Publisher Correction: The asymmetry of antimatter in the proton

Dove, J.; Kerns, B; McClellan, R. E.; Miyasaka, Shouji; Morton, D H; Nagai, K.; Prasad, Shivangi; Sanftl, F.; Scott, Matt; Tadepalli, A. S.; Aidala, C.; Arrington, J.; Ayuso, C.; Barker, C L; Brown, C.; Chang, W. C.; Chen, A; Christian, D. C.; Dannowitz, B P; Daugherity, M.; Diefenthaler, M.; Fassi, L. El; Geesaman, D. F.; Gilman, Robert H.; Goto, Y.; Guo, L.; Guo, R.; Hague, T.; Isenhower, D.; Kinney, E.; Kitts, N; Klein, Andreas; Kleinjan, D.; KUDO, Yoshihiro; Leung, Ching-Him; Lin, P-J; Liu, K.; Liu, M X; Lorenzon, W.; Makins, N.; Medeiros, M Mesquita de; McGaughey, P. L.; Miyachi, Y.; Mooney, I.; Nakahara, K.; Nakano, Kazuo; Nara, S; Peng, J.-C.; Puckett, A. J. R.; Ramson, B.; Reimer, P. E.; Rubin, J.; Sawada, S.; Sawada, T.; Shibata, T. A.; Su, D.; Teo, Mae; Tice, B G; Towell, R. S.; Uemura, Sho; Watson, S.; Wang, SuYin Grass; Wickes, A B; Wu, Jinyuan; Xi, Z; Ye, Z.

doi:10.1038/s41586-022-04707-z

Cited by 15 publications

(7 citation statements)

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“…The present study aims at investigating the relevance of recently released FNAL-E906 (SeaQuest) data on the ratio of DY cross sections for proton-deuteron (𝑝𝑑) and proton-proton (𝑝 𝑝) collisions 𝜎 𝑝𝑑→𝛾 * →𝜇 + 𝜇 − /𝜎 𝑝 𝑝→𝛾 * →𝜇 + 𝜇 − [1,8] as a function of Feynman-𝑥 variable 𝑥 𝐹 for constraining the light-flavour isospin asymmetry ( d − ū) (𝑥), and the related ( d/ ū) (𝑥) ratio, according to an idea already pointed out by Ellis and Stirling in Ref. [9].…”

Section: Introductionmentioning

confidence: 99%

Impact of SeaQuest data on PDF fits at large x

Alekhin,

Garzelli,

Kulagin

et al. 2023

Eur. Phys. J. C

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We evaluate the impact of recent SeaQuest (FNAL-E906 experiment) data on dimuon production in proton-deuteron and proton-proton collisions on parton distribution functions (PDFs). We find these data in a good agreement with the QCD predictions based on PDFs fitted to the Tevatron and LHC data on forward production of W and Z bosons. As a basis for this study we use the ABMP16 PDF fits and show that they turn out to be compatible with the SeaQuest data, and that these data have constraining power, allowing to reduce the uncertainties on the isospin asymmetry of the light-sea-quark distribution at large longitudinal momentum fraction x. We discuss the nuclear corrections needed to describe the deuteron and show that they affect the theoretical description of the proton-deuteron Drell–Yan cross section at the level of $$\mathcal {O}(0.5{-}1)$$ O ( 0.5 - 1 ) %. We also comment on the compatibility of the SeaQuest results with other state-of-the-art PDF fits and show that these data are in clear disagreement with models proposing an SU(3)-flavor symmetric quark sea. Finally, we perform a comparison between the second Mellin moments of the light-quark PDFs and recent results from various lattice QCD computations, which demonstrates good compatibility, albeit limited by the uncertainties inherent in current lattice QCD simulations.

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Section: Introductionmentioning

confidence: 99%

Impact of SeaQuest data on PDF fits at large x

Alekhin,

Garzelli,

Kulagin

et al. 2023

Eur. Phys. J. C

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“…The SeaQuest experiment looks for dimuon signals coming from either the Drell-Yan process or from the decay of the 𝐽/𝜓 or 𝜓 ′ mesons [1,2]. The track pairs we reconstruct from the data not only contain muon pairs from the aforementioned processes but also random combinations of single muons from uncorrelated processes.…”

Section: Introductionmentioning

confidence: 99%

“…1This manuscript does not describe the method used in ref [2]. to estimate the combinatoric background.…”

mentioning

confidence: 99%

Estimation of combinatoric background in seaquest using an event-mixing method

Pate,

Pun,

Hossain

et al. 2023

J. Inst.

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All experiments observing dilepton pairs (e.g. e + e -, μ + μ -) must confront the existence of a combinatoric background caused by the combining of tracks not arising from the same physics vertex. Some method must be devised to calculate and remove this background. In this document we describe a particular event-mixing method relying on many of the unique aspects of the SeaQuest spectrometer and data. The method described here calculates the combinatoric background with correct normalization; i.e., there is no need to assign a floating normalization factor that is then determined in a subsequent fitting procedure. Numerous tests are applied to demonstrate the reliability of the method.

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“…Furthermore, the LHCb measurements constrain strange and charm PDFs at high x, including intrinsic charm [38,39]. Recently, the SeaQuest collaboration [40] reported a measurement of the Drell-Yan process, which is sensitive to d/ū PDF ratio. Tensions between the SeaQuest [40] and NuSea [41] results in the large x region are observed.…”

Section: Jhep07(2022)026 1 Introductionmentioning

confidence: 99%

“…Recently, the SeaQuest collaboration [40] reported a measurement of the Drell-Yan process, which is sensitive to d/ū PDF ratio. Tensions between the SeaQuest [40] and NuSea [41] results in the large x region are observed. Since both results have large contributions from nuclear effects, LHCb measurements using the proton-proton (pp) collision data can provide complementary constraints in that x region.…”

Section: Jhep07(2022)026 1 Introductionmentioning

confidence: 99%

Precision measurement of forward Z boson production in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV

Aaij

Abdelmotteleb²,

Beteta³

et al. 2022

J. High Energ. Phys.

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A precision measurement of the Z boson production cross-section at $$ \sqrt{\mathrm{s}} $$ s = 13 TeV in the forward region is presented, using pp collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.1 fb−1. The production cross-section is measured using Z → μ+μ− events within the fiducial region defined as pseudorapidity 2.0 < η < 4.5 and transverse momentum pT> 20 GeV/c for both muons and dimuon invariant mass 60 < Mμμ< 120 GeV/c2. The integrated cross-section is determined to be$$ \sigma \left(Z\to {\mu}^{+}{\mu}^{-}\right)=196.4\pm 0.2\pm 1.6\pm 3.9\ \mathrm{pb}, $$ σ Z → μ + μ − = 196.4 ± 0.2 ± 1.6 ± 3.9 pb , where the first uncertainty is statistical, the second is systematic, and the third is due to the luminosity determination. The measured results are in agreement with theoretical predictions within uncertainties.

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Publisher Correction: The asymmetry of antimatter in the proton

Cited by 15 publications

References 0 publications

Impact of SeaQuest data on PDF fits at large x

Impact of SeaQuest data on PDF fits at large x

Estimation of combinatoric background in seaquest using an event-mixing method

Precision measurement of forward Z boson production in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV

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