The asymmetry of antimatter in the proton

Dove, J.; Kerns, Bryan; McClellan, Randall Evan; Miyasaka, S.; Morton, Daniel; Nagai, K.; Prasad, Sidharth Kumar; Sanftl, F.; Scott, M. B. C.; Tadepalli, A. S.; Aidala, C.; Arrington, J.; Ayuso, C.; Barker, C. L.; Brown, C. N.; Chang, W. C.; Chen, A.; Christian, D. C.; Dannowitz, B. P.; Daugherity, M.; Diefenthaler, M.; Fassi, L. El; Geesaman, D. F.; Gilman, R.; Goto, Y.; Guo, Linghua; Guo, R. S.; Hague, T.; Holt, R. J.; Isenhower, D.; Kinney, E.; Kitts, Noah; Klein, A.; Kleinjan, D.; Kudo, Yuta; Leung, Chi Hung; Lin, P.-J.; Liu, K.; Liu, M. X.; Lorenzon, W.; Makins, N.; Medeiros, M. M.; McGaughey, P. L.; Miyachi, Y.; Mooney, I.; Nakahara, K.; Nakano, K.; Nara, S.; Peng, J. C.; Puckett, A. J. R.; Ramson, B.; Reimer, P.; Rubin, J.; Sawada, S.; Sawada, T.; Shibata, T. A.; Su, D.; Teo, Mae; Tice, B. G.; Towell, R. S.; Uemura, Sho; Watson, Scott A.; Wang, S. G.; Wickes, A. B.; Wu, Jinfei; Xi, Z.; Ye, Z.

doi:10.1038/s41586-021-03282-z

Cited by 88 publications

(68 citation statements)

References 35 publications

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“…The ATLASepWZVjet20 PDF set is consistent with these global PDF sets up to x ∼ 0.1, but deviates from them for x > 0.1, where the W + jets and Z + jets data are most sensitive and demonstrate a preference for a higher xd distribution as discussed in section 4.1. A new result from the SeaQuest/E906 collaboration has recently become available [51], which may also be in tension with the E866 data. Whereas the R s distribution of the CT18A…”

Section: Comparison With Global Pdfsmentioning

confidence: 96%

Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets

Aad

Abbott²,

Abbott³

et al. 2021

J. High Energ. Phys.

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This article presents a new set of proton parton distribution functions, ATLASepWZVjet20, produced in an analysis at next-to-next-to-leading order in QCD. The new data sets considered are the measurements of W+ and W− boson and Z boson production in association with jets in pp collisions at $$ \sqrt{s} $$ s = 8 TeV performed by the ATLAS experiment at the LHC with integrated luminosities of 20.2 fb−1 and 19.9 fb−1, respectively. The analysis also considers the ATLAS measurements of differential W± and Z boson production at $$ \sqrt{s} $$ s = 7 TeV with an integrated luminosity of 4.6 fb−1 and deep-inelastic-scattering data from e±p collisions at the HERA accelerator. An improved determination of the sea-quark densities at high Bjorken x is shown, while confirming a strange-quark density similar in size to the up- and down-sea-quark densities in the range x ≲ 0.02 found by previous ATLAS analyses.

show abstract

Section: Comparison With Global Pdfsmentioning

confidence: 96%

Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets

Aad

Abbott²,

Abbott³

et al. 2021

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[3]; improvements will also extend to the gluon content and flavor structure of the light-quark sea of importance to Intensity Frontier work in the EW sector. In this respect, the EIC will be a valuable follow-up to fixed-target Drell-Yan measurements like the recent FNAL SeaQuest (E906) experiment [10]. At this meeting, we presented some preliminary PDF analysis results, discussed in greater detail in Ref.…”

Section: Tomography Implications Of the Eic For Hepmentioning

confidence: 97%

DIS physics at the EIC and LHeC and connections to the future LHC and $ν$A programs

Hobbs

2022

Preprint

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Deeply-inelastic scattering (DIS) stands to enter a golden age with the prospect of precision programs at the Electron-Ion Collider (EIC) and Large Hadron-electron Collider (LHeC). While these programs will be of considerable importance to resolving longstanding issues in (non)perturbative QCD as well as hadronic and nuclear structure, they will also have valuable implications for a wider range of physics at the Energy and Intensity Frontiers, including at the High-Luminosity LHC (HL-LHC) and future νA facilities. In this plenary contribution, we highlight a number of salient examples of the potential HEP impact from the complementary EIC and LHeC programs drawn from their respective Yellow Report and Whitepaper. Interested readers are encouraged to consult the extensive studies and literature from which these examples are taken for more detail. Contents

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“…New data released this year will afford us a fresh look into this issue. Recent measurements by the SeaQuest collaboration [5] provide new insight into the light antiquark distributions by extending the large x coverage of earlier experiments. At the same time new data on W boson production in p + p collisions by the STAR collaboration [6] offer an alternative way to probe the light antiquark sea in the proton at x ≈ 0.2.…”

Section: Introductionmentioning

confidence: 97%

CJ15 global PDF analysis with new electroweak data from the STAR and SeaQuest experiments

Park,

Accardi,

Jing

et al. 2021

Preprint

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We present updates to a recent CTEQ-Jefferson Lab (CJ) global analysis of parton distribution functions with a new set of electroweak data that provide unique access to quark flavor separation in the proton. In particular, recent W and Z boson measurements from the STAR experiment at RHIC put additional constraints on light quarks and antiquarks near the valence regime. The new measurement of the Drell-Yan lepton pair production ratio in p + p and p + d collisions by the SeaQuest experiment at Fermilab extends the large-x coverage of the previous E866 experiment and sheds new light on the light antiquarks distribution. In this report, the impact of these new data sets on parton distribution functions will be presented with emphasis given to the flavor asymmetry of the light antiquark sea at large values of the parton momentum x .

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The asymmetry of antimatter in the proton

Cited by 88 publications

References 35 publications

Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets

Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets

DIS physics at the EIC and LHeC and connections to the future LHC and $ν$A programs

CJ15 global PDF analysis with new electroweak data from the STAR and SeaQuest experiments

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