Measurement of the top quark mass using charged particles in pp collisions at $\sqrt s =$ 8 TeV

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2016 United Kingdom, United Kingdom, United States, Italy, Brazil, Greece, Italy, Belgium, Italy, Italy, Germany, Turkey, Italy, Italy, Italy, Italy English Publisher:RWTH Aachen University

Authors: Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; Bergauer, T; Brandstetter, J; +193 Authors

Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; Bergauer, T; Brandstetter, J; Brondolin, E; Dragicevic, M; Ero, J; Flechl, M; Friedl, M; Fruhwirth, R; Ghete, VM; Hartl, C; Hormann, N; Hrubec, J; Jeitler, M; Konig, A; Krammer, M; Kratschmer, I; Liko, D; Matsushita, T; Mikulec, I; Rabady, D; Rad, N; Rahbaran, B; Rohringer, H; Schieck, J; Strauss, J; Treberer-Treberspurg, W; Waltenberger, W; Wulz, CE; Mossolov, V; Shumeiko, N; Gonzalez, JS; Alderweireldt, S; Cornelis, T; De Wolf, EA; Janssen, X; Knutsson, A; Lauwers, J; Luyckx, S; Van De Klundert, M; Van Haevermaet, H; Van Mechelen, P; Van Remortel, N; Van Spilbeeck, A; Abu Zeid, S; Blekman, F; D'Hondt, J; Daci, N; De Bruyn, I; Deroover, K; Heracleous, N; Keaveney, J; Lowette, S; Moortgat, S; Moreels, L; Olbrechts, A; Python, Q; Strom, D; Tavernier, S; Van Doninck, W; Van Mulders, P; Van Parijs, I; Brun, H; Caillol, C; Clerbaux, B; De Lentdecker, G; Fasanella, G; Favart, L; Goldouzian, R; Grebenyuk, A; Karapostoli, G; Lenzi, T; Leonard, A; Maerschalk, T; Marinov, A; Randle-conde, A; Seva, T; Vander Velde, C; Vanlaer, P; Yonamine, R; Zenoni, F; Zhang, F; Benucci, L; Cimmino, A; Crucy, S; Dobur, D; Fagot, A; Garcia, G; Gul, M; Mccartin, J; Rios, AAO; Poyraz, D; Ryckbosch, D; Salva, S; Schofbeck, R; Sigamani, M; Tytgat, M; Van Driessche, W; Yazgan, E; Zaganidis, N; Beluffi, C; Bondu, O; Brochet, S; Bruno, G; Caudron, A; Ceard, L; De Visscher, S; Delaere, C; Delcourt, M; Forthomme, L; Francois, B; Giammanco, A; Jafari, A; Jez, P; Komm, M; Lemaitre, V; Magitteri, A; Mertens, A; Musich, M; Nuttens, C; Piotrzkowski, K; Quertenmont, L; Selvaggi, M; Marono, MV; Wertz, S; Beliy, N; Hammad, GH; Alda, WL; Alves, FL; Alves, GA; Brito, L; Martins, MC; Hamer, M; Hensel, C; Moraes, A; Pol, ME; Teles, PR; Das Chagas, EBB; Carvalho, W; Chinellato, J; Custodio, A; Da Costa, EM; Damiao, DDJ; Martins, CDO; De Souza, SF; Guativa, LMH; Malbouisson, H; Figueiredo, DM; Herrera, CM; Mundim, L; Nogima, H; Da Silva, WLP; Santoro, A; Sznajder, A; Manganote, EJT; Pereira, AV; Ahuja, S; Bernardes, CA; Santos, AD; Dogra, S; Tomei, TRFP; Gregores, EM; Mercadante, PG; Moon, CS; Novaes, SF; Padula, SS; Abad, DR; Vargas, JCR; Aleksandrov, A; Hadjiiska, R; Iaydjiev, P; Rodozov, M; Stoykova, S; Sultanov, G; Vutova, M; Dimitrov, A; Glushkov, I; Litov, L; Pavlov, B; Petkov, P; Fang, W; Ahmad, M; Bian, JG; Chen, GM; Chen, HS; Chen, M; Cheng, T; Du, R; Jiang, CH; Leggat, D; Plestina, R; Romeo, F; Shaheen, SM; Spiezia, A; Tao, J; Wang, C;

doi: 10.18154/rwth-2016-08728

handle: 10067/1342170151162165141 , 11449/165169 , 11577/3204719 , 11573/897547 , 11589/76883 , 11391/1392426 , 11511/68711 , 2158/1065284 , 11586/169774 , 11579/80451 , 11563/121740 , 2097/35215

Measurement of the top quark mass using charged particles in pp collisions at $\sqrt s =$ 8 TeV

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Abstract

A novel technique for measuring the mass of the top quark that uses only the kinematic properties of its charged decay products is presented. Top quark pair events with final states with one or two charged leptons and hadronic jets are selected from the data set of 8 TeV proton-proton collisions, corresponding to an integrated luminosity of 19.7 fb(-1). By reconstructing secondary vertices inside the selected jets and computing the invariant mass of the system formed by the secondary vertex and an isolated lepton, an observable is constructed that is sensitive to the top quark mass that is expected to be robust against the energy scale of hadronic jets. The main theoretical systematic uncertainties, concerning the modeling of the fragmentation and hadronization of b quarks and the reconstruction of secondary vertices from the decays of b hadrons, are studied. A top quark mass of 173.68 +/- 0.20(stat)(-0.97)(+1.58) (syst) GeV is measured. The overall systematic uncertainty is dominated by the uncertainty in the b quark fragmentation and the modeling of kinematic properties of the top quark.

Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)

Institut National de Physique Nucleaire et de Physique des Particules / CNRS, France

Commissariat a l'Energie Atomique et aux Energies Alternatives / CEA, France

Institute for the Promotion of Teaching Science and Technology of Thailand

Ministry of Education, Science and Technological Development of Serbia

Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)

Secretaria de Estado de Investigacion, Desarrollo e Innovacion, Spain

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Ministry of Education, Youth and Sports (MEYS) of the Czech Republic

Countries

United Kingdom, United Kingdom, United States, Italy, Brazil, Greece, Italy, Belgium, Italy, Italy, Germany, Turkey, Italy, Italy, Italy, Italy

Related Organizations

Deutsches Elektronen-Synchrotron DESY
Germany
Sapienza University of Rome
Italy
Sao Paulo State University
Brazil
Queen Mary University of London
United Kingdom
Universidade Estadual Paulista - UNESP
Brazil

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Keywords

bottom: fragmentation, charged particle: hadroproduction, Nuclear and High Energy Physics, p p: scattering, Physics and Astronomy (miscellaneous), top: mass: measured, Astronomy & Astrophysics, 530, High Energy Physics - Experiment, FRAGMENTATION FUNCTION; DECAYS; MODEL, mass spectrum, info:eu-repo/classification/ddc/530, top quark, 8000 GeV-cms, CMS, Charged particles, final state: ((n)jet dilepton), FISICA DELLE PARTICELLE, Physics, Fragmentation Function, bottom: hadronization, jet: hadronic, 001, kinematics, vertex: secondary, Decays, top: pair production, pp collisions, p p: colliding beams, Model, Top quark mass, experimental results

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