Evolution of the electroweak structure functions of nucleons

Reno, Mary Hall

doi:10.1140/epjs/s11734-021-00288-6

Cited by 5 publications

(3 citation statements)

References 109 publications

(135 reference statements)

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“…We use the VFNS version to be consistent with the nCTEQ15 PDFs, extracted in the same scheme, and considering the kinematical range of Q 2 values we are mostly interested in. For example, for E ν = 100 GeV, the ν τ charged current DIS cross section on nucleons has Q 2 = 23 GeV 2 , while for ντ at the same incident energy, Q 2 = 13 GeV 2 [72]. Most of the CC events come from higher energies where Q 2 is even higher.…”

Section: Interaction Cross Sectionsmentioning

confidence: 99%

Parton distribution function uncertainties in theoretical predictions for far-forward tau neutrinos at the Large Hadron Collider

Bai

Diwan

Garzelli

et al. 2022

J. High Energ. Phys.

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New experiments dealing with neutrinos in the far-forward region at the Large Hadron Collider (LHC) are under design or already in preparation. Two of them, FASERν and SND@LHC, are expected to be active during Run 3 and have the potential to detect the interactions of ν and $$ \overline{\nu} $$ ν ¯ that come from high-energy collisions in one of the LHC interaction points, extracted along the direction tangent to the beam line. Tau neutrinos and antineutrinos come predominantly from $$ {D}_s^{\pm } $$ D s ± production in pp collisions, followed by the leptonic decay of these mesons. Neutrino pseudorapidities in the range of η > 6.9 and η > 8.9 are relevant to these future experiments. At such pseudorapidities at high energies, QCD theoretical predictions for the flux of ντ plus $$ \overline{\nu} $$ ν ¯ τ rely on parton distribution functions (PDFs) in a combination of very small and large parton−x values. We evaluate PDF un certainties affecting the flux of ντ + $$ \overline{\nu} $$ ν ¯ τ produced by $$ {D}_s^{\pm } $$ D s ± decay in the far forward region at the LHC. Next-to-leading order (NLO) QCD uncertainties are included in the calculation of $$ {D}_s^{\pm } $$ D s ± production and NLO PDF sets are used for consistency. The theoretical uncertainty associated with the 40 PDF sets of the PROSA19 group amounts to ±(20 − 30)% for the (ντ + $$ \overline{\nu} $$ ν ¯ τ) number of charged-current (CC) events. Scale uncertainties are much larger, resulting in a range of CC event predictions from ~70% lower to ~90% higher than the central prediction. A comparison of the predictions with those obtained using as input the central PDFs from the 3-flavour NLO PDF sets of the CT14, ABMP16 and NNPDF3.1 collaborations show that far-forward neutrino energy distributions vary by as much as a factor of ~2 – 4 relative to the PROSA19 predictions at TeV neutrino energies. The Forward Physics Facility in the high luminosity LHC era will provide data capable of constraining NLO QCD evaluations with these PDF sets.

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Section: Interaction Cross Sectionsmentioning

confidence: 99%

Parton distribution function uncertainties in theoretical predictions for far-forward tau neutrinos at the Large Hadron Collider

Bai

Diwan

Garzelli

et al. 2022

J. High Energ. Phys.

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“…For comparison, we also present the cross sections evaluated with the PROSA PDF set in the variable flavour number scheme (VFNS) [27]. We use the VFNS version to be consistent with the nCTEQ15 PDFs, extracted in the same scheme, and considering the kinematical range of Q 2 values we are mostly interested in.For example, for E ν = 100 GeV, the ν τ charged current DIS cross section on nucleons has Q 2 = 23 GeV 2 , while for ντ at the same incident energy, Q 2 = 13 GeV 2 [51]. Most of the CC events come from higher energies where Q 2 is even higher.…”

Section: Tau Neutrino and Antineutrino Production From Charmmentioning

confidence: 99%

Parton distribution function uncertainties in theoretical predictions for far-forward tau neutrinos at the Large Hadron Collider

Bai,

Diwan,

Garzelli

et al. 2021

Preprint

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New experiments to measure neutrinos in the far-forward region at the Large Hadron Collider (LHC) are under design or already in preparation. Two of them, Faser-ν and SND@LHC, are expected to be active during Run 3 and have the potential to detect neutrinos that come from high-energy collisions in one of the LHC interaction points, extracted along the direction tangent to the beam line. Tau neutrinos and antineutrinos come predominantly from D ± s production in pp collisions, followed by the leptonic decay of these mesons. Neutrino pseudorapidities in the range of η > 6.9 and η > 8.9 are relevant to these future experiments. At such large pseudorapidities at high energies, theoretical predictions rely on parton distribution functions (PDFs) in a combination of very small and large parton−x values. We evaluate PDF uncertainties in a next-to-leading order (NLO) QCD calculation of the flux of tau neutrinos plus antineutrinos produced by D ± s decay in the far forward region at the LHC. The theoretical uncertainty associated with the 40 PDF sets of the PROSA19 group amount to ±(20 − 30)% for the tau neutrino plus antineutrino number of charged-current events. Scale uncertainties are much larger, resulting into a range of charged-current event predictions from ∼ 70% lower to ∼ 90% higher than the central prediction. A comparison of the predictions with those obtained using as input the central PDFs from the 3-flavour NLO PDF sets of the CT14, ABMP16 and NNPDF3.1 collaborations show that far-forward neutrino energy distributions vary by as much as a factor of ∼ 2 − 4 relative to the PROSA19 predictions at TeV neutrino energies. The Forward Physics Facility in the high luminosity LHC era will provide data capable of constraining NLO QCD evaluations with these PDF sets.

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“…The cross sections of charged current neutrino reaction are examined to analyze the mechanism of the neutrinoinduced meson production reaction, and a possible way to test the model of the axial vector current contribution. In the case of deep inelastic scattering, the evolution of the electroweak structure functions of nucleons has been studied by Reno [38] in the context of muon and tau neutrino and antineutrino scattering. Ansari et al [39], in their review article, discuss the effect of nonperturbative corrections such as target mass correction and higher twist effects, perturbative evolution of the parton densities, nuclear medium modifications of the nucleon structure functions, and nuclear isoscalarity corrections on the weak nuclear structure functions in (anti)neutrino-nucleus scattering in the deep inelastic scattering region.…”

mentioning

confidence: 99%