arXiv : PDF Profiling Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production

Accomando, Elena; Novikov, Ivan; Moretti, Stefano; Zenaiev, Oleksandr; Glazov, Alexander; Luszczak, Agnieszka; Giuli, Francesco; Olness, Fred; Hautmann, Francesco; Abdolmaleki, Hamen; Fiaschi, Juri; Bertone, Valerio

doi:10.1007/JHEP10(2019)176

Article
Report number	arXiv:1907.07727 ; DESY-19-127 ; MS-TP-19-19 ; CERN-TH-2019-110
Title	PDF Profiling Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production
Author(s)	Accomando, Elena (Southampton U. ; Rutherford) ; Fiaschi, Juri (Munster U., ITP ; Southampton U. ; Rutherford) ; Hautmann, Francesco (Rutherford ; Antwerp U. ; Oxford U., Theor. Phys. ; U. Basque Country, Leioa ; CERN) ; Moretti, Stefano (Southampton U. ; Rutherford) ; Bertone, Valerio (Pavia U.) ; Giuli, Francesco (Rome U., Tor Vergata ; INFN, Rome2) ; Abdolmaleki, Hamen (Semnan U.) ; Luszczak, Agnieszka (Cracow Tech. U.) ; Glazov, Alexander (DESY) ; Olness, Fred (Southern Methodist U.) ; Novikov, Ivan (Dubna, JINR) ; Zenaiev, Oleksandr (Hamburg U., Inst. Theor. Phys. II)
Collaboration	xFitter Developers' team
Publication	2019-10-15
Imprint	2019-07-17
Number of pages	21
Note	All the authors, but Elena Accomando, Juri Fiaschi, Francesco Hautmann, and Stefano Moretti, are members of the xFitter Developer's Team. 19 pages, 10 figures
In:	JHEP 1910 (2019) 176
DOI	10.1007/JHEP10(2019)176
Subject category	hep-ph ; Particle Physics - Phenomenology
Abstract	Non-perturbative QCD effects from Parton Distribution Functions (PDFs) may be constrained by using high-statistics Large Hadron Collider (LHC) data. Drell-Yan (DY) measurements in the Charged Current (CC) case provide one of the primary means to do this, in the form of the lepton charge asymmetry. We investigate here the impact of measurements in Neutral Current (NC) DY data mapped onto the Forward-Backward Asymmetry ($A_{\rm FB}$) on PDF determinations, by using the open source fit platform {\tt{xFitter}}. We demonstrate the potential impact of $A_{\rm FB}$ data on PDF determinations and perform a thorough analysis of related uncertainties.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2019-2024 Authors (License: CC-BY-4.0)

$Original (red) and profiled (blue) distributions for the normalised distribution of the ratios of (top row, left to right) $u$-valence, $d$-valence and $((2/3)u+(1/3)d)$-valence and (bottom row, left to right) $u$-sea, $d$-sea quarks and $(u+d)$-sea quarks of the HERAPDF2.0nnlo PDF set obtained using $A_{\rm{FB}}^*$ pseudodata corresponding to an integrated luminosity of 3000 fb$^{-1}$, applying a rapidity cut of $|y_{\ell\ell}| > 4.0$. The acceptance region of the detector has been enlarged up to $|\eta_\ell| < 5$, and the profiling is performed through the LO code.$ $Original (red) and profiled (blue) distributions for the normalised distribution of the ratios of (top row, left to right) $u$-valence, $d$-valence and $((2/3)u+(1/3)d)$-valence and (bottom row, left to right) $u$-sea, $d$-sea quarks and $(u+d)$-sea quarks of the HERAPDF2.0nnlo PDF set obtained using $A_{\rm{FB}}^*$ pseudodata corresponding to an integrated luminosity of 3000 fb$^{-1}$, applying a rapidity cut of $|y_{\ell\ell}| > 4.0$. The acceptance region of the detector has been enlarged up to $|\eta_\ell| < 5$, and the profiling is performed through the LO code.$ $Original (red) and profiled (blue) distributions for the normalised distribution of the ratios of (left to right) $u$-valence, $d$-valence, $u$-sea and $d$-sea quarks. The profiled curves are obtained using $A_{\rm{FB}}^*$ pseudodata corresponding to an integrated luminosity of 300 fb$^{-1}$. Distributions are shown for the PDF sets (rows top to bottom) NNPDF3.1nnlo, MMHT2014nnlo, ABMP16nnlo and HERAPDF2.0nnlo.$ Show more plots

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Record created 2019-07-20, last modified 2021-11-12

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