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Title
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Neutral current forward-backward asymmetry: from theta(W) to PDF determinations
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Author
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Abstract
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| Measurements of the forward-backward asymmetry in neutral-current Drell-Yan di-lepton production have primarily been used for determinations of the weak mixing angle theta(W). We observe that, unlike the case of Run-I of the Large Hadron Collider (LHC Run-I), for the first time at the LHC Run-II the reconstructed forward-backward asymmetry has the capability of placing useful constraints on the determination of the parton distribution functions (PDFs). By examining the statistical and the PDF uncertainties on the reconstructed forward-backward asymmetry, we investigate its potential for disentangling the flavour content of quark and antiquark PDFs. Access to the valence/sea u-quark and to the sea up-type antiquark PDFs, in particular, may be gained by the appropriate use of selection cuts in the rapidity of the emerging lepton pair in regions both near the Z-boson peak and away from it, in a manner complementary, though more indirect, to the case of the charged-current asymmetry. We study the extension of these results for the planned high-luminosity (HL) LHC. |
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Language
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English
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Source (journal)
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European physical journal : C : particles and fields. - Berlin
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Publication
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Berlin
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2018
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ISSN
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1434-6044
1434-6052
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DOI
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10.1140/EPJC/S10052-018-6120-6
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Volume/pages
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78
:8
(2018)
, 9 p.
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Article Reference
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663
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ISI
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000441931800001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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