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Constraining parton distribution functions from neutral current Drell-Yan measurements

Constraining parton distribution functions from neutral current Drell-Yan measurements
Constraining parton distribution functions from neutral current Drell-Yan measurements

We study the cross section σ and forward-backward asymmetry (AFB) in the process pp→γ∗,Z→+- (with =e, μ) for determinations of parton distribution functions (PDFs) of the proton. We show that, once mapped in the invariant mass of the dilepton final state, M(), both observables, σ and AFB, display a statistical error which is presently competitive with that assigned to the existing PDF sets and which will rapidly become smaller than the latter as the luminosity being accumulated at Run-II of the LHC grows. This statement is applicable to both on-peak and off-peak M() regions, both (just) below and above it, thereby offering a means of constraining the quark PDFs over a sizable (x,Q2) range.

2470-0010
Accomando, E.
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
Fiaschi, J.
a417f04d-05ec-4bff-bdee-ba20ac560fa7
Hautmann, F.
226fd98a-070e-478e-a02e-42a918dca6c0
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Accomando, E.
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
Fiaschi, J.
a417f04d-05ec-4bff-bdee-ba20ac560fa7
Hautmann, F.
226fd98a-070e-478e-a02e-42a918dca6c0
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614

Accomando, E., Fiaschi, J., Hautmann, F. and Moretti, S. (2018) Constraining parton distribution functions from neutral current Drell-Yan measurements. Physical Review D, 98 (1). (doi:10.1103/PhysRevD.98.013003).

Record type: Article

Abstract

We study the cross section σ and forward-backward asymmetry (AFB) in the process pp→γ∗,Z→+- (with =e, μ) for determinations of parton distribution functions (PDFs) of the proton. We show that, once mapped in the invariant mass of the dilepton final state, M(), both observables, σ and AFB, display a statistical error which is presently competitive with that assigned to the existing PDF sets and which will rapidly become smaller than the latter as the luminosity being accumulated at Run-II of the LHC grows. This statement is applicable to both on-peak and off-peak M() regions, both (just) below and above it, thereby offering a means of constraining the quark PDFs over a sizable (x,Q2) range.

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e-pub ahead of print date: 13 July 2018
Published date: July 2018

Identifiers

Local EPrints ID: 424721
URI: https://eprints.soton.ac.uk/id/eprint/424721
ISSN: 2470-0010
PURE UUID: bfc92b70-ee5b-4393-9e92-0d90946e5951

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Date deposited: 05 Oct 2018 11:41
Last modified: 13 Mar 2019 18:09

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Contributors

Author: E. Accomando
Author: J. Fiaschi
Author: F. Hautmann
Author: S. Moretti

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