This title appears in the Scientific Report :
2001
Please use the identifier:
http://dx.doi.org/10.1016/S0370-2693(01)00538-X in citations.
Please use the identifier: http://hdl.handle.net/2128/10736 in citations.
Diffractive beauty photoproduction as a short distance probe of QCD pomeron
Diffractive beauty photoproduction as a short distance probe of QCD pomeron
High-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...
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Personal Name(s): | Zoller, V. R. |
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Contributing Institute: |
Institut 3 (Theoretische Kernphysik); IKP-3 |
Published in: | Physics letters / B, 509 (2001) |
Imprint: |
Amsterdam
North-Holland Publ.
2001
|
DOI: |
10.1016/S0370-2693(01)00538-X |
Document Type: |
Journal Article |
Research Program: |
Theoretische Kernphysik |
Series Title: |
Physics Letters B
509 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10736 in citations.
High-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. |