TY  - JOUR
AU  - ATLAS Collaboration (Aad, G. et al
AU  - Alvarez Piqueras, D.
AU  - Barranco Navarro, L.
AU  - Cabrera Urban, S.
AU  - Castillo Gimenez, V.
AU  - Cerda Alberich, L.
AU  - Costa, M. J.
AU  - Fernandez Martinez, P.
AU  - Ferrer, A.
AU  - Fiorini, L.
AU  - Fuster, J.
AU  - Garcia, C.
AU  - Garcia Navarro, J. E.
AU  - Gonzalez de la Hoz, S.
AU  - Hernandez Jimenez, Y.
AU  - Higon-Rodriguez, E.
AU  - Irles Quiles, A.
AU  - Jimenez Pena, J.
AU  - Kaci, M.
AU  - King, M.
AU  - Lacasta, C.
AU  - Lacuesta, V. R.
AU  - Marti-Garcia, S.
AU  - Mitsou, V. A.
AU  - Pedraza Lopez, S.
AU  - Rodriguez Rodriguez, D.
AU  - Romero Adam, E.
AU  - Ros, E.
AU  - Salt, J.
AU  - Sanchez Martinez, V.
AU  - Soldevila, U.
AU  - Sanchez, J.
AU  - Valero, A.
AU  - Valls Ferrer, J. A.
AU  - Vos, M.
PY  - 2016
DA  - 2016//
TI  - Measurement of the charge asymmetry in highly boosted top-quark pair production in root s=8 TeV pp collision data collected by the ATLAS experiment
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 52
EP  - 71
VL  - 756
PB  - Elsevier Science Bv
AB  - In the pp -> t (t) over bar process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb(-1) of pp collision data at root s=8 TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair (m(t (t) over bar) > 0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within -2 vertical bar y(t)vertical bar – vertical bar y(<(t) over bar)vertical bar < 2is measured to be 4.2 +/- 3.2%, in agreement with the Standard Model prediction at next-to-leading order. A differential measurement in three <(t)over bar> mass bins is also presented.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1512.06092
UR  - https://doi.org/10.1016/j.physletb.2016.02.055
DO  - 10.1016/j.physletb.2016.02.055
LA  - English
N1  - WOS:000373569200008
ID  - ATLASCollaborationAad_etal2016
ER  -