E.C. Aschenauer | Researchain

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Featured researches published by E.C. Aschenauer.

Physical Review Letters | 2000

Measurement of the spin asymmetry in the photoproduction of pairs of high-pT hadrons at HERMES

A. Airapetian; M. Amarian; E.C. Aschenauer; J. Blouw; H.J. Bulten; de P.K.A. Witt Huberts; M.G. Guidal; T. Henkes; H Ihssen; M. Kolstein; H.R. Poolman; van den J.F.J. Brand; van der G. Steenhoven; van J.J. Hunen; J. Visser

We present a measurement of the longitudinal spin asymmetry A|| in photoproduction of pairs of hadrons with high transverse momentum pT. Data were accumulated by the HERMES experiment using a 27.5 GeV polarized positron beam and a polarized hydrogen target internal to the HERA storage ring. For h^+h^- pairs with _(pT)^(h1)>1.5GeV/c and _(pT)^(h2)>1.0GeV/c, the measured asymmetry is A_(||) = -0.28±0.12(stat)±0.02(syst). This negative value is in contrast to the positive asymmetries typically measured in deep inelastic scattering from protons, and is interpreted to arise from a positive gluon polarization.

Physics Letters B | 2000

Nuclear effects on R = sigma(L)/sigma(T) in deep-inelastic scattering.

K. Ackerstaff; M. Amarian; E.C. Aschenauer; J. Blouw; H.J. Bulten; de P.K.A. Witt Huberts; M.G. Guidal; T. Henkes; H Ihssen; M. Kolstein; H.R. Poolman; van den J.F.J. Brand; van der G. Steenhoven; van J.J. Hunen; J. Visser

This erratum revokes the main conclusion of a Letter that reported measurements of cross sections for deep-inelastic scattering (DIS) of leptons on

Physics Letters B | 1995

Photon-induced proton knockout from 208Pb

I. Bobeldijk; C. Van den Abeele; J.-O. Adler; Be Andersson; E.C. Aschenauer; L.J. de Bever; D. Branford; S.A. Bulychjov; Thomas Davinson; K. Hansen; D. G. Ireland; L. Isaksson; D. Ivanov; D. G. Johnstone; A. Khanov; L. Lapikás; L.J. Lindgren; G. De Meyer; Björn Nilsson; H. Ruijter; Dirk Ryckbosch; A. Sandell; Alan C. Shotter; Bernd Schröder; G. van der Steenhoven; P. Svensson; van Uden; R. Van de Vyver

Nuclear Physics | 1997

Photon-induced proton knockout from 208Pb and 12C

E.C. Aschenauer; C. Van den Abeele; J.-O. Adler; Bo Andersson; L.J. de Bever; I. Bobeldijk; D. Branford; S.A. Bulychjov; T. Davinson; K. Hansen; D. G. Ireland; L. Isaksson; D. Ivanov; D. G. Johnstone; A. Khanov; L. Lapikás; L.J. Lindgren; G. De Meyer; D. Van Neck; Björn Nilsson; H. Ruijter; D. Ryckbosch; A. Sandell; A.C. Shotter; Bernd Schröder; V. Van der Sluys; G. van der Steenhoven; P. Svensson; M. A. van Uden; R. Van de Vyver

He and

Physics Letters B | 1996

The mass-dependence of meson-exchange currents in the reaction (γ,p)☆

E.C. Aschenauer; I. Bobeldijk; D. G. Ireland; L. Lapikás; D. Van Neck; Bernd Schröder; V. Van der Sluys; G. van der Steenhoven; R. Van de Vyver

^{14}

Physics Letters B | 2001

Alpha-cluster knockout in the O-16(e,e 'alpha)C-12 reaction

G. De Meyer; E.C. Aschenauer; H.P. Blok; D.L. Groep; K. Hicks; H. Holvoet; E. Jans; L. Lapikás; B. Lannoy; G.J.L. Nooren; C.J.G. Onderwater; Dirk Ryckbosch; J.D. Schipper; J. J. M. Steijger; M.F.M. Steenbakkers; M. Tytgat; G. van der Steenhoven; R. Van de Vyver; L. Van Hoorebeke; M. A. van Uden; J. Volmer

N targets, expressed as ratios of

Physical Review Letters | 2000

Evidence for a single-spin azimuthal asymmetry in semi-inclusive pion ekectroproduction.

A. Airapetian; M. Amarian; E.C. Aschenauer; J. Blouw; H.J. Bulten; de P.K.A. Witt Huberts; M.G. Guidal; T. Henkes; H Ihssen; M. Kolstein; van den J.F.J. Brand; van der G. Steenhoven; van J.J. Hunen; J. Visser

sigma_A / sigma_D

Physical Review Letters | 1998

Signatures for short-range correlations in ^{16}O Observed in the Reaction ^{16}O(e,e'pp)^{14}C

C.J.G. Onderwater; K. Allaart; E.C. Aschenauer; Th. Bauer; D. Boersma; E. Cisbani; W. H. Dickhoff; S. Frullani; F. Garibaldi; W.J.W. Geurts; C. Giusti; D.L. Groep; W.H.A. Hesselink; M. Iodice; E. Jans; N. Kalantar-Nayestanaki; W.J. Kasdorp; C. Kormanyos; L. Lapikás; J.J. van Leeuwe; R. De Leo; A. Misiejuk; H. Müther; F.D. Pacati; Antonio Pellegrino; R. Perrino; R. Starink; M.F.M. Steenbakkers; G. van der Steenhoven; J. J. M. Steijger

to the cross section on the deuterium target.Cross section ratios for deep-inelastic scattering from 14N and 3He with respect to 2H have been measured by the HERMES experiment at DESY using a 27.5 GeV positron beam. The data cover a range in the Bjorken scaling variable x between 0.013 and 0.65, while the negative squared four-momentum transfer Q2 varies from 0.5 to 15 GeV2. The data are compared to measurements performed by NMC, E665, and SLAC on 4He and 12C, and are found to be different for x<0.06 and Q2<1.5 GeV2. The observed difference is attributed to an A-dependence of the ratio R=σL/σT of longitudinal to transverse deep-inelastic scattering cross sections at low x and low Q2.This erratum revokes the main conclusion of a Letter that reported measurements of cross sections for deep-inelastic scattering (DIS) of leptons on

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