We present a measurement of the Z boson differential cross section in rapidity and transverse momentum using a data sample of pp collision events at a centre-of-mass energy s=8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The Z boson is identified via its decay to a pair of muons. The measurement provides a precision test of quantum chromodynamics over a large region of phase space. In addition, due to the small experimental uncertainties in the measurement the data has the potential to constrain the gluon parton distribution function in the kinematic regime important for Higgs boson production via gluon fusion. The results agree with the next-to-next-to-leading-order predictions computed with the FEWZ program. The results are also compared to the commonly used leading-order MADGRAPH and next-to-leading-order POWHEG generators.
Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2015). Measurement of the Z boson differential cross section in transverse momentum and rapidity in proton–proton collisions at 8 TeV. PHYSICS LETTERS. SECTION B, 749, 187-209 [10.1016/j.physletb.2015.07.065].
Measurement of the Z boson differential cross section in transverse momentum and rapidity in proton–proton collisions at 8 TeV
DINARDO, MAURO EMANUELEMembro del Collaboration Group
;FIORENDI, SARAMembro del Collaboration Group
;GEROSA, RAFFAELE ANGELOMembro del Collaboration Group
;GHEZZI, ALESSIOMembro del Collaboration Group
;GOVONI, PIETROMembro del Collaboration Group
;LUCCHINI, MARCO TOLIMANMembro del Collaboration Group
;MANZONI, RICCARDO ANDREAMembro del Collaboration Group
;MARTELLI, ARABELLAMembro del Collaboration Group
;MARZOCCHI, BADDERMembro del Collaboration Group
;MORONI, LUIGIMembro del Collaboration Group
;PAGANONI, MARCOMembro del Collaboration Group
;RAGAZZI, STEFANOMembro del Collaboration Group
;TABARELLI DE FATIS, TOMMASOPenultimo
Membro del Collaboration Group
;Branca, A.;De Guio, F.Membro del Collaboration Group
;
2015
Abstract
We present a measurement of the Z boson differential cross section in rapidity and transverse momentum using a data sample of pp collision events at a centre-of-mass energy s=8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The Z boson is identified via its decay to a pair of muons. The measurement provides a precision test of quantum chromodynamics over a large region of phase space. In addition, due to the small experimental uncertainties in the measurement the data has the potential to constrain the gluon parton distribution function in the kinematic regime important for Higgs boson production via gluon fusion. The results agree with the next-to-next-to-leading-order predictions computed with the FEWZ program. The results are also compared to the commonly used leading-order MADGRAPH and next-to-leading-order POWHEG generators.
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