Top-quark mass measurements at LHC: a new approach

5th International Workshop on Top Quark Physics

Alioli, S.^1 ; Fernández, P.^2 ; Fuster, J.^2 ; Irles, A.^2 ; Moch, S.^3,4 ; Uwer, P.^5 ; Vos, M.^2

LBNL and UC Berkeley, 1 Cyclotron Road, Berkeley, CA 94720, United States^1

IFIC, Universitat de València, CSIC, Catedrático Jose Beltrán 2, E-46980 Paterna, Spain^2

II. Inst. für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany^3

DESY, Platanenallee 6, D-15738 Zeuthen, Germany^4

Humboldt-Universität zu Berlin, Newtonstrasse 15, D-12489 Berlin, Germany^5

关键词: Experimental uncertainty;    Gluon radiation;    Hadron collisions;    Invariant mass;    Jet productions;    Mass parameter;    New approaches;    Renormalization;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/452/1/012050/pdf
DOI  :  10.1088/1742-6596/452/1/012050

来源: IOP

【 摘 要 】

We present a new method to measure the top-quark mass in high energetic hadron collisions at the LHC. We study the mass dependence of the production of top-quark pairs in association with an additional jet. The cross section of tt+1Jet production is sensitive to the top-quark mass since gluon radiation depends on the top-quark mass through threshold and cone effects. In particular we study the normalised tt +1Jet cross section differential in the invariant mass of the final state jets. We have investigated the sensitivity of the method together with the impact of various theoretical and experimental uncertainties. We find that the method has the potential to be competitive with existing methods. We emphasize that in the proposed method the mass parameter can be uniquely defined through one-loop renormalization.