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000031927 035__ $$9arXiv$$ahep-ph/0104093$$chep-ph
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000031927 035__ $$9arXiv$$aoai:arXiv.org:hep-ph/0104093$$zoai:arXiv.org:hep-ph/0104093
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000031927 041__ $$aeng
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000031927 084__ $$2WoS$$aPhysics, Multidisciplinary
000031927 1001_ $$0P:(DE-Juel1)VDB1851$$aZoller, V. R.$$b0
000031927 245__ $$aDiffractive beauty photoproduction as a short distance probe of QCD pomeron
000031927 260__ $$aAmsterdam$$bNorth-Holland Publ.$$c2001
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000031927 440_0 $$04934$$aPhysics Letters B$$v509$$x0370-2693$$y1
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000031927 500__ $$9arXiv$$a7 pages, Latex, 5 figures, PostScript Report-no: FZ-IKP(TH)-2000-30
000031927 520__ $$aHigh-energy open beauty photoproduction probes the vacuum exchange at distances similar to 1/m(b) and detects significant corrections to the BFKL asymptotics coming from the subleading vacuum poles. We show that the interplay of leading and subleading vacuum exchanges gives rise to the cross section sigma (b (b) over bar)(W) growing much faster than it is prescribed by the exchange of the leading pomeron trajectory with intercept alpha (P)(0) - 1 = Delta (P) = 0.4. Our calculations within the color dipole BFKL model are in agreement with the recent determination of sigma (b (b) over bar)(W) by th, H1 Collaboration. The comparative analysis of diffractive photoproduction of beauty, charm and light quarks exhibits the hierarchy of pre-asymptotic pomeron intercepts which follows the hierarchy of corresponding hardness scales, We comment on the phenomenon of decoupling of soft and subleading BFKL singularities at the scale of elastic gamma (1S)-photoproduction which results in precocious color dipole BFKL asymptotics of the process gammap --> gammap. (C) 2001 Published by Elsevier Science B.V.
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000031927 650_7 $$2INSPIRE$$aelectron p: inclusive reaction
000031927 650_7 $$2INSPIRE$$aphoton p: inclusive reaction
000031927 650_7 $$2INSPIRE$$abottom: photoproduction
000031927 650_7 $$2INSPIRE$$abottom: pair production
000031927 650_7 $$2INSPIRE$$adiffraction
000031927 650_7 $$2INSPIRE$$aquantum chromodynamics: pomeron
000031927 650_7 $$2INSPIRE$$acolor: dipole
000031927 650_7 $$2INSPIRE$$aLipatov equation
000031927 650_7 $$2INSPIRE$$aRegge poles
000031927 650_7 $$2INSPIRE$$achannel cross section: energy dependence
000031927 650_7 $$2INSPIRE$$ap: structure function
000031927 650_7 $$2INSPIRE$$aUpsilon(9460): photoproduction
000031927 650_7 $$2INSPIRE$$anumerical calculations
000031927 650_7 $$2INSPIRE$$ainterpretation of experiments: DESY HERA Stor
000031927 773__ $$0PERI:(DE-600)1466612-1$$a10.1016/S0370-2693(01)00538-X$$gVol. 509$$q509$$tPhysics letters / B$$v509$$x0370-2693$$y2001
000031927 8567_ $$uhttp://dx.doi.org/10.1016/S0370-2693(01)00538-X
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000031927 9131_ $$0G:(DE-Juel1)FUEK39$$bStruktur der Materie und Materialforschung$$k20.80.0$$lKernphysik$$vTheoretische Kernphysik$$x0
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