Double parton scattering in pp collisions at {Mathematical expression} GeV

T. Åkesson, M. G. Albrow, S. Almehed, O. Benary, H. Bøggild, O. Botner, H. Breuker, A. A. Carter, J. R. Carter, Y. Choi, W. E. Cleland, S. Dagan, E. Dahl-Jensen, I. Dahl-Jensen, G. Damgaard, C. W. Fabjan, U. Goerlach, K. H. Hansen, V. Hedberg, G. JarlskogS. Katsanevas, N. J. Kjaer, R. Kroeger, K. Kulka, D. Lissauer, B. Lörstad, A. Markou, N. A. McCubbin, U. Mjörnmark, R. Møller, B. S. Nielsen, L. Olsen, Y. Oren, J. Schukraft, K. Spang, H. Specht, M. Sullivan, H. H. Thodberg, J. A. Thompson, E. Vella, J. Williamson, W. J. Willis

Research output: Contribution to journalArticlepeer-review


In a study of pp collisions at {Mathematical expression} GeV with more than 29 GeV total transverse energy emitted into 1.8 units of rapidity in the central region, we have extracted a sample of 4-jet events and compared it with models of the two sources of 4-jet production: double bremsstrahlung and double parton scattering. The data cannot be described by bremsstrahlung alone, and we extract the fraction of 4-jet events attributed to double parton scattering for various definitions of the 4-jet sample. We determine the double parton scattering/2-jet yield ratio, and this leads to a determination of the proton radius. We discuss the implications of our observations for the general understanding of high-ΣET events.

Original languageEnglish
Pages (from-to)163-174
Number of pages12
JournalEuropean Physical Journal C
Issue number2
StatePublished - Jun 1987


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