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Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio

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Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio. / Cortina Gil, E.; Jerhot, J.; Lurkin, N. et al.
In: Journal of High Energy Physics, Vol. 2025, No. 2, 191, 27.02.2025.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Cortina Gil, E, Jerhot, J, Lurkin, N, Numao, T, Velghe, B, Wong, VWS, Bryman, D, Hives, Z, Husek, T, Kampf, K, Kolesar, M, Koval, M, De Martino, B, Perrin-Terrin, M, Petit, L, Döbrich, B, Lezki, S, Schubert, J, Akmete, AT, Aliberti, R, Ceoletta, M, Di Lella, L, Doble, N, Peruzzo, L, Polivka, C, Schuchmann, S, Wahl, H, Wanke, R, Dalpiaz, P, Negrello, R, Neri, I, Petrucci, F, Soldani, M, Bandiera, L, Canale, N, Cotta Ramusino, A, Gianoli, A, Romagnoni, M, Sytov, A, Lenti, M, Lo Chiatto, P, Panichi, I, Ruggiero, G, Bizzeti, A, Bucci, F, Antonelli, A, Kozhuharov, V, Lanfranchi, G, Martellotti, S, Moulson, M, Spadaro, T, Tinti, G, Ambrosino, F, D’Errico, M, Fiorenza, R, Francesconi, M, Giordano, R, Massarotti, P, Mirra, M, Napolitano, M, Rosa, I, Saracino, G, Anzivino, G, Cenci, P, Duk, V, Lollini, R, Lubrano, P, Pepe, M, Piccini, M, Costantini, F, Giorgi, M, Giudici, S, Lamanna, G, Lari, E, Pedreschi, E, Pinzino, J, Sozzi, M, Fantechi, R, Spinella, F, Mannelli, I, Raggi, M, Biagioni, A, Cretaro, P, Frezza, O, Lonardo, A, Turisini, M, Vicini, P, Ammendola, R, Bonaiuto, V, Fucci, A, Salamon, A, Sargeni, F, Arcidiacono, R, Bloch-Devaux, B, Menichetti, E, Migliore, E, Biino, C, Filippi, A, Marchetto, F, Soldi, D, Mukhamejanov, Y, Mukhamejanova, A, Saduyev, N, Sakhiyev, S, Briano Olvera, A, Engelfried, J, Estrada-Tristan, N, Piandani, R, Reyes Santos, MA, Rodriguez Rivera, KA, Boboc, P, Bragadireanu, AM, Ghinescu, SA, Hutanu, OE, Blazek, T, Cerny, V, Velas, T, Volpe, R, Bernhard, J, Bician, L, Boretto, M, Brizioli, F, Ceccucci, A, Corvino, M, Danielsson, H, Duval, F, Federici, L, Gamberini, E, Guida, R, Holzer, EB, Jenninger, B, Kucerova, Z, Lehmann Miotto, G, Lichard, P, Massri, K, Minucci, E, Noy, M, Ryjov, V, Swallow, J, Zamkovsky, M, Chang, X, Kleimenova, A, Marchevski, R, Fry, JR, Gonnella, F, Goudzovski, E, Henshaw, J, Kenworthy, C, Lazzeroni, C, Parkinson, C, Romano, A, Sam, C, Sanders, J, Sergi, A, Shaikhiev, A, Tomczak, A, Heath, H, Britton, D, Norton, A, Protopopescu, D, Dainton, JB, Gatignon, L, Jones, RWL, Cooper, P, Coward, D, Rubin, P, Baeva, A, Baigarashev, D, Bautin, V, Emelyanov, D, Enik, T, Falaleev, V, Kekelidze, V, Kereibay, D, Korotkova, A, Litov, L, Madigozhin, D, Misheva, M, Molokanova, N, Polenkevich, I, Potrebenikov, Y, Salamatin, K, Shkarovskiy, S, Fedotov, S, Gorshanov, K, Gushchin, E, Kholodenko, S, Khotyantsev, A, Kudenko, Y, Kurochka, V, Kurshetsov, V, Mefodev, A, Obraztsov, V, Okhotnikov, A, Sadovskiy, A, Sugonyaev, V & Yushchenko, O 2025, 'Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio', Journal of High Energy Physics, vol. 2025, no. 2, 191. https://doi.org/10.1007/jhep02(2025)191

APA

Cortina Gil, E., Jerhot, J., Lurkin, N., Numao, T., Velghe, B., Wong, V. W. S., Bryman, D., Hives, Z., Husek, T., Kampf, K., Kolesar, M., Koval, M., De Martino, B., Perrin-Terrin, M., Petit, L., Döbrich, B., Lezki, S., Schubert, J., Akmete, A. T., ... Yushchenko, O. (2025). Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio. Journal of High Energy Physics, 2025(2), Article 191. https://doi.org/10.1007/jhep02(2025)191

Vancouver

Cortina Gil E, Jerhot J, Lurkin N, Numao T, Velghe B, Wong VWS et al. Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio. Journal of High Energy Physics. 2025 Feb 27;2025(2):191. doi: 10.1007/jhep02(2025)191

Author

Cortina Gil, E. ; Jerhot, J. ; Lurkin, N. et al. / Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio. In: Journal of High Energy Physics. 2025 ; Vol. 2025, No. 2.

Bibtex

@article{d1a6475e92b54f9c94354fea5b862e89,
title = "Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio",
abstract = "A measurement of the K+→π+νν¯ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to the beamline and detectors, at a higher instantaneous beam intensity with respect to the 2016–2018 data taking. Combining NA62 data collected in 2016–2022, a measurement of BK+→π+νν¯=13.0−3.0+3.3×10−11 is reported. With 51 signal candidates observed and an expected background of 18−2+3 events, BK+→π+νν¯ becomes the smallest branching ratio measured with a signal significance above 5σ.",
keywords = "Flavour Physics, Rare Decay, Other Experiments, Branching fraction",
author = "{Cortina Gil}, E. and J. Jerhot and N. Lurkin and T. Numao and B. Velghe and Wong, {V. W. S.} and D. Bryman and Z. Hives and T. Husek and K. Kampf and M. Kolesar and M. Koval and {De Martino}, B. and M. Perrin-Terrin and L. Petit and B. D{\"o}brich and S. Lezki and J. Schubert and Akmete, {A. T.} and R. Aliberti and M. Ceoletta and {Di Lella}, L. and N. Doble and L. Peruzzo and C. Polivka and S. Schuchmann and H. Wahl and R. Wanke and P. Dalpiaz and R. Negrello and I. Neri and F. Petrucci and M. Soldani and L. Bandiera and N. Canale and {Cotta Ramusino}, A. and A. Gianoli and M. Romagnoni and A. Sytov and M. Lenti and {Lo Chiatto}, P. and I. Panichi and G. Ruggiero and A. Bizzeti and F. Bucci and A. Antonelli and V. Kozhuharov and G. Lanfranchi and S. Martellotti and M. Moulson and T. Spadaro and G. Tinti and F. Ambrosino and M. D{\textquoteright}Errico and R. Fiorenza and M. Francesconi and R. Giordano and P. Massarotti and M. Mirra and M. Napolitano and I. Rosa and G. Saracino and G. Anzivino and P. Cenci and V. Duk and R. Lollini and P. Lubrano and M. Pepe and M. Piccini and F. Costantini and M. Giorgi and S. Giudici and G. Lamanna and E. Lari and E. Pedreschi and J. Pinzino and M. Sozzi and R. Fantechi and F. Spinella and I. Mannelli and M. Raggi and A. Biagioni and P. Cretaro and O. Frezza and A. Lonardo and M. Turisini and P. Vicini and R. Ammendola and V. Bonaiuto and A. Fucci and A. Salamon and F. Sargeni and R. Arcidiacono and B. Bloch-Devaux and E. Menichetti and E. Migliore and C. Biino and A. Filippi and F. Marchetto and D. Soldi and Y. Mukhamejanov and A. Mukhamejanova and N. Saduyev and S. Sakhiyev and {Briano Olvera}, A. and J. Engelfried and N. Estrada-Tristan and R. Piandani and {Reyes Santos}, {M. A.} and {Rodriguez Rivera}, {K. A.} and P. Boboc and Bragadireanu, {A. M.} and Ghinescu, {S. A.} and Hutanu, {O. E.} and T. Blazek and V. Cerny and T. Velas and R. Volpe and J. Bernhard and L. Bician and M. Boretto and F. Brizioli and A. Ceccucci and M. Corvino and H. Danielsson and F. Duval and L. Federici and E. Gamberini and R. Guida and Holzer, {E. B.} and B. Jenninger and Z. Kucerova and {Lehmann Miotto}, G. and P. Lichard and K. Massri and E. Minucci and M. Noy and V. Ryjov and J. Swallow and M. Zamkovsky and X. Chang and A. Kleimenova and R. Marchevski and Fry, {J. R.} and F. Gonnella and E. Goudzovski and J. Henshaw and C. Kenworthy and C. Lazzeroni and C. Parkinson and A. Romano and C. Sam and J. Sanders and A. Sergi and A. Shaikhiev and A. Tomczak and H. Heath and D. Britton and A. Norton and D. Protopopescu and Dainton, {J. B.} and L. Gatignon and Jones, {R. W. L.} and P. Cooper and D. Coward and P. Rubin and A. Baeva and D. Baigarashev and V. Bautin and D. Emelyanov and T. Enik and V. Falaleev and V. Kekelidze and D. Kereibay and A. Korotkova and L. Litov and D. Madigozhin and M. Misheva and N. Molokanova and I. Polenkevich and Yu. Potrebenikov and K. Salamatin and S. Shkarovskiy and S. Fedotov and K. Gorshanov and E. Gushchin and S. Kholodenko and A. Khotyantsev and Y. Kudenko and V. Kurochka and V. Kurshetsov and A. Mefodev and V. Obraztsov and A. Okhotnikov and A. Sadovskiy and V. Sugonyaev and O. Yushchenko",
year = "2025",
month = feb,
day = "27",
doi = "10.1007/jhep02(2025)191",
language = "English",
volume = "2025",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer-Verlag",
number = "2",

}

RIS

TY - JOUR

T1 - Observation of the K + → π + ν ν ¯ decay and measurement of its branching ratio

AU - Cortina Gil, E.

AU - Jerhot, J.

AU - Lurkin, N.

AU - Numao, T.

AU - Velghe, B.

AU - Wong, V. W. S.

AU - Bryman, D.

AU - Hives, Z.

AU - Husek, T.

AU - Kampf, K.

AU - Kolesar, M.

AU - Koval, M.

AU - De Martino, B.

AU - Perrin-Terrin, M.

AU - Petit, L.

AU - Döbrich, B.

AU - Lezki, S.

AU - Schubert, J.

AU - Akmete, A. T.

AU - Aliberti, R.

AU - Ceoletta, M.

AU - Di Lella, L.

AU - Doble, N.

AU - Peruzzo, L.

AU - Polivka, C.

AU - Schuchmann, S.

AU - Wahl, H.

AU - Wanke, R.

AU - Dalpiaz, P.

AU - Negrello, R.

AU - Neri, I.

AU - Petrucci, F.

AU - Soldani, M.

AU - Bandiera, L.

AU - Canale, N.

AU - Cotta Ramusino, A.

AU - Gianoli, A.

AU - Romagnoni, M.

AU - Sytov, A.

AU - Lenti, M.

AU - Lo Chiatto, P.

AU - Panichi, I.

AU - Ruggiero, G.

AU - Bizzeti, A.

AU - Bucci, F.

AU - Antonelli, A.

AU - Kozhuharov, V.

AU - Lanfranchi, G.

AU - Martellotti, S.

AU - Moulson, M.

AU - Spadaro, T.

AU - Tinti, G.

AU - Ambrosino, F.

AU - D’Errico, M.

AU - Fiorenza, R.

AU - Francesconi, M.

AU - Giordano, R.

AU - Massarotti, P.

AU - Mirra, M.

AU - Napolitano, M.

AU - Rosa, I.

AU - Saracino, G.

AU - Anzivino, G.

AU - Cenci, P.

AU - Duk, V.

AU - Lollini, R.

AU - Lubrano, P.

AU - Pepe, M.

AU - Piccini, M.

AU - Costantini, F.

AU - Giorgi, M.

AU - Giudici, S.

AU - Lamanna, G.

AU - Lari, E.

AU - Pedreschi, E.

AU - Pinzino, J.

AU - Sozzi, M.

AU - Fantechi, R.

AU - Spinella, F.

AU - Mannelli, I.

AU - Raggi, M.

AU - Biagioni, A.

AU - Cretaro, P.

AU - Frezza, O.

AU - Lonardo, A.

AU - Turisini, M.

AU - Vicini, P.

AU - Ammendola, R.

AU - Bonaiuto, V.

AU - Fucci, A.

AU - Salamon, A.

AU - Sargeni, F.

AU - Arcidiacono, R.

AU - Bloch-Devaux, B.

AU - Menichetti, E.

AU - Migliore, E.

AU - Biino, C.

AU - Filippi, A.

AU - Marchetto, F.

AU - Soldi, D.

AU - Mukhamejanov, Y.

AU - Mukhamejanova, A.

AU - Saduyev, N.

AU - Sakhiyev, S.

AU - Briano Olvera, A.

AU - Engelfried, J.

AU - Estrada-Tristan, N.

AU - Piandani, R.

AU - Reyes Santos, M. A.

AU - Rodriguez Rivera, K. A.

AU - Boboc, P.

AU - Bragadireanu, A. M.

AU - Ghinescu, S. A.

AU - Hutanu, O. E.

AU - Blazek, T.

AU - Cerny, V.

AU - Velas, T.

AU - Volpe, R.

AU - Bernhard, J.

AU - Bician, L.

AU - Boretto, M.

AU - Brizioli, F.

AU - Ceccucci, A.

AU - Corvino, M.

AU - Danielsson, H.

AU - Duval, F.

AU - Federici, L.

AU - Gamberini, E.

AU - Guida, R.

AU - Holzer, E. B.

AU - Jenninger, B.

AU - Kucerova, Z.

AU - Lehmann Miotto, G.

AU - Lichard, P.

AU - Massri, K.

AU - Minucci, E.

AU - Noy, M.

AU - Ryjov, V.

AU - Swallow, J.

AU - Zamkovsky, M.

AU - Chang, X.

AU - Kleimenova, A.

AU - Marchevski, R.

AU - Fry, J. R.

AU - Gonnella, F.

AU - Goudzovski, E.

AU - Henshaw, J.

AU - Kenworthy, C.

AU - Lazzeroni, C.

AU - Parkinson, C.

AU - Romano, A.

AU - Sam, C.

AU - Sanders, J.

AU - Sergi, A.

AU - Shaikhiev, A.

AU - Tomczak, A.

AU - Heath, H.

AU - Britton, D.

AU - Norton, A.

AU - Protopopescu, D.

AU - Dainton, J. B.

AU - Gatignon, L.

AU - Jones, R. W. L.

AU - Cooper, P.

AU - Coward, D.

AU - Rubin, P.

AU - Baeva, A.

AU - Baigarashev, D.

AU - Bautin, V.

AU - Emelyanov, D.

AU - Enik, T.

AU - Falaleev, V.

AU - Kekelidze, V.

AU - Kereibay, D.

AU - Korotkova, A.

AU - Litov, L.

AU - Madigozhin, D.

AU - Misheva, M.

AU - Molokanova, N.

AU - Polenkevich, I.

AU - Potrebenikov, Yu.

AU - Salamatin, K.

AU - Shkarovskiy, S.

AU - Fedotov, S.

AU - Gorshanov, K.

AU - Gushchin, E.

AU - Kholodenko, S.

AU - Khotyantsev, A.

AU - Kudenko, Y.

AU - Kurochka, V.

AU - Kurshetsov, V.

AU - Mefodev, A.

AU - Obraztsov, V.

AU - Okhotnikov, A.

AU - Sadovskiy, A.

AU - Sugonyaev, V.

AU - Yushchenko, O.

PY - 2025/2/27

Y1 - 2025/2/27

N2 - A measurement of the K+→π+νν¯ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to the beamline and detectors, at a higher instantaneous beam intensity with respect to the 2016–2018 data taking. Combining NA62 data collected in 2016–2022, a measurement of BK+→π+νν¯=13.0−3.0+3.3×10−11 is reported. With 51 signal candidates observed and an expected background of 18−2+3 events, BK+→π+νν¯ becomes the smallest branching ratio measured with a signal significance above 5σ.

AB - A measurement of the K+→π+νν¯ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to the beamline and detectors, at a higher instantaneous beam intensity with respect to the 2016–2018 data taking. Combining NA62 data collected in 2016–2022, a measurement of BK+→π+νν¯=13.0−3.0+3.3×10−11 is reported. With 51 signal candidates observed and an expected background of 18−2+3 events, BK+→π+νν¯ becomes the smallest branching ratio measured with a signal significance above 5σ.

KW - Flavour Physics

KW - Rare Decay

KW - Other Experiments

KW - Branching fraction

U2 - 10.1007/jhep02(2025)191

DO - 10.1007/jhep02(2025)191

M3 - Journal article

VL - 2025

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 2

M1 - 191

ER -