CMS pythia 8 colour reconnection tunes based on underlying-event data

Date Issued
01-07-2023
Author(s)
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Dragicevic, M.
Valle, A. Escalante Del
Frühwirth, R.
Jeitler, M.
Krammer, N.
Lechner, L.
Liko, D.
Mikulec, I.
Paulitsch, P.
Pitters, F. M.
Schieck, J.
Schöfbeck, R.
Schwarz, D.
Templ, S.
Waltenberger, W.
Wulz, C. E.
Darwish, M. R.
De Wolf, E. A.
Janssen, T.
Kello, T.
Lelek, A.
Sfar, H. Rejeb
Mechelen, P. Van
Putte, S. Van
Remortel, N. Van
Bols, E. S.
D’Hondt, J.
Delcourt, M.
Faham, H. El
Lowette, S.
Moortgat, S.
Morton, A.
Müller, D.
Sahasransu, A. R.
Tavernier, S.
Doninck, W. Van
Vannerom, D.
Beghin, D.
Bilin, B.
Clerbaux, B.
De Lentdecker, G.
Favart, L.
Kalsi, A. K.
Lee, K.
Mahdavikhorrami, M.
Makarenko, I.
Moureaux, L.
Paredes, S.
Pétré, L.
Popov, A.
Postiau, N.
Starling, E.
Thomas, L.
Bemden, M. Vanden
Velde, C. Vander
Vanlaer, P.
Cornelis, T.
Dobur, D.
Knolle, J.
Lambrecht, L.
Mestdach, G.
Niedziela, M.
Rendón, C.
Roskas, C.
Samalan, A.
Skovpen, K.
Tytgat, M.
Vermassen, B.
Wezenbeek, L.
Benecke, A.
Bethani, A.
Bruno, G.
Bury, F.
Caputo, C.
David, P.
Delaere, C.
Donertas, I. S.
Giammanco, A.
Jaffel, K.
Jain, Sa
Lemaitre, V.
Mondal, K.
Prisciandaro, J.
Taliercio, A.
Teklishyn, M.
Tran, T. T.
Vischia, P.
Wertz, S.
Alves, G. A.
Hensel, C.
Moraes, A.
Teles, P. Rebello
Júnior, W. L.Aldá
Pereira, M. Alves Gallo
DOI
Abstract
New sets of parameter tunes for two of the colour reconnection models, quantum chromodynamics-inspired and gluon-move, implemented in the pythia 8 event generator, are obtained based on the default CMS pythia 8 underlying-event tune, CP5. Measurements sensitive to the underlying event performed by the CMS experiment at centre-of-mass energies s=7 and 13 TeV , and by the CDF experiment at 1.96 TeV are used to constrain the parameters of colour reconnection models and multiple-parton interactions simultaneously. The new colour reconnection tunes are compared with various measurements at 1.96, 7, 8, and 13 TeV including measurements of the underlying-event, strange-particle multiplicities, jet substructure observables, jet shapes, and colour flow in top quark pair (t t ¯) events. The new tunes are also used to estimate the uncertainty related to colour reconnection modelling in the top quark mass measurement using the decay products of t t ¯ events in the semileptonic channel at 13 TeV .
Volume
83