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

Sirunyan, AM (2019) Measurement of the top quark mass in the all- jets final state at root s=13 TeV and combination with the lepton plus jets channel. In: The European Physical Journal C, 79 (4).

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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.

Item Type:	Journal Article
Publication:	The European Physical Journal C
Publisher:	Springer New York LLC
Additional Information:	The copyright for this article belongs to Springer New York LLC
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	29 May 2019 06:42
Last Modified:	29 May 2019 06:42
URI:	http://eprints.iisc.ac.in/id/eprint/62542

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