${{\mathit t}}{{\overline{\mathit t}}}$ Charge Asymmetry (A$_{C}$) in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV

INSPIRE   PDGID:
Q007AC8
VALUE (%) DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$0.55$ $\pm0.23$ $\pm0.25$ 1
AABOUD
2018AM
 LHC ATLAS+CMS combination (lepton + jets)
$2.1$ $\pm1.6$ 2
AAD
2016AE
 ATLS ${{\mathit \ell}}{{\mathit \ell}}$ +$\not E_T$ +${}\geq{}2{{\mathit j}}$
$0.9$ $\pm0.5$ 3
AAD
2016AZ
 ATLS ${{\mathit \ell}}$ +$\not E_T$ +${}\geq{}$4j
$4.2$ $\pm3.2$ 4
AAD
2016T
 ATLS ${\mathit m}_{\mathrm { {{\mathit t}} {{\overline{\mathit t}}} }}>$0.75 TeV, $\vert \vert $y$_{t}\vert −\vert $y$_{{{\overline{\mathit t}}}}$ $\vert \vert <$2, ${{\mathit \ell}}$ + $\not E_T$ + jets
$1.1$ $\pm1.1$ $\pm0.7$ 5
KHACHATRYAN
2016AD
 CMS ${{\mathit \ell}}{{\mathit \ell}}$ +$\not E_T$ +${}\geq{}$2j (${}\geq{}$1b)
$0.33$ $\pm0.26$ $\pm0.33$ 6
KHACHATRYAN
2016AH
 CMS ${{\mathit \ell}}$ +$\not E_T$ +${}\geq{}$4j (${}\geq{}$1b)
$0.10$ $\pm0.68$ $\pm0.37$ 7
KHACHATRYAN
2016T
 CMS ${{\mathit \ell}}$ +$\not E_T$ +${}\geq{}$4j (${}\geq{}$1b)
1  ATLAS and CMS combination based on the data of AAD 2016AZ and KHACHATRYAN 2016AH. It takes into account the correlations of the measurements and systematic errors. A combination of the differential measurements of the charge asymmetry is also presented. The results are in agreement with the SM prediction (NNLO QCD + NLO EW).
2  AAD 2016AE is based on 20.3 fb${}^{-1}$ of data. After kinematic reconstruction, the top quark momenta are corrected for detector resolution and acceptance effects by unfolding, using parton level information of the MC generators. The lepton charge asymmetry is measured as A${}^{ {{\mathit \ell}} {{\mathit \ell}} }_{C}$ = $0.008$ $\pm0.006$. All the measurements are consistent with the SM predictions.
3  AAD 2016AZ based on 20.3 fb${}^{-1}$ of data. All the differential and inclusive measurements are statistically limited and consistent with the SM predictions.
4  AAD 2016T based on 20.3 fb${}^{-1}$ of data. Uses reconstruction techniques for the decay topology of highly boosted top quarks. The observed asymmetry is transformed by unfolding to a parton-level result in the shown fiducial region. The result is consistent with the NLO SM prediction.
5  KHACHATRYAN 2016AD based on 19.5 fb${}^{-1}$ of data. The lepton charge asymmetry is measured as A${}^{ {{\mathit \ell}} {{\mathit \ell}} }_{C}$ = $0.003$ $\pm0.006$ $\pm0.003$. All the measurements are consistent with the SM predictions.
6  KHACHATRYAN 2016AH based on 19.6 fb${}^{-1}$ of data. The same data set as in KHACHATRYAN 2016T is used. A template technique is used, which is sensitive to the charge anti-symmetric component of the ${{\mathit t}}{{\overline{\mathit t}}}$ rapidity distributions and statistically advantageous. The result is consistent with the SM predictions.
7  KHACHATRYAN 2016T based on 19.7 fb${}^{-1}$ of data. The same data set as in KHACHATRYAN 2016AH is used. After kinematic reconstruction the top quark momenta are corrected for detector resolution and acceptance effects by unfolding, using parton level information of the MC generators. All the measurements are consistent with the SM predictions.
References:
AABOUD 2018AM
JHEP 1804 033 Combination of inclusive and differential $ \mathrm{t}\overline{\mathrm{t}} $ charge asymmetry measurements using ATLAS and CMS data at $ \sqrt{s}=7 $ and 8 TeV
AAD 2016T
PL B756 52 Measurement of the Charge Asymmetry in Highly Boosted Top-Quark Pair Production in $\sqrt {s }$ = 8 TeV ${{\mathit p}}{{\mathit p}}$ Collision Data Collected by the ATLAS Experiment
AAD 2016AZ
EPJ C76 87 Measurement of the Charge Asymmetry in Top-Quark Pair Production in the Lepton-Plus-Jets Final State in ${{\mathit p}}{{\mathit p}}$ Collision Data at $\sqrt {s }$ = 8 TeV with the ATLAS Detector
AAD 2016AE
PR D94 032006 Measurements of the Charge Asymmetry in Top-Quark Pair Production in the Dilepton Final State at $\sqrt {s }$ = 8 TeV with the ATLAS Detector
KHACHATRYAN 2016AD
PL B760 365 Measurements of ${\mathit {\mathit t}}{\mathit {\overline{\mathit t}}}$ Charge Asymmetry using Dilepton Final States in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV
KHACHATRYAN 2016AH
PR D93 034014 Measurement of the Charge Asymmetry in top Quark Pair Production in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV using a Template Method
KHACHATRYAN 2016T
PL B757 154 Inclusive and Differential Measurements of the ${\mathit {\mathit t}}{\mathit {\overline{\mathit t}}}$ Charge Asymmetry in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV