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Search for Higgs boson decay to a charm quark-antiquark pair in proton-proton collisions at s=13 TeV

Abstract: A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H -> c¯c, produced in association with a leptonically decaying V (W or Z) boson is presented. The search is performed with proton-proton collisions at s p ¼ 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb-1. Novel charm jet identification and analysis methods using machine learning techniques are employed. The analysis is validated by searching for Z -> c¯c in VZ events, leading to its first observation at a hadron collider with a significance of 5.7 standard deviations. The observed (expected) upper limit on (VH)B(H -> c¯c) is 0.94 (0.50 +0.22 -0.15)pb at 95% confidence level (C.L.), corresponding to 14 (7.6 +3.4 -2.3 ) times the standard model prediction. For the Higgs-charm Yukawa coupling modifier, ?c, the observed (expected) 95% C.L. interval is 1.1 < |Kc| < 5.5 (|kC| < 3.4), the most stringent constraint to date.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Tumasyan A., Adam W., Andrejkovic J.W., Bergauer T., Chatterjee S., Damanakis K., Dragicevic M., Escalante Del Valle A., Hussain P.S., Jeitler M., Krammer N., Lechner L., Liko D., Mikulec I., Paulitsch P., Pitters F.M., Schieck J., Schöfbeck R., Schwarz D., Templ S., Waltenberger W., Wulz C.E., Darwish M.R., Janssen T., Kello T., Rejeb Sfar H., Van Mechelen P., Bols E.S., D'Hondt J., De Moor A., Delcourt M., El Faham H., Lowette S.,

 Fuente: Physical review letters, 2023, 131(6), 061801

Editorial: American Physical Society

 Fecha de publicación: 01/08/2023

Nº de páginas: 21

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.131.061801

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.131.061801

Autoría

TUMASYAN, A.

JAVIER ANDRES BROCHERO CIFUENTES

MARCOS FERNANDEZ GARCIA

PEDRO JOSE FERNANDEZ MANTECA

ANDREA GARCIA ALONSO

CLARA LASAOSA GARCIA

PABLO MATORRAS CUEVAS

CEDRIC GERALD PRIEELS