Damtp 96/48 the Soft Pomeron
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چکیده
The soft pomeron successfully correlates a wide variety of data. Its properties seem rather simple: it couples to single quarks and its coupling factorises.
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The Bfkl Pomeron: Can It Be Detected? Damtp 96/47
The BFKL pomeron is swamped by the soft pomeron, at least at t = 0. Figure 1 shows data for the pp and ¯ pp total cross-sections. The curves 1 corrrespond to the exchange of the ρ, ω, f, a trajectories, whose contribution falls with increasing energy approximately as 1/ √ s, and a rising soft-pomeron-exchange term which rises as s 0.08. There is a clear disagreement between the two Tevatron dat...
متن کاملar X iv : h ep - p h / 96 06 30 7 v 1 1 2 Ju n 19 96 The pomeron - pomeron interaction in the perturbative QCD
The pomeron-pomeron interaction is studied in the perturbative approach of BFKL-Bartels. The total pomeron-pomeron cross-section is proportional to α 4 s s ∆ / √ t 1 t 2 where √ s is the c.m. energy and t 1,2 are the virtualities of the colliding pomerons. Upon calculating the coefficient the cross-section is found to be of the order 2.2 mb at √ s = 6 TeV and √ −t 1 ∼ √ −t 2 ∼ 1 GeV/c.
متن کاملar X iv : h ep - p h / 96 12 23 5 v 1 3 D ec 1 99 6 Model ( In ) dependent Features of the Hard Pomeron
We discuss the small-x behaviour of the next-to-leading BFKL equation, depending on various smoothing out procedures of the running coupling constant at low momenta. While scaling violations (with resummed and calculable anomalous dimensions) turn out to be always consistent with the renormalization group, we argue that the nature and the location of the so-called hard Pomeron are dependent on ...
متن کاملar X iv : h ep - p h / 03 04 07 9 v 1 8 A pr 2 00 3 ON A TWO POMERON DESCRIPTION OF THE F 2 STRUCTURE FUNCTION
We perform a global fit to the inclusive structure function considering a QCD inspired model based on the summation of gluon ladders describing the ep scattering. In lines of a two Pomeron approach, the structure function F 2 has a hard piece given by the model and the remaining soft contributions: the soft Pomeron and non-singlet content. We have investigated several choices for the soft Pomer...
متن کاملA Review of the Soft Pomeron a 2 Deep Inelastic Scattering
Soft pomeron fits reproduce all zero-Q 2 data for light quarks, but run into problems at HERA for heavy mesons and for high Q 2 , and at the Tevatron for W diffractive production. I review the basic properties of the soft pomeron, and outline the possibilities which have been considered to account for the new data. At high energy, pomeron exchange controls total cross sections, single-and doubl...
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