Measurement of the top quark mass in the all-jets final state at √s=13TeV and combination with the lepton+jets channel; European Physical Journal C; Vol. 79, iss. 4

Measurement of the top quark mass in the all-jets final state at √s=13TeV and combination with the lepton+jets channel

Bibliografske podrobnosti
Parent link:European Physical Journal C
Vol. 79, iss. 4.— 2019.— [313, 27 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Научно-производственная лаборатория "Импульсно-пучковых, электроразрядных и плазменных технологий"
Drugi avtorji: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Asilar E. Ece, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich, Okhotnikov V. V. Vitaly Vladimirovich
Izvleček:Title screen
A top quark mass measurement is performed using 35.9fb−135.9fb−1 of LHC proton-proton collision data collected with the CMS detector at s√=13TeVs=13TeV. The measurement uses the tt¯tt¯ all-jets final state. A kinematic fit is performed to reconstruct the decay of the tt¯tt¯ system and suppress the multijet background. Using the ideogram method, the top quark mass (mtmt) is determined, simultaneously constraining an additional jet energy scale factor (JSFJSF). The resulting value of mt=172.34±0.20(stat+JSF)±0.70(syst)GeVmt=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 tt¯tt¯ lepton+jets and all-jets final states is presented, using the same mass extraction method, and provides an mtmt measurement of 172.26±0.07(stat+JSF)±0.61(syst)GeV172.26±0.07(stat+JSF)±0.61(syst)GeV. This is the first combined mtmt extraction from the lepton+jets and all-jets channels through a single likelihood function.
Jezik:angleščina
Izdano: 2019
Teme:
электронный ресурс
труды учёных ТПУ
кварки
протон-протонные соударения
Online dostop:https://doi.org/10.1140/epjc/s10052-019-6788-2
Format: Elektronski Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662637
Opis
Izvleček:Title screen
A top quark mass measurement is performed using 35.9fb−135.9fb−1 of LHC proton-proton collision data collected with the CMS detector at s√=13TeVs=13TeV. The measurement uses the tt¯tt¯ all-jets final state. A kinematic fit is performed to reconstruct the decay of the tt¯tt¯ system and suppress the multijet background. Using the ideogram method, the top quark mass (mtmt) is determined, simultaneously constraining an additional jet energy scale factor (JSFJSF). The resulting value of mt=172.34±0.20(stat+JSF)±0.70(syst)GeVmt=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 tt¯tt¯ lepton+jets and all-jets final states is presented, using the same mass extraction method, and provides an mtmt measurement of 172.26±0.07(stat+JSF)±0.61(syst)GeV172.26±0.07(stat+JSF)±0.61(syst)GeV. This is the first combined mtmt extraction from the lepton+jets and all-jets channels through a single likelihood function.
DOI:10.1140/epjc/s10052-019-6788-2

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