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| 2. |
- Enberg, Rikard, et al.
(författare)
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Hard colour singlet exchange and gaps between jets at the Tevatron
- 2002
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Ingår i: Physics Letters B. - 0370-2693 .- 1873-2445. ; 524:3-4, s. 273-282
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Tidskriftsartikel (refereegranskat)abstract
- The new kind of events with a rapidity gap between two high-ET jets, observed in high energy collisions at the Tevatron, is found to be well described by the exchange of a colour singlet gluon system in the BFKL framework. This requires going beyond the conventional asymptotic Mueller–Tang approximation, which results in qualitatively different features of the basic parton–parton scattering amplitude. Non-leading corrections to the BFKL equation are included by incorporation of the consistency constraint and the running QCD coupling. Hadronisation and other non-perturbative QCD effects are treated through a complete Monte Carlo simulation, providing a gap survival probability that varies event-by-event, facilitating comparison with experimental results.
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| 3. |
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| 4. |
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| 5. |
- Jung, Hannes, et al.
(författare)
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What HERA may provide?
- 2008
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Ingår i: Proceedings, 16th International Workshop on Deep Inelastic Scattering and Related Subjects (DIS 2008): London, UK, April 7-11, 2008. - Amsterdam : Science Wise Publishing. ; , s. 17-17
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 6. |
- Kwiecinski, J., et al.
(författare)
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Two-photon cross-sections from the saturation model
- 2002
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Ingår i: Acta Physica Polonica B. - : Jagellonian University, Cracow. - 0587-4254 .- 1509-5770. ; B33:6, s. 1559-
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Tidskriftsartikel (refereegranskat)abstract
- A saturation model for the total \gamma \gamma and \gamma* \gamma* cross-sections and for the real photon structure function F2\gamma (x,Q2) is described. The model is based on a QCD dipole picture of high energy scattering. The two-dipole cross-section is assumed to satisfy the saturation property with the saturation radius taken from the GBW analysis of the \gamma*p interaction at HERA. The model is combined with the QPM and non-pomeron reggeon contributions and it gives a very good description of the data on the \gamma \gamma total cross-section, on the photon structure function F2\gamma (x,Q2) at low x and on the \gamma* \gamma* cross-section. Production of heavy quarks in \gamma \gamma collisions is also studied.
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| 7. |
- Poludniowski, Gavin, et al.
(författare)
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Vector Meson Photoproduction from the BFKL Equation II: Phenomenology
- 2003
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Ingår i: Journal of High Energy Physics (JHEP). - : Springer Science and Business Media LLC. - 1126-6708 .- 1029-8479. ; 12, s. 002-
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Tidskriftsartikel (refereegranskat)abstract
- Diffractive vector meson photoproduction accompanied by proton dissociation is studied for large momentum transfer. The process is described by the non-forward BFKL equation which we use to compare to data collected at the HERA collider.
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| 8. |
- Tîmneanu, Niccusor, et al.
(författare)
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Saturation model for 2-gamma physics
- 2002
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Ingår i: Acta Physica Polonica B. - : Jagellonian University, Cracow. - 0587-4254 .- 1509-5770. ; B33:10, s. 3045-3050
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Tidskriftsartikel (refereegranskat)abstract
- We introduce a saturation model for photon-photon interactions, based on a QCD dipole picture of high energy scattering. The two-dipole cross-section is assumed to satisfy the saturation property. This pomeron-like contribution is supplemented with QPM and non-pomeron reggeon contributions. The model gives a very good description of the data on the \gamma \gamma total cross-section, on the photon structure function F2\gamma (x,Q2) at low x and on the \gamma * \gamma * cross section.
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| 9. |
- Timneanu, Niccusor, et al.
(författare)
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Saturation model for two-photon interactions at high energies
- 2002
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Ingår i: European Physical Journal C. - : Springer-Verlag, Berlin, Heidelberg. - 1434-6044 .- 1434-6052. ; 23:3, s. 513-526
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Tidskriftsartikel (refereegranskat)abstract
- We formulate and analyse a saturation model for the total γγ and γ∗γ∗ cross-sections and for the real photon structure function Fγ2(x,Q2) . The model is based on a picture in which the γ∗γ∗ total cross-section for arbitrary photon virtualities is driven by the interaction of colour dipoles into which the virtual photons fluctuate. The cross-section describing this interaction is assumed to satisfy the saturation property with the saturation radius taken from the Golec-Biernat and Wüsthoff analysis of the γ∗p interaction at HERA. The model is supplemented by the QPM and non-pomeron reggeon contributions. The model gives a very good description of the data on the γγ total cross-section, on the photon structure function Fγ2(x,Q2) at lowx and on the γ∗γ∗ cross-section extracted from LEP double tagged events. The production of heavy flavours in γγ collisions is also studied. Predictions of the model for the very high energy range which will be probed at future linear colliders are given.
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