Measurement of the top quark mass in the tt¯→ dilepton channel from √s = 8 TeV ATLAS data

0471087 - FZÚ 2017 RIV NL eng J - Článek v odborném periodiku
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Havránek, Miroslav - Hejbal, Jiří - Jakoubek, Tomáš - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Vrba, Václav … celkem 2857 autorů
Measurement of the top quark mass in the tt¯→ dilepton channel from √s = 8 TeV ATLAS data.
Physics Letters. B. Roč. 761, Oct (2016), 350-371. ISSN 0370-2693. E-ISSN 1873-2445
Institucionální podpora: RVO:68378271
Klíčová slova: ATLAS * mass spectrum * (lepton bottom) * final state * ((n)jet lepton) * CERN LHC Coll
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.807, rok: 2016

The top quark mass is measured in the tt¯→dilepton channel ( lepton=e,μ ) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s=8 TeV and correspond to an integrated luminosity of about 20.2 fb−1 . Exploiting the template method, and using the distribution of invariant masses of lepton– b-jet pairs, the top quark mass is measured to be mtop=172.99±0.41 (stat)±0.74 (syst) GeV , with a total uncertainty of 0.84 GeV . Finally, a combination with previous ATLAS mtop measurements from s=7 TeV data in the tt¯→dilepton and tt¯→lepton+jets channels results in mtop=172.84±0.34 (stat)±0.61 (syst) GeV , with a total uncertainty of 0.70 GeV


Trvalý link: http://hdl.handle.net/11104/0268542