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

Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Caminada, L.; Deiters, K.; Erdmann, W.; Horisberger, R.; Ingram, Q.; Kaestli, H.C.; Kotlinski, D.; Langenegger, U.; Rohe, T.; Wiederkehr, S.A.; Woods, N.

doi:10.1140/epjc/s10052-019-6788-2

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

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Dragicevic M, Erö J, Escalante Del Valle A, Caminada L, Deiters K, Erdmann W, Horisberger R, Ingram Q, Kaestli HC, Kotlinski D, Langenegger U, Rohe T, Wiederkehr SA, Woods N, et al.

Citation

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., … Woods, N. (2019). Measurement of the top quark mass in the all-jets final state at √s = 13 TeV and combination with the lepton+jets channel. European Physical Journal C: Particles and Fields, 79(4), 313 (27 pp.). https://doi.org/10.1140/epjc/s10052-019-6788-2

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:27942

A top quark mass measurement is performed using 35.9fb^-1 of LHC proton-proton collision data collected with the CMS detector at √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 the multijet background. Using the ideogram method, the top quark mass (m_t) is determined, simultaneously constraining an additional jet energy scale factor (JSF). The resulting value of m_t = 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 m_t measurement of 172.26 ± 0.07 (stat+JSF) ± 0.61 (syst) GeV. This is the first combined m_t extraction from the lepton+jets and all-jets channels through a single likelihood function.