORCID: https://orcid.org/0000-0001-7143-8200)
- F. Costantini (ORCID: https://orcid.org/0000-0002-2974-0067)
- S. Giudici (ORCID: https://orcid.org/0000-0003-3423-7981)
- E. Lari (ORCID: https://orcid.org/0000-0003-3303-0524)
- G. Anzivino (ORCID: https://orcid.org/0000-0002-5967-0952)
- O. Yushchenko (ORCID: https://orcid.org/0000-0003-4236-5115)
- L. Di Lella (ORCID: https://orcid.org/0000-0003-3697-1098)
- Ottorino Frezza (ORCID: https://orcid.org/0000-0001-8277-1877)
- E. Iacopini (ORCID: https://orcid.org/0000-0002-5605-2497)
- S. Movchan (ORCID: https://orcid.org/0000-0002-2822-8600)
- K. Salamatin (ORCID: https://orcid.org/0000-0001-6287-8685)
- D. Emelyanov
- Roberto Ammendola (ORCID: https://orcid.org/0000-0003-4501-3289)
- R. Wanke (ORCID: https://orcid.org/0000-0002-3636-360X)
- F. Sargeni (ORCID: https://orcid.org/0000-0002-0131-236X)
- M. Soldani (ORCID: https://orcid.org/0000-0003-4902-943X)
- T. Numao (ORCID: https://orcid.org/0000-0001-5232-6190)
- Z. Kucerova (ORCID: https://orcid.org/0000-0001-8906-3902)
- M. Francesconi (ORCID: https://orcid.org/0000-0002-7029-7634)
- F. Marchetto (ORCID: https://orcid.org/0000-0002-5623-8494)
- V. Duk (ORCID: https://orcid.org/0000-0001-6440-0087)
- V. Bautin (ORCID: https://orcid.org/0000-0002-5283-6059)
- G. Latino (ORCID: https://orcid.org/0000-0002-4098-3502)
- J. Engelfried (ORCID: https://orcid.org/0000-0001-5478-0602)
- T. Enik (ORCID: https://orcid.org/0000-0002-2761-9730)
- B. Checcucci (ORCID: https://orcid.org/0000-0002-6464-1099)
- I. Panichi (ORCID: https://orcid.org/0000-0001-7749-7914)
- L. Pontisso (ORCID: https://orcid.org/0000-0001-7137-5254)
- P. Cenci (ORCID: https://orcid.org/0000-0001-6149-2676)
- M. Koval (ORCID: https://orcid.org/0000-0002-6027-317X)
- Á. Salamon (ORCID: https://orcid.org/0000-0002-8438-8983)
- E. Cortina (ORCID: https://orcid.org/0000-0001-9627-699X)
- S. Kholodenko (ORCID: https://orcid.org/0000-0002-0260-6570)
- M. Fiorini (ORCID: https://orcid.org/0000-0001-6559-2084)
- L. Peruzzo (ORCID: https://orcid.org/0000-0002-4752-6160)
- G. Lamanna (ORCID: https://orcid.org/0000-0001-7452-8498)
- B. Velghe (ORCID: https://orcid.org/0000-0002-0797-8381)
- L. Bician (ORCID: https://orcid.org/0000-0001-9318-0116)
- C. Santoni (ORCID: https://orcid.org/0000-0001-7023-7116)
- M. Medvedeva
- R. Giordano (ORCID: https://orcid.org/0000-0002-5496-7247)
- E. Pedreschi (ORCID: https://orcid.org/0000-0001-7631-3933)
- V. Sugonyaev (ORCID: https://orcid.org/0000-0003-4449-9993)
- P. Laycock (ORCID: https://orcid.org/0000-0002-8572-5339)
- L. Litov (ORCID: https://orcid.org/0000-0002-8511-6883)
- V. Shang (ORCID: https://orcid.org/0000-0002-1436-6092)
- F. Brizioli (ORCID: https://orcid.org/0000-0002-2047-441X)
- Vincenzo Bonaiuto (ORCID: https://orcid.org/0000-0002-2328-4793)
- F. Gonnella (ORCID: https://orcid.org/0000-0003-0885-1654)
- S. M. Trilov (ORCID: https://orcid.org/0000-0003-0267-6402)
- J. Henshaw (ORCID: https://orcid.org/0000-0001-7059-421X)
- V. Kekelidze (ORCID: https://orcid.org/0000-0001-8122-5065)
- M. Lenti (ORCID: https://orcid.org/0000-0002-2765-3955)
- M. Raggi (ORCID: https://orcid.org/0000-0002-7448-9481)
- R. Arcidiacono (ORCID: https://orcid.org/0000-0001-5904-142X)
- M. Zamkovsky (ORCID: https://orcid.org/0000-0002-5067-4789)
- J. Bernhard (ORCID: https://orcid.org/0000-0001-9256-971X)
- V. Kurochka
- G. Ruggiero (ORCID: https://orcid.org/0000-0001-6605-4739)
- M. Misheva (ORCID: https://orcid.org/0000-0003-4854-5301)
- D. Madigozhin (ORCID: https://orcid.org/0000-0001-8524-3455)
- N. Lurkin (ORCID: https://orcid.org/0000-0002-9440-5927)
- S. Schuchmann (ORCID: https://orcid.org/0000-0002-8088-4226)
- J. Carmignani (ORCID: https://orcid.org/0000-0002-1705-1061)
- Jie Ying Fu (ORCID: https://orcid.org/0000-0002-5489-2732)
- P. Massarotti (ORCID: https://orcid.org/0000-0002-9335-9690)
- Atakan Tugberk Akmete (ORCID: https://orcid.org/0000-0002-5580-5477)
- P. Boboc (ORCID: https://orcid.org/0000-0001-5532-4887)
- K. Gorshanov (ORCID: https://orcid.org/0000-0001-7912-5962)
- A. Norton (ORCID: https://orcid.org/0000-0001-5959-5879)
- A. Shaikhiev (ORCID: https://orcid.org/0000-0003-2921-8743)
- Yerzhan Mukhamejanov (ORCID: https://orcid.org/0000-0002-9064-6061)
- L. Bandiera (ORCID: https://orcid.org/0000-0002-5537-9674)
- V. Obraztsov (ORCID: https://orcid.org/0000-0002-0994-3641)
- D. Protopopescu (ORCID: https://orcid.org/0000-0002-8047-6513)
- N. Canale (ORCID: https://orcid.org/0000-0003-2262-7077)
- E. Maurice (ORCID: https://orcid.org/0000-0002-7366-4364)
- M. Reyes (ORCID: https://orcid.org/0000-0003-1347-2579)
- J. Swallow (ORCID: https://orcid.org/0000-0002-1521-0911)
- V. Kozhuharov (ORCID: https://orcid.org/0000-0002-0669-7799)
- J. Jerhot (ORCID: https://orcid.org/0000-0002-3236-1471)
- M. Romagnoni (ORCID: https://orcid.org/0000-0002-2775-6903)
- A. Kleimenova (ORCID: https://orcid.org/0000-0002-9129-4985)
- J. Schubert (ORCID: https://orcid.org/0000-0002-5782-8816)
- T. Spadaro (ORCID: https://orcid.org/0000-0002-7101-2389)
- R. Negrello (ORCID: https://orcid.org/0009-0008-3396-5550)
- T. Bache (ORCID: https://orcid.org/0000-0003-4520-830X)
- D. Baigarashev (ORCID: https://orcid.org/0000-0001-6101-317X)
- M. Moulson (ORCID: https://orcid.org/0000-0002-3951-4389)
- M. Boretto (ORCID: https://orcid.org/0000-0001-5012-4480)
- A. Ostankov
- B. Bloch-Devaux (ORCID: https://orcid.org/0000-0002-2463-1232)
- T. Velas (ORCID: https://orcid.org/0009-0004-0061-1968)
- C. Polivka (ORCID: https://orcid.org/0009-0002-2403-8575)
- R. W. L. Jones (ORCID: https://orcid.org/0000-0002-6427-3513)
- C. Biino (ORCID: https://orcid.org/0000-0002-1397-7246)
- A. Romano (ORCID: https://orcid.org/0000-0003-1779-9122)
- M. Lupi (ORCID: https://orcid.org/0000-0001-9770-6197)
- Y. Petrov (ORCID: https://orcid.org/0000-0003-2643-8740)
- Y. Kudenko (ORCID: https://orcid.org/0000-0003-3204-9426)
- M. Sozzi (ORCID: https://orcid.org/0000-0002-2923-1465)
- M. Corvino (ORCID: https://orcid.org/0000-0002-2401-412X)
- R. Marchevski (ORCID: https://orcid.org/0000-0003-3410-0918)
- S. Lezki (ORCID: https://orcid.org/0000-0002-6909-774X)
- A. Gianoli (ORCID: https://orcid.org/0000-0002-2456-8667)
- M. D’Errico (ORCID: https://orcid.org/0000-0001-5326-1106)
- G. Georgiev (ORCID: https://orcid.org/0000-0001-6884-3942)
- H. Wahl (ORCID: https://orcid.org/0000-0003-0354-2465)
- A. Mukhamejanova (ORCID: https://orcid.org/0009-0004-4799-9066)
- M. B. Brunetti (ORCID: https://orcid.org/0000-0003-1639-3577)
- J. Sanders (ORCID: https://orcid.org/0000-0003-1014-094X)
- A. Sadovskiy (ORCID: https://orcid.org/0000-0002-4448-6845)
- P. Lo Chiatto (ORCID: https://orcid.org/0000-0002-4177-557X)
- V. W. S. Wong (ORCID: https://orcid.org/0000-0001-5975-8164)
- B. Wrona (ORCID: https://orcid.org/0000-0002-1555-0262)
- G. D’Agostini (ORCID: https://orcid.org/0000-0002-6245-875X)
- A. Khotyantsev (ORCID: https://orcid.org/0000-0003-4234-2079)
- S. A. Ghinescu (ORCID: https://orcid.org/0000-0003-3716-9857)
- C. Graham (ORCID: https://orcid.org/0000-0001-9121-460X)
- B. De Martino (ORCID: https://orcid.org/0000-0003-2028-9326)
- M. Perrin‐Terrin (ORCID: https://orcid.org/0000-0002-3568-1956)
- S. Shkarovskiy (ORCID: https://orcid.org/0000-0003-2059-219X)
- M. Pepé (ORCID: https://orcid.org/0000-0001-5624-4010)
- Yu. Potrebenikov (ORCID: https://orcid.org/0000-0003-1437-4129)
- A. Filippi (ORCID: https://orcid.org/0000-0003-4715-8748)
- L. Gatignon (ORCID: https://orcid.org/0000-0001-6439-2945)
- R. Guida
- A. Ceccucci (ORCID: https://orcid.org/0000-0002-9506-866X)
- E. Goudzovski (ORCID: https://orcid.org/0000-0001-9398-4237)
- V. Ryjov
- M. Barbanera (ORCID: https://orcid.org/0000-0002-3616-3341)
- D. Britton (ORCID: https://orcid.org/0000-0001-9998-4342)
- P. Petrov
- A. Biagioni (ORCID: https://orcid.org/0000-0001-5820-1209)
- A. Lonardo (ORCID: https://orcid.org/0000-0002-5909-6508)
- A. Sergi (ORCID: https://orcid.org/0000-0001-9495-6115)
- A. Mapelli (ORCID: https://orcid.org/0000-0002-4128-1019)
- M. Noy
- G. Lehmann Miotto (ORCID: https://orcid.org/0000-0001-9045-7853)
- D. Hutchcroft (ORCID: https://orcid.org/0000-0002-4174-6509)
- H. F. Heath (ORCID: https://orcid.org/0000-0001-6576-9740)
- J.B. Dainton
- J. Kunze
- B. Jenninger
- S. Venditti
- L. Fulton
- A. Fucci
- A. Mefodev
- A. Baeva
- N. De Simone
- A. M. Bragadireanu
- I. Polenkevich
- F. Duval
- T. Capussela
- N. Molokanova
- F. Newson
- A. Korotkova
- R. Page (ORCID: https://orcid.org/0009-0002-4912-2781)
- M. Vormstein
- O. Hutanu (ORCID: https://orcid.org/0009-0002-8658-2373)
- C. Cerri
- E. Gushchin (ORCID: https://orcid.org/0000-0001-8857-1665)
- P. Lubrano (ORCID: https://orcid.org/0000-0003-0221-4806)
- B. Pietrzyk (ORCID: https://orcid.org/0000-0001-8659-4409)
- E. Imbergamo
- S. Padolski (ORCID: https://orcid.org/0000-0002-6795-7670)
- X. Chang (ORCID: https://orcid.org/0000-0002-8792-928X)
- A. Zinchenko
- F. Hahn
- F. Ambrosino (ORCID: https://orcid.org/0000-0001-5577-1820)
- E. Migliore (ORCID: https://orcid.org/0000-0002-2271-5192)
- C. J. Parkinson (ORCID: https://orcid.org/0000-0003-0344-7361)
- C. Lazzeroni (ORCID: https://orcid.org/0000-0003-4074-4787)
- F. Petrucci (ORCID: https://orcid.org/0000-0002-7220-6919)
- C. Sam (ORCID: https://orcid.org/0009-0005-3802-5777)
- Leonardo Plini (ORCID: https://orcid.org/0009-0004-0498-1333)
Institutions
- L. N. Gumilyov Eurasian National University (KZ)
- University of Rome Tor Vergata (IT)
- University of Modena and Reggio Emilia (IT)
- Università degli Studi del Piemonte Orientale “Amedeo Avogadro” (IT)
- Centre National de la Recherche Scientifique (FR)
- Universidad de Guanajuato (MX)
- TRIUMF (CA)
- University of British Columbia (CA)
- Université de Toulon (FR)
- University of Kansas (US)
- University of Liverpool (GB)
- Scuola Normale Superiore (IT)
- George Mason University (US)
- Al-Farabi Kazakh National University (KZ)
- Autonomous University of San Luis Potosí (MX)
- Johannes Gutenberg University Mainz (DE)
- Brookhaven National Laboratory (US)
- Charles University (CZ)
- Aix-Marseille Université (FR)
- University of Würzburg (DE)
- University of Bristol (GB)
- Max Planck Institute for Physics (DE)
- Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering (RO)
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino (IT)
- Lancaster University Ghana (GH)
- Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT)
- Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata (IT)
- Institute for Nuclear Research and Nuclear Energy (BG)
- Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT)
- National Nuclear Center of the Republic of Kazakhstan (KZ)
- Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (IT)
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT)
- Scuola Superiore Meridionale (IT)
- Gran Sasso Science Institute (IT)
- Laboratoire Leprince-Ringuet (FR)
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT)
- École Polytechnique Fédérale de Lausanne (CH)
- Sofia University "St. Kliment Ohridski" (BG)
- Technical University of Munich (DE)
- European Organization for Nuclear Research (CH)
- Lancaster University (GB)
- Université de Strasbourg (FR)
- Comenius University Bratislava (SK)
- Columbia University (US)
- University of Glasgow (GB)
- University of Birmingham (GB)
- Sapienza University of Rome (IT)
- European X-Ray Free-Electron Laser (DE)
- UCLouvain (BE)
- Stanford University (US)
Publication Details
- Journal
- Journal of High Energy Physics
- Published
- 2025-11-24
- DOI
- https://doi.org/10.1007/jhep11(2025)143
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00