Nuclear parton distribution functions from neutrino deep inelastic scattering

Schienbein, I.; Yu, Jiyoung; Keppel, C.; Morfín, J. G.; Olness, Fred; Owens, J.F.

doi:10.1103/physrevd.77.054013

Cited by 105 publications

(137 citation statements)

References 53 publications

(67 reference statements)

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“…[41] are enhanced as compared to the nonstrange ones. While the KP model is based on microscopical description of the nucleon, the nuclear effects in the CTEQ analysis of Ref.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 97%

“…Meanwhile, a study of possible bias due to these assumptions is missing therefore a statistical significance of the observations of Ref. [41] is not fully quantified. Finally, an internal inconsistency of the inclusive NuTeV data [43] playing a central role in the CTEQ analysis has been recently revealed [44].…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

“…However, the CTEQ analysis of Ref. [41] is based on the NuTeV data [2,43] only, which do not have the power to constrain all of the PDF components. Therefore, additional external constraints have to be imposed on the CTEQ nuclear PDFs of Ref.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

“…Therefore, additional external constraints have to be imposed on the CTEQ nuclear PDFs of Ref. [41], in particular an assumption on the ratio d=u at large x, to ensure meaningful results. Meanwhile, a study of possible bias due to these assumptions is missing therefore a statistical significance of the observations of Ref.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

“…While the KP model is based on microscopical description of the nucleon, the nuclear effects in the CTEQ analysis of Ref. [41] are taken into account by introducing nuclear PDFs, which depend on the global nuclei characteristics, the charge and atomic number. Note, that the DIS data for light nuclear targets can discriminate these two approaches.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

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Determination of strange sea quark distributions from fixed-target and collider data

et al. 2015

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We present an improved determination of the strange sea distribution in the nucleon with constraints coming from the recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA. We demonstrate that the results are consistent with the data from the ATLAS and the CMS experiments on the associated production of W AE -bosons with c-quarks. We also discuss issues related to the recent strange sea determination by the ATLAS experiment using LHC collider data.

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“…[41] are enhanced as compared to the nonstrange ones. While the KP model is based on microscopical description of the nucleon, the nuclear effects in the CTEQ analysis of Ref.…”

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 97%

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

Section: New Data Sets Relevant For the Strange Sea Determinationmentioning

confidence: 99%

See 3 more Smart Citations

Determination of strange sea quark distributions from fixed-target and collider data

et al. 2015

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Untitled

Brodsky¹

2018

Light Cone 2016

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A remarkable feature of QCD is that the mass scale κ which controls color confinement and light-quark hadron mass scales does not appear explicitly in the QCD Lagrangian. However, de Alfaro, Fubini, and Furlan have shown that a mass scale can appear in the equations of motion without affecting the conformal invariance of the action if one adds a term to the Hamiltonian proportional to the dilatation operator or the special conformal operator. If one applies the same procedure to the light-front Hamiltonian, it leads uniquely to a confinement potential κ 4 ζ 2 for mesons, where ζ 2 is the LF radial variable conjugate to the qq invariant mass. The same result, including spin terms, is obtained using light-front holography -the duality between the front form and AdS 5 , the space of isometries of the conformal group -if one modifies the action of AdS 5 by the dilaton e κ 2 z 2 in the fifth dimension z. When one generalizes this procedure using superconformal algebra, the resulting light-front eigensolutions predict a unified Regge spectroscopy of meson, baryon, and tetraquarks, including remarkable supersymmetric relations between the masses of mesons and baryons of the same parity. One also predicts observables such as hadron structure functions, transverse momentum distributions, and the distribution amplitudes defined from the hadronic light-front wavefunctions. The mass scale κ underlying confinement and hadron masses can be connected to the parameter Λ M S in the QCD running coupling by matching the nonperturbative dynamics to the perturbative QCD regime. The result is an effective coupling α s (Q 2 ) defined at all momenta. The matching of the high and low momentum transfer regimes determines a scale Q 0 which sets the interface between perturbative and nonperturbative hadron dynamics. The use of Q 0 to resolve the factorization scale uncertainty for structure functions and distribution amplitudes, in combination with the principle of maximal conformality (PMC) for setting the 1 Invited talk presented at Light Cone renormalization scales, can greatly improve the precision of perturbative QCD predictions for collider phenomenology. The absence of vacuum excitations of the causal, frame-independent front-form vacuum has important consequences for the cosmological constant. I also discuss evidence that the antishadowing of nuclear structure functions is non-universal; i.e., flavor dependent, and why shadowing and antishadowing phenomena may be incompatible with sum rules for nuclear parton distribution functions.

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Probing gluon and heavy-quark nuclear PDFs with γ + Q production in pA collisions

Stavreva

Schienbein

Arleo

et al. 2011

J. High Energ. Phys.

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We present a detailed phenomenological study of direct photon production in association with a heavy-quark jet in pA collisions at the Relativistic Heavy Ion Collider (RHIC) and at the Large Hadron Collider (LHC) at next-to-leading order in QCD. The dominant contribution to the cross-section comes from the gluon-heavy-quark (gQ) initiated subprocess, making γ + Q production a process very sensitive to both the gluon and the heavy-quark parton distribution functions (PDFs). Additionally, the RHIC and LHC experiments are probing complementary kinematic regions in the momentum fraction x 2 carried by the target partons. Thus, the nuclear production ratio R γ+Q pA can provide strong constraints, over a broad x-range, on the poorly determined nuclear parton distribution functions which are extremely important for the interpretation of results in heavy-ion collisions.

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Nuclear parton distribution functions from neutrino deep inelastic scattering

Cited by 105 publications

References 53 publications

Determination of strange sea quark distributions from fixed-target and collider data

Determination of strange sea quark distributions from fixed-target and collider data

Untitled

Probing gluon and heavy-quark nuclear PDFs with γ + Q production in pA collisions

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