Электронный каталог

Статья

Chekhovsky, V.
Search for a Heavy Pseudoscalar Higgs Boson Decaying to a 125 GeV Higgs Boson and a Z Boson in Final States with Two Tau and Two Light Leptons in Proton-Proton Collisions at *%s=13 TeV / V.Chekhovsky, S.Afanasiev, V.Alexakhin, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, O.Kodolova, V.Korenkov, A.Lanev, A.Malakhov, V.Matveev, A.Nikitenko, 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, Z.Tsamalaidze, [CMS Collab.]. – Text : electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 10. – P. 074. – URL: https://doi.org/10.1007/JHEP10(2025)074. – Bibliogr.: 115.

A search for a heavy pseudoscalar Higgs boson, A, decaying to a 125 GeV Higgs boson h and a Z boson is presented. The h boson is identified via its decay to a pair of tau leptons, while the Z boson is identified via its decay to a pair of electrons or muons. The search targets the production of the A boson via the gluon-gluon fusion process, gg → A, and in association with bottom quarks, bb^-A . The analysis uses a data sample corresponding to an integrated luminosity of 138 fb&sup(−1) collected with the CMS detector at the CERN LHC in proton-proton collisions at a centre-of-mass energy of *%s=13 TeV. Constraints are set on the product of the cross sections of the A production mechanisms and the A → Zh decay branching fraction. The observed (expected) upper limit at 95% confidence level ranges from 0.049 (0.060) pb to 1.02 (0.79) pb for the gg → A process and from 0.053 (0.059) pb to 0.79 (0.61) pb for the bb^-A process in the probed range of the A boson mass, mA, from 225 GeV to 1 TeV. The results of the search are used to constrain parameters within the M*1*2*5&sub(h,EFT) benchmark scenario of the minimal supersymmetric extension of the standard model. Values of tan β below 2.2 are excluded in this scenario at 95% confidence level for all m&sub(A) values in the range from 225 to 350 GeV.



ОИЯИ = ОИЯИ (JINR)2025