Электронный каталог

Статья

Hayrapetyan, A.
Measurement of the Inclusive tt^- Cross Section in Final States with at Least One Lepton and Additional Jets with 302 pb*-*1 of pp Collisions at *%s=5.02 TeV / A.Hayrapetyan, S.Afanasiev, V.Alexakhin, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, N.Krasnikov, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, S.Polikarpov, 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. 4. – P. 099. – URL: https://doi.org/10.1007/JHEP04(2025)099. – Bibliogr.: 67.

A measurement of the top quark pair (tt^-) production cross section in protonproton collisions at a centre-of-mass energy of 5.02 TeV is presented. The data were collected at the LHC in autumn 2017, in dedicated runs with low-energy and low-intensity conditions with respect to the default confguration, and correspond to an integrated luminosity of 302 pb*−*1 . The measurement is performed using events with one electron or muon, and multiple jets, at least one of them being identifed as originating from a b quark (b tagged). Events are classifed based on the number of all reconstructed jets and of b-tagged jets. Multivariate analysis techniques are used to enhance the separation between the signal and backgrounds. The measured cross section is 62.5 ± 1.6 (stat)&sup(+2.6)&sub(−2.5) (syst) ± 1.2 (lumi) pb. A combination with the result in the dilepton channel based on the same data set yields a value of 62.3±1.5 (stat)±2.4 (syst)±1.2 (lumi) pb, to be compared with the standard model prediction of 69.5&sup(+3.5)&sub(−3.7) pb at next-to-next-to-leading order in perturbative quantum chromodynamics.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков