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#### Measurement of forward top pair production in the dilepton channel in pp collisions at √s = 13 TeV

##### MPS-Authors
/persons/resource/persons37740

Popov,  D.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31206

Zavertiaev,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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1803.05188.pdf
(Preprint), 533KB

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##### Citation

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2018). Measurement of forward top pair production in the dilepton channel in pp collisions at √s = 13 TeV. Journal of high energy physics: JHEP, 2018: 174. doi:10.1007/JHEP08(2018)174.

Cite as: https://hdl.handle.net/21.11116/0000-0005-7A0B-7
##### Abstract
Forward top quark pair production is studied in $pp$ collisions in the $\mu eb$ final state using a data sample corresponding to an integrated luminosity
of 1.93 fb$^{-1}$ collected with the LHCb experiment at a centre-of-mass energy
of 13 TeV. The cross-section is measured in a fiducial region where both
leptons have a transverse momentum greater than 20 GeV and a pseudorapidity
between 2.0 and 4.5. The quadrature sum of the azimuthal separation and the
difference in pseudorapidities, denoted $\Delta R$, between the two leptons
must be larger than 0.1. The $b$-jet axis is required to be separated from both
leptons by a $\Delta R$ of 0.5, and to have a transverse momentum in excess of
20 GeV and a pseudorapidity between 2.2 and 4.2. The cross-section is measured
to be $$\sigma_{t\bar{t}}= 126\pm19\,(\mathrm{stat})\pm16\,(\mathrm{syst})\pm5\,(\mathrm{lumi})\,\,\mathrm{ fb}$$ where the first uncertainty is statistical, the second is systematic, and
the third is due to the luminosity determination. The measurement is compatible
with the Standard Model prediction.