Do we need two pomerons?

A traditional Regge model with a Q 2 -independent Pomeron intercept closed (or equal) to one is constructed in order to describe the available data on the proton structure function. A Dipole Pomeron model which does not explicitly violate unitarity is developed and investigated. An excellent agreement with the 1209 data is found (χ 2 /dof = 1.11) in the whole kinematical domain investigated by experiments. A comparison of the model with already existing ones is made. The x−, Q 2 −slopes and the effective intercept are discussed as Q 2 and x functions. †

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“…Note that (19) does not depend on x, in general an effective intercept does not coincide with x-slope.…”

Section: Comparison With Other Modelsmentioning

confidence: 99%

“…Besides, a two pomerons model [18] and other models were proposed which smoothly interpolate between a soft and a hard Q 2 −dependence [19] or combine these behaviours [20]. Of course, such a picture for the pomeron does not correspond to a true Regge singularity.…”

Section: Introductionmentioning

confidence: 99%

New possibilities of old soft pomeron in DIS

Desgrolard¹,

Lengyel²,

Martynov³

1999

Eur. Phys. J. C

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“…In our opinion, there is only one Pomeron in the nature [4]: nevertheless, for the sake of completeness, we have included in our analysis the above parametrization as well.…”

Section: Introductionmentioning

confidence: 99%

How fast do small x structure functions rise? A comparative analysis

et al. 1999

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“…Various models to cope with the above requirements have been suggested [20,21,22]. At HERA, especially at large Q 2 , scaling is so badly violated that it may not be explicit anymore.…”

Section: Q 2 − Dependencementioning

confidence: 99%

“…1. Veneziano, or resonance-reggeon, duality [5] and Bloom-Gilman, or hadron-parton, duality [6] in strong interactions the residue is chosen to satisfy approximate Bjorken scaling for the structure function [20,21]. Assuming the Reggeon (or Pomeron) exchange to be a simple pole, the residue function obeys the factorization property: it is a product of two vertices -the γγR(P ) and N N R(P ), where N stands for the nucleon (see Fig.…”

Section: Notation and Conventionsmentioning

confidence: 99%