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Статья

Hayrapetyan, A.
Search for Bottom-Type Vectorlike Quark Pair Production in Dileptonic and Fully Hadronic Final States in Proton-Proton Collisions at *%s=13 TeV / A.Hayrapetyan, S.Afanasiev, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, N.Krasnikov, 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, Z.Tsamalaidze, [CMS Collab.] // Physical Review D [Electronic resource]. – 2024. – Vol. 110, No. 5. – P. 052004. – URL: https://doi.org/10.1103/PhysRevD.110.052004. – Bibliogr.: 75.

A search is described for the production of a pair of bottom-type vectorlike quarks (𝐵 VLQs) with mass greater than 1000 GeV. Each 𝐵 VLQ decays into a 𝑏 quark and a Higgs boson, a 𝑏 quark and a 𝑍 boson, or a 𝑡 quark and a 𝑊 boson. This analysis considers both fully hadronic final states and those containing a charged lepton pair from a 𝑍 boson decay. The products of the 𝐻→𝑏⁢𝑏 boson decay and of the hadronic 𝑍 or 𝑊 boson decays can be resolved as two distinct jets or merged into a single jet, so the final states are classified by the number of reconstructed jets. The analysis uses data corresponding to an integrated luminosity of 138  fb&sup(−1) collected in proton-proton collisions at √𝑠=13  TeV with the CMS detector at the LHC from 2016 to 2018. No excess over the expected background is observed. Lower limits are set on the 𝐵 VLQ mass at the 95% confidence level. These depend on the 𝐵 VLQ branching fractions and are 1570 and 1540 GeV for 100% 𝐵→𝑏⁢𝐻 and 100% 𝐵→𝑏⁢𝑍, respectively. In most cases, the mass limits obtained exceed previous limits by at least 100 GeV.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами