The tt¯ charge asymmetry is measured in events containing a charged lepton (electron or muon) and at least four jets, one of which is identified as originating from b-quark hadronization. The analyzed dataset corresponds to an integrated luminosity of 5.0 fb−1 collected with the CMS detector at the LHC. An inclusive and three differential measurements of the tt¯ charge asymmetry as a function of rapidity, transverse momentum, and invariant mass of the tt¯ system are presented. The measured inclusive tt¯ charge asymmetry is AC=0.004±0.010(stat.)±0.011(syst.) . This result and the three differential measurements are consistent with zero asymmetry as well as with the predictions of the standard model.

Inclusive and differential measurements of the t(t)over-bar charge asymmetry in proton-proton collisions √s=7 TeV

Bianchini L.;MESSINEO, ALBERTO MARIA;RIZZI, ANDREA;TONELLI, GUIDO EMILIO;Marini A. C.;
2012-01-01

Abstract

The tt¯ charge asymmetry is measured in events containing a charged lepton (electron or muon) and at least four jets, one of which is identified as originating from b-quark hadronization. The analyzed dataset corresponds to an integrated luminosity of 5.0 fb−1 collected with the CMS detector at the LHC. An inclusive and three differential measurements of the tt¯ charge asymmetry as a function of rapidity, transverse momentum, and invariant mass of the tt¯ system are presented. The measured inclusive tt¯ charge asymmetry is AC=0.004±0.010(stat.)±0.011(syst.) . This result and the three differential measurements are consistent with zero asymmetry as well as with the predictions of the standard model.
2012
Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Aguilo, E.; Bergauer, T.; Dragicevic, M.; Eroe, J.; Fabjan, C.; Friedl, M.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/152394
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