String formation beyond leading colour
By Jesper R. Christiansen, Peter Z. Skands. 2015
316 citations recorded by the source corpus.
A bstractWe present a new model for the hadronisation of multi-parton systems, in which colour correlations beyond leading NC are allowed to influence the formation of confining potentials (strings). The multiplet structure of SU(3) is combined with a minimisation of the string potential energy, to decide between which partons strings should form, allowing also for “baryonic” configurations (e.g., two colours can combine coherently to form an anticolour). In e+e−collisions, modifications to the leading-colour picture are small, suppressed by both colour and kinematics factors. But in pp collisions, multi-parton interactions increase the number of possible subleading connections, counteracting their naive 1/NC2 suppression. Moreover, those that reduce the overall string lengths are kinematically favoured. The model, which we have implemented in the PYTHIA 8 generator, is capable of reaching agreement not only with the important 〈p⊥〉 (ncharged) distribution but also with measured rates (and ratios) of kaons and hyperons, in both ee and pp collisions. Nonetheless, the shape of their p⊥ spectra remains challenging to explain.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/a4396b0773de272ecfb06d90b1808b1013eb5837
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In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- M. Schönherr
- Gudrun Heinrich
- S. Höche
- F. Krauss
- Ansgar Denner
- Stefan Kallweit
Citations in the corpus
- Systematics of quark/gluon tagging (2017, methodology): “Compared to the baseline, this variation uses an alternative “SU(3)”-based color reconnection model [110] (i.”
- Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, methodology): “Compared to the baseline, this variation uses an alternative “SU(3)”-based color reconnection model [476] (i.”
- Λ c + production in pp collisions at √s=7 TeV and in p-Pb collisions at √sNN=5.02 TeV (2017, methodology): “The measurements from pp collisions are compared with different event generators (quoted tunes for PYTHIA and DIPSY taken respectively from [17] and [18]).”