Measurement of the top-quark mass in all-jets tt events in pp collisions at √s = 7 TeV

Authors

S. Chatrchyan, Yerevan Physics Institute, Armenia
CMS Collaboration, CMS CollaborationFollow
Ekaterina Avdeeva, University of Nebraska-LincolnFollow
Kenneth A. Bloom, University of Nebraska - LincolnFollow
S. Bose, University of Nebraska - LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Aaron Dominguez, University of Nebraska-LincolnFollow
M. Eads, University of Nebraska-Lincoln, Lincoln,Follow
Rebeca Gonzalez Suarez, University of Nebraska-LincolnFollow
J. Keller, University of Nebraska-LincolnFollow
Ilya Kravchenko, University of Nebraska-LincolnFollow
Jose Lazo-Flores, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska - LincolnFollow
F. Meier, University of Nebraska-Lincoln, Lincoln,Follow
Gregory Snow, University of Nebraska - LincolnFollow

Date of this Version

2014

Citation

Eur. Phys. J. C (2014) 74:2758 DOI:10.1140/epjc/s10052-014-2758-x

Comments

Publishedby SCOAP3 under Creative Commons license.

Abstract

The mass of the top quark is measured using a sample of tt candidate events with at least six jets in the final state. The sample is selected from data collected with the CMS detector in pp collisions at √s = 7 TeV in 2011 and corresponds to an integrated luminosity of 3.54 fb⁻¹. The mass is reconstructed for each event employing a kinematic fit of the jets to a t¯t hypothesis. The top-quark mass is measured to be 173.49±0.69 (stat.)±1.21 (syst.) GeV. A combination with previously published measurements in other decay modes byCMSyields a mass of 173.54±0.33 (stat.)± 0.96 (syst.) GeV.