Triple-pomeron dynamics: valence vs. glue
Three pomerons are known to couple via the gluon loop and interactions of this kind, which are responsible for high-mass diffraction, are described in terms of the gluonic structure function of the QCD pomeron. We show that the triple-pomeron coupling via the light quark loop associated with the “va...
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| Published in: | Nuclear physics. Section B, Proceedings supplement Vol. 146; pp. 217 - 219 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01.09.2005
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| ISSN: | 0920-5632, 1873-3832 |
| Online Access: | Get full text |
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| Summary: | Three pomerons are known to couple via the gluon loop and interactions of this kind, which are responsible for high-mass diffraction, are described in terms of the gluonic structure function of the QCD pomeron. We show that the triple-pomeron coupling via the light quark loop associated with the “valence” in the pomeron is of the same strength as the purely gluonic coupling. The large
Q
2 behavior of this new contribution is described by the DLLA evolution from the non-perturbative
f
f
¯
valence state of the pomeron. Numerical estimates of the high-mass diffraction structure functions based on the consistent account of both couplings are in good agreement with experimental data. |
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| ISSN: | 0920-5632 1873-3832 |
| DOI: | 10.1016/j.nuclphysbps.2005.02.099 |