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Title: | Measurement of the top quark mass in the all-jets final state at √s=13TeV and combination with the lepton+jets channel |
Authors: | CMS Collaboration Sirunyan, A. M. CHAUHAN, S. DUBE, SOURABH HEGDE, V. KAPOOR, A. KOTHEKAR, K. PANDEY, S. RANE, A. RASTOGI, A. SHARMA, SEEMA et al. Dept. of Physics |
Keywords: | Physics 2019 |
Issue Date: | Apr-2019 |
Publisher: | Springer Nature |
Citation: | European Physical Journal C, 79(4). |
Abstract: | A top quark mass measurement is performed using 35.9 fb - 1 of LHC proton- proton collision data collected with the CMS detector at v s = 13 TeV. The measurement uses the tt all- jets final state. A kinematic fit is performed to reconstruct the decay of the tt system and suppress themultijet background. Using the ideogram method, the top quark mass ( mt) is determined, simultaneously constraining an additional jet energy scale factor ( JSF). The resulting value of mt = 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 lepton+ jets and all- jets final states is presented, using the same mass extraction method, and provides an mt measurement of 172.26 +/- 0.07 ( stat+ JSF) +/- 0.61 ( syst) GeV. This is the first combined mt extraction from the lepton+ jets and all- jets channels through a single likelihood function. |
URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4420 https://doi.org/10.1140/epjc/s10052-019-6788-2 |
ISSN: | 1434-6044 1434-6052 |
Appears in Collections: | JOURNAL ARTICLES |
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