학술논문
Measurement of the differential tt¯ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks.
Document Type
article
Author
Tumasyan, A; Adam, W; Andrejkovic, J; Bergauer, T; Chatterjee, S; Damanakis, K; Dragicevic, M; Valle, A; Hussain, P; Jeitler, M; Krammer, N; Lechner, L; Liko, D; Mikulec, I; Paulitsch, P; Pitters, F; Schieck, J; Schöfbeck, R; Schwarz, D; Templ, S; Waltenberger, W; Wulz, C-E; Darwish, M; Janssen, T; Kello, T; Sfar, H; Mechelen, P; Bols, E; DHondt, J; De Moor, A; Delcourt, M; Faham, H; Lowette, S; Moortgat, S; Morton, A; Müller, D; Sahasransu, A; Tavernier, S; Doninck, W; Vannerom, D; Clerbaux, B; De Lentdecker, G; Favart, L; Hohov, D; Jaramillo, J; Lee, K; Mahdavikhorrami, M; Makarenko, I; Malara, A; Paredes, S; Pétré, L; Postiau, N; Thomas, L; Bemden, M; Velde, C; Vanlaer, P; Dobur, D; Knolle, J; Lambrecht, L; Mestdach, G; Niedziela, M; Rendón, C; Roskas, C; Samalan, A; Skovpen, K; Tytgat, M; Bossche, N; Vermassen, B; Wezenbeek, L; Benecke, A; Bruno, G; Bury, F; Caputo, C; David, P; Delaere, C; Donertas, I; Giammanco, A; Jaffel, K; Jain, Sa; Lemaitre, V; Mondal, K; Taliercio, A; Tran, T; Vischia, P; Wertz, S; Alves, G; Coelho, E; Hensel, C; Moraes, A; Teles, P; Júnior, W; Pereira, M; Filho, M; Malbouisson, H; Carvalho, W; Chinellato, J; Da Costa, E; Da Silveira, G; De Jesus Damiao, D; Sousa, V
Source
European Physical Journal C: Particles and Fields. 83(7)
Subject
Language
Abstract
A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton + jets channel of top quark pair production (tt¯) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400GeV. The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138fb-1. The differential tt¯ production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modelling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of 173.06±0.84GeV.