First search for K + → π + ν ¯ ν using the decay-in-ﬂight technique-猫眼课题宝

首先使用飞行中衰减技术搜索 K + → π + ν ¯ ν

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2019

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E. Gil;E. Minucci;S. Padolski;P. Petrov;B. Velghe;G. Georgiev;V. Kozhuharov;L. Litov;T. Numao;D. Bryman;Jie Fu;T. Husek;K. Kampf;M. Zamkovsky;R. Aliberti;G. Khoriauli;J. Kunze;D. Lomidze;R. Marchevski;L. Peruzzo;M. Vormstein;R. Wanke;P. Dalpiaz;M. Fiorini;E. Gamberini;I. Neri;A. Norton;F. Petrucci;H. Wahl;A. C. Ramusino;A. Gianoli;E. Iacopini;G. Latino;M. Lenti;A. Bizzeti;F. Bucci;R. Volpe;A. Antonelli;G. Lamanna;G. Lanfranchi;G. Mannocchi;S. Martellotti;M. Moulson;M. Raggi;T. Spadaro;F. Ambrosino;T. Capussela;M. Corvino;D. Filippo;P. Massarotti;M. Mirra;M. Napolitano;G. Saracino;G. Anzivino;F. Brizioli;E. Imbergamo;R. Lollini;C. Santoni;M. Barbanera;P. Cenci;B. Checcucci;V. Duk;P. Lubrano;M. Lupi;M. Pepe;M. Piccini;F. Costantini;L. Lella;N. Doble;M. Giorgi;S. Giudici;E. Pedreschi;M. Sozzi;C. Cerri;R. Fantechi;R. Piandani;J. Pinzino;L. Pontisso;F. Spinella;I. Mannelli;G. D'Agostini;A. Biagioni;E. Leonardi;A. Lonardo;P. Valente;P. Vicini;R. Ammendola;V. Bonaiuto;L. Federici;A. Fucci;A. Salamon;F. Sargeni;R. Arcidiacono;B. Bloch;M. Boretto;E. Menichetti;E. Migliore;D. Soldi;C. Biino;A. Filippi;F. Marchetto;J. Engelfried;N. Estrada;A. Bragadireanu;S. Ghinescu;O. Hutanu;T. Enik;V. Falaleev;V. Kekelidze;A. Korotkova;D. Madigozhin;M. Misheva;N. Molokanova;S. Movchan;I. Polenkevich;Y. Potrebenikov;S. Shkarovskiy;A. Zinchenko;S. Fedotov;E. Gushchin;A. Khotyantsev;A. Kleimenova;Y. Kudenko;V. Kurochka;Masha Medvedeva;A. Mefodev;A. Shaikhiev;S. Kholodenko;V. Kurshetsov;V. Obraztsov;A. Ostankov;V. Semenov;V. Sugonyaev;O. Yushchenko;L. Bician;T. Blažek;V. Cerný;M. Koval;Z. Kučerová;A. Ceccucci;H. Danielsson;N. Simone;F. Duval;B. Döbrich;L. Gatignon;R. Guida;F. Hahn;B. Jenninger;P. Laycock;G. Miotto;P. Lichard;A. Mapelli;K. Massri;M. Noy;V. Palladino;M. Perrin;V. Ryjov;S. Venditti;M. Brunetti;V. Fascianelli;F. Gonnella;E. Goudzovski;L. Iacobuzio;C. Lazzeroni;N. Lurkin;F. Newson;C. Parkinson;A. Romano;A. Sergi;A. Sturgess;J. Swallow;H. Heath;R. Page;S. Trilov;B. Angelucci;D. Britton;C. Graham;D. Protopopescu;J. Dainton;J. Fry;L. Fulton;D. Hutchcroft;E. Maurice;G. Ruggiero;B. Wrona;A. Conovaloff;P. Cooper;D. Coward;P. Rubin

CERN SPS的NA 62实验报告了第一次使用光衰减技术对K + → π + ν ν的搜索，基于1的样本。2016年收集的21 × 10 11 K +衰变。单事件灵敏度为3。15 × 10 − 10，相当于0.267个标准模型事件。当预期背景为0.152个事件时，观察到一个信号候选。这导致在95%CL时K + → π + ν <$ν分支比的上限为14 × 10 − 10。© 2019作者。由爱思唯尔公司出版。这是一篇开放获取的文章，使用CC BY许可证（http：//creativecommons.org/licenses/by/4.0/）。由SCOAP 3提供资金。

The NA62 experiment at the CERN SPS reports the ﬁrst search for K + → π + ν ¯ ν using the decay-in-ﬂight technique, based on a sample of 1 . 21 × 10 11 K + decays collected in 2016. The single event sensitivity is 3 . 15 × 10 − 10 , corresponding to 0.267 Standard Model events. One signal candidate is observed while the expected background is 0.152 events. This leads to an upper limit of 14 × 10 − 10 on the K + → π + ν ¯ ν branching ratio at 95% CL. © 2019 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP 3 .

First search for K + → π + ν ¯ ν using the decay-in-ﬂight technique

首先使用飞行中衰减技术搜索 K + → π + ν ¯ ν

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