Using Drell-Yan forward-backward asymmetry to constrain Parton Distribution Functions

29 Apr 2015, 14:50
25m
FORUM ()

FORUM

WG1 Structure Functions and Parton Densities WG1 Structure Functions and Parton Densities

Speaker

Prof. Arie Bodek (University of Rochester (US))

Description

We show that measurements of the forward-backward charge asymmetry ($A_{FB}(M)$) of Drell-Yan dilepton events produced at hadron colliders can be used to constrain Parton Distribution Functions (PDFs). PDF uncertainties are the dominant systematic error in the extraction of of electroweak parameters from hadron collider data. These parameters include the electroweak mixing angles ($\sin^2\theta_{eff}^{lept} (M_Z)$, and $\sin^2\theta_{W}$) and the mass of the W boson. The $\chi^2$ values for fits using different NNPDFs in the extraction of $\sin^2\theta_{eff}^{lept}(M_Z)$ and $\sin^2\theta_W$ from $A_{FB}(M)$ measurements can be used to place additional constraints on PDFs. In turn, using these constrained PDFs significantly reduces the PDF errors in the extraction of electroweak parameters.

Primary author

Prof. Arie Bodek (University of Rochester (US))

Co-authors

Aleko Khukhunaishvili (University of Rochester (US)) Jiyeon Han (University of Rochester (US)) Willis Sakumoto (University of Rochester (US))

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