Deep Inelastic Scattering of Polarized Electrons by Polarized Protons

Alguard, M. J.; Ash, W. W.; Baum, G.; Clendenin, J. E.; Cooper, P. S.; Coward, D. H.; Ehrlich, R.; Etkin, A.; Hughes, V. W.; Kobayakawa, H.; Kondo, K.; Lubell, M. S.; Miller, R.H.; Palmer, D. A.; Raith, Wilhelm; Sasao, N.; Schüler, K. P.; Sherden, D. J.; Sinclair, C. K.; Souder, P. A.

doi:10.1103/physrevlett.37.1261

Cited by 265 publications

(175 citation statements)

References 11 publications

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“…between the relevant matrix elements while the other set ('valence' scenario) assumed an extremely broken SU(3) f symmetry reflected in relating [2] the hyperon β-decay matrix elements to the first moments of the corresponding valence distributions. Both scenarios gave satisfactory descriptions [1] of the measured spin-asymmetries [3][4][5][6][7][8][9] A p,n 1 (x, Q 2 ) ≃ g p,n 1 (x, Q 2 )/F p,n 1 (x, Q 2 ), although the polarized gluon density δg(x, Q 2 ), which enters in LO only via the Q 2 -evolution equations, was only weakly constrained by present data.…”

Section: Introductionmentioning

confidence: 89%

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Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering

et al. 1996

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A next-to-leading order QCD analysis of spin asymmetries and structure functions in polarized deep inelastic lepton nucleon scattering is presented within the framework of the radiative parton model. A consistent NLO formulation of the Q 2 -evolution of polarized parton distributions yields two sets of plausible NLO spin dependent parton distributions in the conventional MS factorization scheme. They respect the fundamental positivity constraints down to the low resolution scale Q 2 = µ 2 N LO = 0.34 GeV 2 . The Q 2 -dependence of the spin asymmetries A p,n,d 1 (x, Q 2 ) is similar to the leading-order (LO) one in the range 1 ≤ Q 2 ≤ 20 GeV 2 and is shown to be non-negligible for x-values relevant for the analysis of the present data and possibly forthcoming data at HERA.

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Section: Introductionmentioning

confidence: 89%

“…Measurements of polarized deep inelastic lepton nucleon scattering yield direct information [3][4][5][6][7][8][9]12] on the spin-asymmetry…”

Section: Nlo Parton Distributions and Their Q -Evolutionmentioning

confidence: 99%

Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering

et al. 1996

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“…We take the experimental data points for M p 1 (Q 2 ) from Ref. [26], which have used the experimental results for the structure functions from [45][46][47][48][49][50][51][52].…”

Section: γ(Qmentioning

confidence: 99%

“…Therefore, we should recover the values in Eqs. (45)(46)(47)(48)(49) after performing the renormalization group running of Eqs. (51)(52)(53)(54).…”

mentioning

confidence: 99%

Fit to the Bjorken, Ellis-Jaffe and Gross-Llewellyn-Smith sum rules in a renormalon based approach

Campanario

Pineda

2005

Phys. Rev. D

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We study the large order behaviour in perturbation theory of the Bjorken, Ellis-Jaffe and Gross-Llewellyn-Smith sum rules. In particular, we consider their first infrared renormalons, for which we obtain their analytic structure with logarithmic accuracy and also an approximate determination of their normalization constant. Estimates of higher order terms of the perturbative series are given. The Renormalon subtracted scheme is worked out for these observables and compared with experimental data. Overall, good agreement with experiment is found. This allows us to obtainâ 0 and some higher-twist non-perturbative constants from experiment:â 0 = 0.141 ± 0.089; f 3,RS (1 GeV) = −0.124 +0.137 −0.142 GeV 2 .

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“…As for polarized partonic densities, we mainly use the parametrization of ref. [ 15], hereafter denoted as CN, which implements positivity constraints, Regge behaviour for X-->0, quark counting rules for X-> 1, the U (1 )A Goldberger-Treiman relation, and is in agreement with EMC and SLAC data [ 11,16]. Both sets of structure functions are computed at a particular value of Q 2 and then evoluted according to Altarelli-Parisi equations [ 17].…”

Section: The Left-right Asymmetrymentioning

confidence: 99%

Beam polarization at LHC and SSC. Expected asymmetries in the Bess model and comparison with other models

Casallbuoni

Chiappetta²,

Deandrea

et al. 1992

Physics Letters B

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In view of recent and foreseen technical advances in beam polarization in future proton colliders we discuss possible tests of non-standard physics at LHC and SSC assuming initial proton polarization, specifically to test for a strong electroweak sector and comparing with different extended gauge models. We examine lepton pair production, studying left-right and forward-backward asymmetries, assuming quark-antiquark and WW fusion production mechnisms. We discuss the uncertainties related to polarized proton structure functions.

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Deep Inelastic Scattering of Polarized Electrons by Polarized Protons

Cited by 265 publications

References 11 publications

Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering

Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering

Fit to the Bjorken, Ellis-Jaffe and Gross-Llewellyn-Smith sum rules in a renormalon based approach

Beam polarization at LHC and SSC. Expected asymmetries in the Bess model and comparison with other models

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