Электронный каталог

Статья

Tumasyan, A.
Search for Higgs Boson Decay to a Charm Quark-Antiquark Pair in Proton-Proton Collisions at *%s = 13  TeV / A.Tumasyan, S.Afanasiev, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, M.Savina, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, N.Voytishin, B.S.Yuldashev, A.Zarubin, I.Zhizhin, N.Krasnikov, M.Finger, M.Finger Jr., Z.Tsamalaidze, [CMS Collab.] // Physical Review Letters [Electronic resource]. – 2023. – Vol.131, No.6. – P. 061801. – URL: https://doi.org/10.1103/PhysRevLett.131.061801. – Bibliogr.: 102.

A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H *> cc^-, produced in association with a leptonically decaying V (W or Z) boson is presented. The search is performed with proton-proton collisions at *%s = 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 *> cc^- 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 *s(VH)B(H *>c c^-) is 0.94 (0.50&sub(−0.15)&sup(+0.22))pb at 95% confidence level (C.L.), corresponding to 14 (7.6&sub(−2.3)&sup(+3.4)) times the standard model prediction. For the Higgs-charm Yukawa coupling modifier, κ&sub(c), the observed (expected) 95% C.L. interval is 1.1<|κ&sub(c)| < 5.5 (|κ&sub(c)|<3.4), the most stringent constraint to date



Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 346.6е2 - Промежуточные бозоны
ОИЯИ = ОИЯИ (JINR)2023