Kinematic strangeness production in cluster hadronization

Abstract

We present a modification to the non-perturbative strangeness production mechanisms in the Monte-Carlo event generator Herwig in order to make the processes more dynamic and collective. We compare the model to a series of observables for soft physics at both LEP and LHC.

Spacetime colour reconnection in Herwig 7

“…We have kept the probability for strangeness production during the non-perturbative gluon splitting as the tuned value from [14], although there have been recent developments in the description of non-perturbative strangeness production in cluster hadronization [58]. We leave a full retune of all the hadronization parameters to future work.…”

Confronting experimental data with heavy-ion models: Rivet for heavy ions

“…The discovery of heavy-ion-like effects in pp collisions has spurred a lot of interest from the proton-proton Monte-Carlo authors to introduce models for such effects [43][44][45][46][47][48][49][50]. The inclusion of heavy-ion features in Rivet will aid this development, as such features can be used directly in new analyses for pp as well.…”

Hyperfine splitting effects in string hadronization

“…The surprising discovery from LHC [1] of continuous strangeness enhancement with final state multiplicity across collision systems, has spurred a renewed interest in hadronization models. While increased strangeness production in heavy ion collisions is traditionally seen as a signature of Quark-Gluon Plasma (QGP) formation [2][3][4], microscopic hadronization models such as the Lund string model [5] or the cluster model [6] can describe similar effects using models of cluster reconnections [7,8] or string interactions, such as rope formation [9,10] or junction formation [10,11]. In the case of junction formation, even more attention has been gathered by the observation that also charm baryon yields are enhanced in hadronic collisions compared to e + e − [12].…”