Relativistic calculation of structure functions b1,2(x) of the deuteron

Umnikov, A. Yu.

doi:10.1016/s0370-2693(96)01440-2

Cited by 16 publications

(14 citation statements)

References 23 publications

(50 reference statements)

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“…It should be mentioned that the magnitude of b 1 at x < 0.1 exceeds estimates from previous model calculations which are applicable at moderate and large x, by several orders of magnitude (see e.g. [259,260]). Unfortunately, the effect of b 1 in the observable asymmetry, which is proportional to b 1 /F d 1 , is only of the order of 10 −2 , as already mentioned.…”

Section: The Tensor Structure Function B 1 At Small Xmentioning

confidence: 59%

Nuclear deep-inelastic lepton scattering and coherence phenomena

Piller¹,

Weise²

2000

Physics Reports

175

241

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This review outlines our present experimental knowledge and theoretical understanding of deepinelastic scattering on nuclear targets. The emphasis is primarily on nuclear coherence phenomena, such as shadowing, where the key physics issue is the exploration of hadronic and quark-gluon fluctuations of a high-energy virtual photon and their passage through the nuclear medium. New developments in polarized deep-inelastic scattering on nuclei are also discussed, and more conventional binding and Fermi motion effects are summarized. The report closes with a brief outlook on vector meson electroproduction, nuclear shadowing at very large Q 2 and the physics of high parton densities in QCD.

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Section: The Tensor Structure Function B 1 At Small Xmentioning

confidence: 59%

Nuclear deep-inelastic lepton scattering and coherence phenomena

Piller¹,

Weise²

2000

Physics Reports

175

241

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show abstract

“…For larger values of x the computed results are not significantly different from 0. This result combined with the very small large x results for nucleonic [1,5,6] and double-scattering contributions [8][9][10], makes the case that an observation of a value of b 1 significantly different than zero for values of x greater than about 0.3 would represent a discovery of some sort of exotic nuclear physics. Our model Eq.…”

Section: Resultsmentioning

confidence: 98%

“…Given this violation of the sum rule of Close & Kumano, it is interesting to see if the extant calculations of other mechanisms are consistent with the sum rule. Consider first the nucleonic contribution [1,5,6]. In particular we examine Eq.…”

Section: Resultsmentioning

confidence: 99%

“…The function b 1 vanishes if the spin-one target is made of constituents at rest or in a relative s-state, but is very small for a target of spin 1/2 particles moving non-relativistically in higher angular momentum states [1,[4][5][6]. Thus one expects [1] that a nuclear b 1 may be dominated by non-nucleonic components of the target nuclear wave function.…”

Section: Introductionmentioning

confidence: 99%

“…At such a value of x, any sea quark effect such as arising from double-scattering or virtual pions is completely negligible. Furthermore, the nucleonic contributions are computed to be very small [4][5][6], so one must consider other possibilities. We therefore take up the possibility that the deuteron has a six-quark component that is orthogonal to two nucleons.…”

Section: Introductionmentioning

confidence: 99%

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Pionic and hidden-color, six-quark contributions to the deuteronb1structure function

Miller

2014

Phys. Rev. C

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The b 1 structure function is an observable feature of a spin-1 system sensitive to non-nucleonic components of the target nuclear wave function. The contributions of exchanged pions in the deuteron are estimated and found to be of measurable size for small values of x. A simple model for a hidden-color, six-quark configurations (with ∼ 0.15% probability to exist in the deuteron) is proposed and found to give substantial contributions for values of x > 0.2. Good agreement with Hermes data is obtained. Predictions are made for an upcoming JLab experiment. The Close & Kumano sum rule is investigated and found to be a useful guide to understanding various possible effects that may contribute.

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Light-front holographic ρ-meson distributions in the momentum space

Kaur

Mondal

Dahiya

2021

J. High Energ. Phys.

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We present the leading-twist quark transverse momentum-dependent parton distribution functions (TMDs) for the spin-1 target, such as the ρ-meson, in the light-front framework. Specifically, we predict the TMDs in the light-front holographic model and compare with the light-front quark model predictions. We obtain the TMDs using the overlap of the light-front wave functions. We evaluate the k⊥ moments upto second order and compare with the available theoretical predictions. Further, we analyze the leading-twist parton distribution functions (PDFs) of the ρ-meson in the light-front holographic model which are found to be in accord with the Nambu-Jona-Lasinio (NJL) model and the light-front quark model predictions. We further study the QCD evolution of the PDFs. The positivity bounds on the TMDs and the PDFs are also discussed. We also present the quark spin densities in the transverse momentum plane for different polarization configurations of the quark and the ρ-meson target.

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Relativistic calculation of structure functions b1,2(x) of the deuteron

Cited by 16 publications

References 23 publications

Nuclear deep-inelastic lepton scattering and coherence phenomena

Nuclear deep-inelastic lepton scattering and coherence phenomena

Pionic and hidden-color, six-quark contributions to the deuteronb1structure function

Light-front holographic ρ-meson distributions in the momentum space

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