002875422 001__ 2875422
002875422 005__ 20240410042710.0
002875422 0248_ $$aoai:cds.cern.ch:2875422$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002875422 0247_ $$2DOI$$9APS$$a10.1103/PhysRevD.109.054019$$qpublication
002875422 037__ $$9arXiv$$aarXiv:2309.11269$$chep-ph
002875422 037__ $$9arXiv:reportnumber$$aDESY-23-136
002875422 035__ $$9arXiv$$aoai:arXiv.org:2309.11269
002875422 035__ $$9Inspire$$aoai:inspirehep.net:2700437$$d2024-04-09T13:27:55Z$$h2024-04-10T02:00:06Z$$mmarcxml$$ttrue$$uhttps://inspirehep.net/api/oai2d
002875422 035__ $$9Inspire$$a2700437
002875422 041__ $$aeng
002875422 100__ $$aArmesto, Néstor$$jORCID:0000-0003-0940-0783$$uSantiago de Compostela U., IGFAE$$vDepartamento de Física de Partículas and IGFAE, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
002875422 245__ $$9APS$$aImpact of Inclusive Electron Ion Collider Data on Collinear Parton Distributions
002875422 269__ $$c2023-09-20
002875422 260__ $$c2024-03-01
002875422 300__ $$a12 p
002875422 520__ $$9APS$$aA study is presented of the impact of updated simulated inclusive electron ion collider deep inelastic scattering data on the determination of the proton and nuclear parton distribution functions (PDFs) at next-to-next-to-leading and next-to-leading order in QCD, respectively. The influence on the proton PDFs is evaluated relative to the HERAPDF2.0 set, which uses inclusive HERA data only, and also relative to the global fitting approach of the MSHT20 PDFs. The impact on nuclear PDFs is assessed relative to the EPPS21 global fit and is presented in terms of nuclear modification ratios. For all cases studied, significant improvements in the PDF uncertainties are observed for several parton species. The most striking impact occurs for the nuclear PDFs in general and for the region of high Bjorken <math display="inline"><mi>x</mi></math> in the proton PDFs, particularly for the valence quark distributions.
002875422 520__ $$9arXiv$$aA study is presented of the impact of simulated inclusive Electron Ion Collider Deep Inelastic Scattering data on the determination of the proton and nuclear parton distribution functions (PDFs) at next-to-next-to-leading and next-to-leading order in QCD, respectively. The influence on the proton PDFs is evaluated relative to the HERAPDF2.0 set, which uses inclusive HERA data only, and also relative to the global fitting approach of the MSHT20 PDFs. The impact on nuclear PDFs is assessed relative to the EPPS21 global fit and is presented in terms of nuclear modification ratios. For all cases studied, significant improvements in the PDF uncertainties are observed for several parton species. The most striking impact occurs for the nuclear PDFs in general and for the region of high Bjorken $x$ in the proton PDFs, particularly for the valence quark distributions.
002875422 540__ $$3preprint$$aCC BY 4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002875422 540__ $$3publication$$aCC BY 4.0$$fSCOAP3$$uhttps://creativecommons.org/licenses/by/4.0/
002875422 542__ $$3publication$$dauthors$$g2024
002875422 595_D $$aZ$$d2023-09-28$$sabs
002875422 595_D $$aZ$$d2023-10-03$$sprinted
002875422 65017 $$2arXiv$$ahep-ph
002875422 65017 $$2SzGeCERN$$aParticle Physics - Phenomenology
002875422 690C_ $$aCERN
002875422 690C_ $$aARTICLE
002875422 700__ $$aCridge, Thomas$$jORCID:0000-0001-9065-8655$$uDESY$$vDeutsches Elektronen-Synchrotron DESY, Germany
002875422 700__ $$aGiuli, Francesco$$jORCID:0000-0002-8506-274X$$uCERN$$vCERN, CH-1211 Geneva, Switzerland
002875422 700__ $$aHarland-Lang, Lucian$$uUniversity Coll. London$$vDepartment of Physics and Astronomy, University College, London, WC1E 6BT, United Kingdom
002875422 700__ $$aNewman, Paul$$jORCID:0000-0002-6252-266X$$uBirmingham U.$$vSchool of Physics and Astronomy, University of Birmingham, B15 2TT, United Kingdom
002875422 700__ $$aSchmookler, Barak$$uUC, Riverside$$vDepartment of Physics and Astronomy, University of California, Riverside, California 92521, USA
002875422 700__ $$aThorne, Robert$$uUniversity Coll. London$$vDepartment of Physics and Astronomy, University College, London, WC1E 6BT, United Kingdom
002875422 700__ $$aWichmann, Katarzyna$$uDESY$$vDeutsches Elektronen-Synchrotron DESY, Germany
002875422 773__ $$c5$$mpublication$$n5$$pPhys. Rev. D$$v109$$xPhys.Rev.D 109 (2024) 5, 054019$$y2024
002875422 8564_ $$82484122$$s20133$$uhttp://cds.cern.ch/record/2875422/files/pdfs_EIC_new21_uvp2.png$$y00011 As for figure~\ref{fig:nglue}, but for the valence up quark density.
002875422 8564_ $$82484123$$s17919$$uhttp://cds.cern.ch/record/2875422/files/uv_q19_err_highxn.png$$y00003 Impact of simulated EIC data on the collinear proton parton distributions relative to the MSHT20 global fits. The bands show relative uncertainties as a function of $x$, comparing the MSHT20 baseline with results when additionally including EIC data. Top: up valence density at $Q^2 = 1.9 \ \mathrm{GeV^2}$, also comparing EIC scenarios with a restriction to $y > 10^{-2}$ (`MSHT20 + EIC') with the standard requirement $y > 10^{-3}$ (`MSHT20 + EIC (high Acc.)'). Bottom: gluon density at $Q^2 = 10^4 \ \mathrm{GeV^2}$.
002875422 8564_ $$82484124$$s3046912$$uhttp://cds.cern.ch/record/2875422/files/2309.11269.pdf$$yFulltext
002875422 8564_ $$82484125$$s37103$$uhttp://cds.cern.ch/record/2875422/files/MSHT_ggF_xsecs_wEIC_plot_N3LOxseconly_PDFandquadonly_errs2.png$$y00008 Impact of simulated EIC data on the Higgs production cross section results via gluon fusion (with $\sqrt{s} = 13~{\rm TeV}$) at the central scale $\mu = m_H/2$. The cross-section is calculated using N$^3$LO matrix elements but only NNLO PDFs. The dotted lines indicate the PDF only uncertainties, the solid lines are the PDF+scale uncertainties combined in quadrature, with the scale uncertainties determined by varying $\mu$ by a factor of 2 following the 9-point prescription.
002875422 8564_ $$82484126$$s83368$$uhttp://cds.cern.ch/record/2875422/files/eic-fig2.png$$y00001 Impact of simulated EIC data on the NNLO collinear parton distributions of the proton. The bands show relative total uncertainties as a function of $x$ for the up-valence, down-valence, gluon and total sea distributions, for $Q^2 = 1.9 \ {\mathrm {GeV^2}}$. The HERAPDF2.0NNLO total uncertainties (using HERA data alone) are compared with results in which simulated EIC data are also included in the HERAPDF2.0NNLO fitting framework.
002875422 8564_ $$82484127$$s209691$$uhttp://cds.cern.ch/record/2875422/files/eic-fig3.png$$y00002 Impact of simulated EIC data on the NNLO collinear parton distributions of the proton shown on a logarithmic $x$ scale for $Q^2 = m^2_{Z} \ {\mathrm {GeV^2}}$. The bands show relative total uncertainties as a function of $x$ for the up-valence, down-valence, gluon and total sea distributions. The HERAPDF2.0NNLO total uncertainties (using HERA data alone) are compared with results in which simulated EIC data are also included in the HERAPDF2.0NNLO fitting framework.
002875422 8564_ $$82484128$$s101880$$uhttp://cds.cern.ch/record/2875422/files/HERAPDFwEIC_ggqglumis.png$$y00005 Impact of simulated EIC data on the LHC collinear PDF luminosities relative to the HERAPDF2.0 PDF fit as a function of the parton-parton invariant mass, $m_X$. Total uncertainties are included. Upper left: gluon-gluon luminosity. Upper right: quark-gluon luminosity. Lower left: quark-antiquark luminosity. Lower right: quark-quark luminosity.
002875422 8564_ $$82484129$$s92889$$uhttp://cds.cern.ch/record/2875422/files/HERAPDFwEIC_qqbqq_lumis.png$$y00006 Impact of simulated EIC data on the LHC collinear PDF luminosities relative to the HERAPDF2.0 PDF fit as a function of the parton-parton invariant mass, $m_X$. Total uncertainties are included. Upper left: gluon-gluon luminosity. Upper right: quark-gluon luminosity. Lower left: quark-antiquark luminosity. Lower right: quark-quark luminosity.
002875422 8564_ $$82484130$$s17655$$uhttp://cds.cern.ch/record/2875422/files/gluon_low_q10000_errn.png$$y00004 Impact of simulated EIC data on the collinear proton parton distributions relative to the MSHT20 global fits. The bands show relative uncertainties as a function of $x$, comparing the MSHT20 baseline with results when additionally including EIC data. Top: up valence density at $Q^2 = 1.9 \ \mathrm{GeV^2}$, also comparing EIC scenarios with a restriction to $y > 10^{-2}$ (`MSHT20 + EIC') with the standard requirement $y > 10^{-3}$ (`MSHT20 + EIC (high Acc.)'). Bottom: gluon density at $Q^2 = 10^4 \ \mathrm{GeV^2}$.
002875422 8564_ $$82484131$$s61532$$uhttp://cds.cern.ch/record/2875422/files/MSHT20NNLO_wEICadded_LumiErrs.png$$y00007 Impact of simulated EIC data on the LHC collinear PDF luminosities relative to the MSHT20 global fits as a function of the parton-parton invariant mass, $m_X$. Upper left: gluon-gluon luminosity. Upper right: quark-gluon luminosity. Lower left: quark-antiquark luminosity. Lower right: quark-quark luminosity.
002875422 8564_ $$82484132$$s54535$$uhttp://cds.cern.ch/record/2875422/files/phase-space2.png$$y00000 The locations in the ($x, Q^2$) plane of the HERA and EIC neutral current inclusive DIS data points included in the analysis. Figure reproduced from~\cite{Cerci:2023uhu}.
002875422 8564_ $$82484133$$s20083$$uhttp://cds.cern.ch/record/2875422/files/pdfs_EIC_new21_gluon2.png$$y00009 Impact of EIC data on the understanding of nuclear effects in the collinear gluon distribution, as obtained from DGLAP-based QCD fits. Top: projected relative uncertainty on the gluon density of the proton as a function of $x$ for $Q^2 = 10 \ {\rm GeV^2}$, using only EIC input data. Middle: projected relative uncertainty on the gluon density of a proton in the gold nucleus as a function of $x$ for $Q^2 = 10 \ {\rm GeV^2}$, using only EIC input data. Bottom: Nuclear modification factors formed from the ratio of projected gluon densities in gold and in the proton. The results obtained using only EIC data are compared with those from a global fit (EPPS21~\cite{Eskola:2021nhw}). Vertical dotted lines indicate the lowest values of $x$ for pseudo-data used in the fit, see the text.
002875422 8564_ $$82484134$$s20118$$uhttp://cds.cern.ch/record/2875422/files/pdfs_EIC_new21_sea2.png$$y00010 As for figure~\ref{fig:nglue}, but for the sea up quark density.
002875422 960__ $$a13
002875422 980__ $$aARTICLE