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nPDF constraints from the Large Hadron Electron Collider · Around

2016

nPDF constraints from the Large Hadron Electron Collider

Helenius, Ilkka, Paukkunen, Hannu, Armesto, Nestor

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An updated analysis regarding the expected nuclear PDF constraints from the future Large Hadron Electron Collider (LHeC) experiment is presented.

The new study is based on a more flexible small-$x$ parametrization which provides less biased uncertainty estimates in the region where there are currently no data constraints.
The effect of the LHeC is quantified by directly including a sample of pseudodata according to the expected precision of this planned experiment.
As a result, a significant reduction of the small-$x$ uncertainties in sea quarks and gluons is observed.

Built on

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M. Hirai, S. Kumano and T. H. Nagai, Determination of nuclear parton distribution functions and their uncertainties in next-to-leading order , Phys. Rev. C76
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K. J. Eskola, H. Paukkunen and C. A. Salgado, EPS09: A New Generation of NLO and LO Nuclear Parton Distribution Functions , JHEP 04
Original
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A. Dainese et al., Heavy ions at the Future Circular Collider , arXiv:1605.01389
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M. Klein. Private communication
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Then

K. Kovarik et al., nCTEQ15 - Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework , Phys. Rev. D93
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H. Khanpour and S. Atashbar Tehrani, Global Analysis of Nuclear Parton Distribution Functions and Their Uncertainties at Next-to-Next-to-Leading Order , Phys. Rev. D93
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N. Armesto, H. Paukkunen, J. M. Penín, C. A. Salgado and P. Zurita, An analysis of the impact of LHC Run I proton-lead data on nuclear parton densities , Eur. Phys. J. C76
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