KLWMIJ Reggeon field theory beyond the large Nc limit

Tolga Altinoluk, Néstor Armesto, Alex Kovner, Eugene Levin, Michael Lublinsky

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Abstract: We extend the analysis of KLWMIJ evolution in terms of QCD Reggeon fields beyond leading order in the 1/Nc expansion. We show that there is only one type of corrections to the leading order Hamiltonian discussed in [1]. These are terms linear in original Reggeons and quadratic in conjugate Reggeon operators. All of these have the interpretation as vertices of the “‘merging”’ type 2 → 1, where two Reggeons merge into one. Importantly, the triple Pomeron merging vertex does not emerge from the KLWMIJ Hamiltonian. We show that, although in the range of applicability of the KLWMIJ Hamiltonian these merging terms are subleading in Nc, in the dense-dense regime they all become of the same (leading) order in Nc. In this regime vertices involving higher Reggeons are enhanced by inverse powers of the coupling constant.

Original languageEnglish
Article number7
Pages (from-to)1-27
Number of pages27
JournalJournal of High Energy Physics
Issue number8
StatePublished - 1 Aug 2014


  • 1/N Expansion
  • QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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