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  • Measurement of the top quar...
    Del Valle, A. Escalante; Krätschmer, I.; Liko, D.; Wulz, C.-E.; Chekhovsky, V.; Lowette, S.; Luetic, J.; Starling, E.; Magitteri, A.; Ahmad, M.; Chen, M.; Ban, Y.; Courbon, B.; Godinovic, N.; Lelas, D.; Nicolaou, C.; Ille, B.; Asawatangtrakuldee, C.; Martínez, A. Bermúdez; Campbell, A.; Eckerlin, G.; Shevchenko, R.; Schumann, S.; Steinbrück, G.; Butz, E.; Heindl, S. M.; Quast, G.; Swain, S. K.; Singh, J. B.; Jha, V.; Borgonovi, L.; Cavallo, F. R.; Zuolo, D.; Buontempo, S.; Gasparini, U.; Lujan, P.; Rossin, R.; Tiko, A.; Tosi, M.; Re, V.; Ciocci, M. A.; Arneodo, M.; Maselli, S.; Soldi, D.; Lee, J.; Moon, C. S.; Sekmen, S.; Ibarguen, H. A. Salazar; Bargassa, P.; Skatchkov, N.; Chistov, R.; Hernandez, J. M.; Moran, D.; Cruz, S. Sanchez; Auffray, E.; Chapon, E.; Innocenti, G. M.; Malgeri, L.; Hits, D.; Kilminster, B.; Takahashi, Y.; Steen, A.; Ozdemir, K.; Cakir, A.; Brooke, J. J.; Clement, E.; Heath, G. P.; Manolopoulos, K.; Malik, S.; Zenz, S. C.; Gastler, D.; Erbacher, R.; Pellett, D.; Cousins, R.; Schnaible, C.; Gary, J. W.; Campagnari, C.; Datta, A.; Joshi, Y. R.; Saunders, M.; Yumiceva, F.; Mills, C.; Varelas, N.; Roskes, J.; Benvenuti, A. C.; Kalafut, S.; Planer, M.; Khukhunaishvili, A.; Osherson, M.; Spanier, S.; Huang, T.; Mengke, T.; Undleeb, S.; Johns, W.; Sheldon, P.; Ledovskoy, A.; Poudyal, N.; De Bruyn, I.; Herndon, M.; Loveless, R.

    The European physical journal. C, Particles and fields, 04/2019, Letnik: 79, Številka: 4
    Journal Article

    A top quark mass measurement is performed using 35.9 fb - 1 of LHC proton–proton collision data collected with the CMS detector at s = 13 TeV . The measurement uses the t t ¯ all-jets final state. A kinematic fit is performed to reconstruct the decay of the t t ¯  system and suppress the multijet background. Using the ideogram method, the top quark mass ( m t ) is determined, simultaneously constraining an additional jet energy scale factor ( JSF ). The resulting value of m t = 172.34 ± 0.20 (stat+JSF) ± 0.70 (syst) GeV is in good agreement with previous measurements. In addition, a combined measurement that uses the t t ¯ lepton+jets and all-jets final states is presented, using the same mass extraction method, and provides an m t measurement of 172.26 ± 0.07 (stat+JSF) ± 0.61 (syst) GeV . This is the first combined m t extraction from the lepton+jets and all-jets channels through a single likelihood function.