%0 Journal Article
%A Knutsson, A.
%T Multiple interactions at HERA
%J Nuclear physics  / B / Proceedings supplements
%V 191
%@ 0920-5632
%C Amsterdam
%I Elsevier
%M PUBDB-2015-04361
%P 141 - 150
%D 2009
%Z © Elsevier B.V.
%X Presented are recent measurements in ep collisions at HERA, which comprise results that are expected to be sensitive to multiple interactions and the underlying event. A measurement of 3- and 4-jet event cross-sections in photoproduction, as well as two measurements which target the activity in the soft underlying event in photoproduction and deep inelastic scattering at low photon virtuality (Q^2), respectively, are reviewed. The data are compared to various QCD models with and without multiple i nteractions simulated. The multijet event cross-sections are in addition compared to a fixed-order O(@a@a_s^2) calculation.
%B Ringberg Workshop on New Trends in HERA Physics 2008
%C 5 Oct 2008 - 10 Oct 2008, Ringberg Castle (Germany)
Y2 5 Oct 2008 - 10 Oct 2008
M2 Ringberg Castle, Germany
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000267433400015
%R 10.1016/j.nuclphysbps.2009.03.121
%U https://bib-pubdb1.desy.de/record/276003