TY  - SER
AU  - Aad,G.
AU  - Abdallah,J.
AU  - Chelkov,G.A.
AU  - Abbott,B.
ED  - Томский государственный университет
TI  - Determination of the top-quark pole mass using t t¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
KW  - ATLAS, детектор
KW  - Большой адронный коллайдер
KW  - кварки
KW  - столкновение частиц
KW  - статьи в журналах
N1  - Библиогр.: 70 назв
N2  - The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the tt¯+1-jet system. This distribution can be used for a precise determination of the top-quark mass since gluon radiation depends on the mass of the quarks. The experimental analysis is based on proton-proton collision data collected by the ATLAS detector at the LHC with a centre-of-mass energy of 7 TeV corresponding to an integrated luminosity of 4.6 fb−1. The selected events were identified using the lepton+jets top-quark-pair decay channel, where lepton refers to either an electron or a muon. The observed distribution is compared to a theoretical prediction at next-to-leading-order accuracy in quantum chromodynamics using the pole-mass scheme. With this method, the measured value of the top-quark pole mass, mpolet, is: mpolet =173.7 ± 1.5 (stat.) ± 1.4 (syst.) +1.0−0.5 (theory) GeV. This result represents the most precise measurement of the top-quark pole mass to date
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000534118
ER  -