Altinoluk, TolgaArmesto Pérez, NéstorKovner, AlexLevin, EugeneLublinsky, Michael2020-04-162020-04-162014Altinoluk, T., Armesto, N., Kovner, A. et al. KLWMIJ Reggeon field theory beyond the large N c limit. J. High Energ. Phys. 2014, 7 (2014). https://doi.org/10.1007/JHEP08(2014)0071029-8479http://hdl.handle.net/10347/21457We 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 constanteng© 2014 The Authors. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were madehttps://creativecommons.org/licenses/by/4.01/N ExpansionQCDjournal article10.1007/JHEP08(2014)007open access