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CERN Document Server 2,044 records found  1 - 10nextend  jump to record: Search took 0.21 seconds. 
1.
(100)
F/sub 2//sup p/ at low Q/sup 2/ and the total gamma p cross section at HERA / Levonian, S
New precise measurements of the neutral current cross section at HERA are presented in different Q/sup 2/ regimes. In the photoproduction limit the total gamma p cross section is found to be in agreement with the universal soft Pomeron prediction. [...]
2001
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.427-9 (vol.1)
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2.
(91)
Investigations on the transition from nonperturbative to perturbative QCD in inelastic $e^{+}$p scattering at HERA / Surrow, B (CERN)
Recent results on the measurement of the proton structure function F /sub 2/ from both HERA experiments H1 and ZEUS, allowed us to investigate the behavior of F/sub 2/ in the transition region from photoproduction to deep-inelastic scattering. The x and Q/sup 2/ dependence of F/sub 2/ in the transition region is quantified using a simple phenomenological fit. [...]
Geneva : CERN, 2000
In : 3rd International Conference in Quark Confinement and Hadron Spectrum, Newport News, VA, USA, 7 - 12 Jun 1998, pp.277-80
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3.
(85)
Exclusive $\pi^{+}\pi^{-}\pi^{+}\pi^{-}$ and $\pi^{+}\pi^{0}\pi^{-} \pi^{0}$ production in two photon collisions at L3 / Fedin, O ; Nesterov, S ; Sultanov, G G ; Vorobev, I
Exclusive rho /sup 0/ rho /sup 0/ and rho /sup +/ rho /sup -/ production in two-photon collisions for quasi-real photons and rho /sup 0/ rho /sup 0/ production, involving highly virtual photons, was measured by the L3 experiment at LEP. The spin-parity-helicity analysis of rho /sup 0/ rho /sup 0/ and rho /sup +/ rho /sup -/ systems at Q/sup 2/ approximately= 0 was performed. [...]
2004 - Published in : Nucl. Phys. B, Proc. Suppl. 126 (2004) 283-8
In : International Conference on the Structure and Interactions of the Photon, Frascati, Italy, 7 - 11 Apr 2003, pp.283-8
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4.
(79)
Study of deep inelastic muon scattering on carbon, to the highest energies and Q/sup 2/ available at the CERN-SPS / Sacquin, Yu
Reports on preliminary determination of the structure function F/sub 2 / at different energies (120, 200, 240 GeV) with the NA4 apparatus. The results show no significant scaling violations in the Q/sup 2/ range 50-200 GeV/sup 2/. [...]
1980
In : 15th Rencontres de Moriond, v.1, Les Arcs, France, 9 - 21 Mar 1980, pp.385-93
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5.
(73)
The proton structure function F/sub 2/ at low Q/sup 2/ and low x / Pellegrino, A
The recent measurements of the proton structure function F/sub 2/ made by the H1 and ZEUS collaborations span six orders of magnitude both in the virtuality of the photon, Q/sup 2/, and in the Bjorken scaling variable, x. The data exhibit a clear transition from the (approximate) scaling behavior of F2 to a much stronger Q/sup 2/-dependence at low Q/sup 2/. [...]
2001
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.430-1 (vol.1)
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6.
(67)
Measurement of the low-x behaviour of the photon structure function $F_{2}^{\gamma}$ / Clay, E W (CERN) /OPAL Collaboration
The photon structure function F/sub 2//sup gamma /(x, Q/sup 2/) has been measured using data taken by the OPAL detector at e/sup +/e/sup -/ centre-of-mass energies of 91 GeV and 189 GeV, in Q/sup 2/ ranges of 1.5-6.0 GeV/sup 2/ (LEP1), and 7.0-30 GeV/sup 2/ (LEP2), probing the lowest possible values of x. The latest Monte Carlo programs and new methods, such as multi-variable unfolding, have been used to reduce model dependent systematic errors in the measurement. [...]
Geneva : CERN, 2000 - 6 p. - Published in : Nucl. Phys. B, Proc. Suppl. 82 (2000) 30-5
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7.
(65)
Measurement of the low-x behaviour of the photon structure function / Kartvelishvili, V G (Manchester Univ)
The photon structure function F/sub 2//sup gamma /(x, Q/sup 2/) has been measured using data taken by the OPAL detector at e/sup +/e/sup -/ centre-of-mass energies of 91 GeV, 183 GeV and 189 GeV, in Q/sup 2 / ranges of 1.5-30.0 GeV/sup 2/ (LEP1), and 7.0-30.0 GeV/sup 2/ (LEP2), probing lower values of x than ever before. Since previous OPAL analyses, new Monte Carlo models and new methods, such as multi- variable unfolding, have been introduced, reducing significantly the model dependent systematic errors in the measurement. [...]
2001 - Published in : Nucl. Phys. B, Proc. Suppl. 96 (2001) 161-165
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8.
(64)
Exclusive two $\rho^{0}$-mesons production in $\gamma\gamma^{*}$ collision / Anikin, I V ; Pire, B ; Teryaev, O V
We give a theoretical description of the L3 Collaboration data on the cross-section of the exclusive two rho -mesons production in gamma gamma * collision with large photon virtuality. These data prove the scaling behaviour of the leading twist generalized distribution amplitude of vector mesons. [...]
2004 - Published in : Nucl. Phys. B, Proc. Suppl. 126 (2004) 277-282
In : International Conference on the Structure and Interactions of the Photon, Frascati, Italy, 7 - 11 Apr 2003, pp.277-282
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9.
(61)
New measurements of inclusive diffraction at HERA / Newman, P R
Two new diffractive measurements from HERA are described. ZEUS data on the diffractive structure function F/sub 2//sup D/ at low Q/sup 2/ constrain the transition in diffraction from the perturbative high Q /sup 2/ region to the photoproduction limit. [...]
2001
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.448-51 (vol.1)
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10.
(58)
E155X measurements of the structure functions g/sub 2//sup p/ and g /sub 2//sup n/ / Trentalange, S (Dept of Phys, California Univ, Los Angeles, CA, USA)
We report on measurements of the transverse spin structure functions for the proton and neutron (deuteron) using deep inelastic electron scattering on transversely polarized solid targets. Data cover the range 1 GeV/sup 2/ < Q/sup 2/ < 20 GeV/sup 2/ and 0.02 < x < 0.9. [...]
2001
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.420-2 (vol.1)
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