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arXiv · 1810.04061

Off-shell initial state effects, gauge invariance and angular distributions in the Drell-Yan process

Maxim Nefedov·Vladimir Saleev
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Abstract

We discuss production of Drell-Yan lepton pairs at hadron colliders in the framework of the parton Reggeization approach, which includes off-shell initial state effects in a gauge-invariant way. Other possible prescriptions to restore gauge-invariance of hard-scattering coefficient with off-shell initial-state partons are also investigated and significant differences for the resulting structure functions are found, especially for the $F_{UU}^{(\cos2ϕ)}$. We compare our numerical results for $q_T$-spectra of the lepton pair with experimental data, obtained by E-288 collaboration ($\sqrt{S}=19.4$ and 23.8 GeV) and find a good agreement. Also we perform predictions for the Drell-Yan structure functions at NICA $pp$-collider ($\sqrt{S}=24$ GeV).

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Maxim Nefedov, Vladimir Saleev. 2018-10-09. Off-shell initial state effects, gauge invariance and angular distributions in the Drell-Yan process. https://doi.org/10.1016/j.physletb.2018.12.071

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