Bartels, Jochen, Golec-Biernat, Krzysztof, Motyka, Leszek
Higher twist effects in the deeply inelastic scattering are studied. We start with a short review of the theoretical results on higher twists in QCD. Within the saturation model we perform a twist...
The topology of the triple Pomeron vertex in N=4 SYM (2009)
Bartels, Jochen, Hentschinski, Martin, Mischler, Anna-Maria
We investigate, within N=4 SYM, the high energy behavior in the triple Regge limit of a six point correlator of R-currents. Using the leading logarithmic approximation, we sum all diagrams whose...
What HERA may provide ? (2008)
Jung, Hannes, De Roeck, Albert, Bartels, Jochen, Behnke, Olaf, Blumlein, Johannes, Brodsky, Stanley, ...
More than 100 people participated in a discussion session at the DIS08 workshop on the topic What HERA may provide. A summary of the discussion with a structured outlook and list of desirable...
A momentum Space Analysis of the Triple Pomeron Vertex in pQCD (2007)
Bartels, Jochen, Kutak, Krzysztof
We study properties of the momentum space Triple Pomeron Vertex in perturbative QCD. Particular attention is given to the collinear limit where transverse momenta on one side of the vertex are much...
The Pomeranchuk Singularity and Vector Boson Reggeization in Electroweak Theory (2006)
Bartels, Jochen, Lipatov, Lev N., Peters, Krisztian
We investigate the high energy behaviour of vector boson scattering in the electroweak sector of the standard model. In analogy with the BFKL analysis in QCD we compute production amplitudes in the...
Small x Phenomenology - summary of the 3rd Lund Small x Workshop in 2004 (2006)
Collaboration, The Small X, Bartels, Jochen, Barnafoldi, Gergely G., Chachamis, Grigorios, Collins, John, ...
A third workshop on small-x physics, within the Small-x Collaboration, was held in Hamburg in May 2004 with the aim of overviewing recent theoretical progress in this area and summarizing the...
Small x Phenomenology - summary of the 3rd Lund Small x Workshop in 2004 (2006)
Andersen Serguei Baranov, Jeppe R., Bartels, Jochen, Barnafoldi, Gergely G., Chachamis, Grigorios, Collins, John, ...
A third workshop on small-x physics, within the Small-x Collaboration, was held in Hamburg in May 2004 with the aim of overviewing recent theoretical progress in this area and summarizing the...
$\gamma^* \gamma^*$ Scattering via Secondary Reggeon Exchange in QCD (2004)
Bartels, Jochen, Lublinsky, Michael
We summarize the results on the high energy behavior of quark-antiquark exchange in $\gamma^* \gamma^*$ elastic scattering. The ladder diagrams, summed in the double logarithmic approximation,...
Effect of the Charm Quark Mass on the BFKL gamma^* gamma^* Total Cross Section at LEP (2000)
Bartels, Jochen, Ewerz, Carlo, Staritzbichler, René
We perform a numerical study of various improvements of the LO BFKL prediction for the gamma^* gamma^* total cross section in the kinematical region of the L3 detector at LEP. In particular, we study...
Unitarity Corrections in High Energy QCD (1999)
The high energy limit of QCD is investigated in the generalized leading logarithmic approximation. We study unitarity corrections to the BFKL Pomeron containing t-channel states with up to six...
Factorization of Twist-Four Gluon Operator Contributions (1999)
Bartels, Jochen, Bontus, Claas, Spiesberger, Hubert
We consider diagrams with up to four t-channel gluons in order to specify gluonic twist-four contributions to deep inelastic structure functions. This enables us to extend the method developed by...
An Estimate of Twist-Four Contributions at Small x and Low Q^2 (1999)
Bartels, Jochen, Bontus, Claas
We present a first study of gluonic twist-four corrections to the deep inelastic structure function F_2 at small x and small Q^2. The calculations are based upon the double logarithmic approximation...
A Parametrisation of the Inclusive Diffractive Cross Section at HERA (1998)
Bartels, Jochen, Royon, Christophe
A recently proposed parametrization for the deep inelastic diffractive cross section is used to describe the H1 94 data. We find two possible solutions, and we discuss them is some detail.
Physics with e+ e- linear colliders (1997)
Accomando, E, Andreazza, A, Anlauf, H, Ballestrero, A, Barklow, T, Bartels, Jochen, ...
How does the BFKL pomeron couple to quarks? (1995)
Bartels, Jochen, Forshaw, J R, Lotter, H, Lipatov, L N, Ryskin, M G, Wusthoff, M
Identifizierung und Synthese flüchtiger Inhaltsstoffe von Borkenkäfern. (1988)
Hamburg, Univ., Diss., 1988.
THEORETICAL REMARKS ABOUT E P COLLISIONS (1978)
Bartels, Jochen, Buras, A J, Cabibbo, N, Close, F E, Combridge, B L, De Rujula, A, ...
In *CERN 78-02, Cheep - AN E-P FACILITY IN THE SPS*, GENEVA 1978, 7-58