TY - JOUR

T1 - Unitarity boundary for deep inelastic structure functions

AU - Ayala Fo, A. L.

AU - Gay Ducati, M. B.

AU - Levin, E. M.

N1 - Funding Information:
It hasb eenp resentetdh ed erivationo f theu nitarity boundaryf or the deepi nelastics tructurefu nctions. The comparisono f the unitarityb oundaryw ith HERA experimentadla tas howst hatb oth F2(n , Q*) and xG(x, Q*) hit the unitarity limit at Q* x 2-4 GeV2. This fact givesr ise to a challengefo r the-oreticianst o explaint he matchingb etweenth e deep inelastics catteringa ndreal photoproductiopnr ocess in the frameworko f QCD. We hopet hatt his lettera s well as Ref. [24] will stimulatet he new round of the discussionso n the theoryo f the shadowingc orrectionsin the deepi n-elasticp rocessesW. e believet hatt her esolutiono f all difficultiesc ould be found assumingth att he SC has workedi n thef ull in theg luons tructurefu nctiona nd hasb eent akeni n thep henomenologicianli tial gluon distributionin standardp arameterization[ 5s, 26,27]. Howeverm, uchm orew ork is neededt o provet his. This work was supportedin part by the U.S. Departmenot f Energy, Division of High Energy Physics, ContractN o. W-31-109-ENG-38a nd by CNPq, CAPES andF INEP, Brazil.

PY - 1996/11/7

Y1 - 1996/11/7

N2 - In this letter we derive the unitarity boundaries in QCD for the deep inelastic structure function in low x kinematic region: the Froissart boundary and a more restricted one, linked with experiment and based on additional assumptions, justified in the leading log approximation of perturbative QCD. The comparison of the unitarity boundaries with the new HERA experimental data gives rise to a challenge for QCD to explain the matching between the deep inelastic scattering and real photoproduction process.

AB - In this letter we derive the unitarity boundaries in QCD for the deep inelastic structure function in low x kinematic region: the Froissart boundary and a more restricted one, linked with experiment and based on additional assumptions, justified in the leading log approximation of perturbative QCD. The comparison of the unitarity boundaries with the new HERA experimental data gives rise to a challenge for QCD to explain the matching between the deep inelastic scattering and real photoproduction process.

UR - http://www.scopus.com/inward/record.url?scp=0000367929&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(96)01149-5

DO - 10.1016/0370-2693(96)01149-5

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AN - SCOPUS:0000367929

SN - 0370-2693

VL - 388

SP - 188

EP - 196

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -