Observation of the J/ps -->m+m-m+m- decay in proton-proton collisions at Vs= 13 Te V

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URI: https://hdl.handle.net/10902/36099
ISSN: 2470-0010
ISSN: 2470-0029
ISSN: 1550-7998
ISSN: 1550-2368
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Autoría
Hayrapetyan, A.; Bhowmik, Sandeep; Blanco Fernández, SergioAutoridad Unican; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José Ibán; Calderón Tazón, AliciaAutoridad Unican; Duarte Campderros, JorgeAutoridad Unican; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; Lasaosa García, Clara; López Ruiz, Rubén; Martínez Rivero, Celso; Martínez Ruiz del Árbol, PabloAutoridad Unican; Matorras Weinig, FranciscoAutoridad Unican; Matorras Cuevas, PabloAutoridad Unican; Navarrete Ramos, Efrén; Piedra Gómez, JonatanAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vila Álvarez, IvánAutoridad Unican; [et al.]
Fecha
2024-06-06
Derechos
© 2024 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Funded by SCOAP3.
Publicado en
Physical Review D, 2024, 109(11), L111101
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American Physical Society
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Resumen/Abstract
The J/ps -->m+m-m+m- decay has been observed with a statistical significance in excess of five standard deviations. The analysis is based on an event sample of proton-proton collisions at a center-of mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 33.6 fb-1. Normalizing to theJ/ps -->m+m- decay mode leads to a branching fraction of ½10.1þ3.3 -2.7 (stat) +-0.4 (syst)] x 10-7, a value that is consistent with the standard model prediction.
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© 2024 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Funded by SCOAP3.Excepto si se señala otra cosa, la licencia del ítem se describe como © 2024 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Funded by SCOAP3.