Baryon production from cluster hadronisation

Gieseke, Stefan; Kirchgaeßer, Patrick; Plätzer, Simon

doi:10.1140/epjc/s10052-018-5585-7

Cited by 45 publications

(52 citation statements)

References 29 publications

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“…Colour reconnection aims to minimize a given measure of the event, typically momentum-based. Herwig 7 has a variety of colour reconnection algorithms [12,14], namely:…”

Section: Colour Reconnectionmentioning

confidence: 99%

“…If a pairing reduces the invariant mass, it is allowed to reconnect with a flat probabilistic weight, typically tuned to LHC data, while ensuring that the model doesn't adversely affect LEP simulations. Baryonic colour reconnection was recently implemented in Herwig 7 [14], and it uses a more sophisticated algorithm. For each cluster in the event, the algorithm searches for other clusters which occupy the same neighbourhood in rapidity-space.…”

Section: Colour Reconnectionmentioning

confidence: 99%

“…Multiple parton interactions were first introduced in [6], and implemented in Pythia [4], where its importance in hadronic collisions was highlighted beyond a doubt. A similar physical notion was introduced in [7] and later implemented in Herwig++ [1,8,9], with some recent improvements to soft and diffractive scatterings in [2,10] to Herwig 7. One such model of this interference between subcollisions in an event is colour reconnection [11][12][13][14][15], whereby a Monte Carlo event generator reduces some kinematic, momentum-based measure of the event. The physical intuition for such a mechanism is twofold: to correct for errors in the leading-colour approximation of the parton shower, and to allow multiple parton interactions, which may have been colour-connected, to have cross-talk.…”

Section: Introductionmentioning

confidence: 99%

“…Colour reconnection in Herwig 7 first focused on reconnecting excited qq pairs called clusters, minimizing the sum of the invariant masses. Later work [14] expanded upon this model to introduce the possibility of forming so-called baryonic clusters qqq andqqq from three ordinary/mesonic clusters. Other methods have investigated colour reconnection at the perturbative stages of event simulation or taken inspiration from perturbative techniques [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Without spacetime information, high energy event generators cannot hope to be able to describe hadronization of large systems well. This work aims to be the first steps of introducing spacetime coordinates and using them to aid the baryonic colour reconnection model [14]. We intend this to be a proof of concept that will allow us to apply this hadronization model to heavy ions in later work.…”

Section: Introductionmentioning

confidence: 99%

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Spacetime colour reconnection in Herwig 7

et al. 2019

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“…Colour reconnection aims to minimize a given measure of the event, typically momentum-based. Herwig 7 has a variety of colour reconnection algorithms [12,14], namely:…”

Section: Colour Reconnectionmentioning

confidence: 99%

Section: Colour Reconnectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spacetime colour reconnection in Herwig 7

et al. 2019

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Light-flavor particle production in high-multiplicity pp collisions at $$ \sqrt{\textrm{s}} $$ = 13 TeV as a function of transverse spherocity

Acharya,

Adamová,

Aglieri Rinella

et al. 2024

J. High Energ. Phys.

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Results on the transverse spherocity dependence of light-flavor particle production (π, K, p, ϕ, K*0, $$ {\textrm{K}}_{\textrm{S}}^0 $$ K S 0 , Λ, Ξ) at midrapidity in high-multiplicity pp collisions at $$ \sqrt{s} $$ s = 13 TeV were obtained with the ALICE apparatus. The transverse spherocity estimator $$ \left({S}_{\textrm{O}}^{p_{\textrm{T}}=1}\right) $$ S O p T = 1 categorizes events by their azimuthal topology. Utilizing narrow selections on $$ {S}_{\textrm{O}}^{p_{\textrm{T}}=1} $$ S O p T = 1 , it is possible to contrast particle production in collisions dominated by many soft initial interactions with that observed in collisions dominated by one or more hard scatterings. Results are reported for two multiplicity estimators covering different pseudorapidity regions. The $$ {S}_{\textrm{O}}^{p_{\textrm{T}}=1} $$ S O p T = 1 estimator is found to effectively constrain the hardness of the events when the midrapidity (|η| < 0.8) estimator is used.The production rates of strange particles are found to be slightly higher for soft isotropic topologies, and severely suppressed in hard jet-like topologies. These effects are more pronounced for hadrons with larger mass and strangeness content, and observed when the topological selection is done within a narrow multiplicity interval. This demonstrates that an important aspect of the universal scaling of strangeness enhancement with final-state multiplicity is that high-multiplicity collisions are dominated by soft, isotropic processes. On the contrary, strangeness production in events with jet-like processes is significantly reduced.The results presented in this article are compared with several QCD-inspired Monte Carlo event generators. Models that incorporate a two-component phenomenology, either through mechanisms accounting for string density, or thermal production, are able to describe the observed strangeness enhancement as a function of $$ {S}_{\textrm{O}}^{p_{\textrm{T}}=1} $$ S O p T = 1 .

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Production of pions, kaons, and protons as a function of the relative transverse activity classifier in pp collisions at $$ \sqrt{s} $$ = 13 TeV

Acharya¹,

Adamová²,

Adler³

et al. 2023

J. High Energ. Phys.

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The production of π±, K±, and $$ \left(\overline{\textrm{p}}\right)\textrm{p} $$ p ¯ p is measured in pp collisions at $$ \sqrt{s} $$ s = 13 TeV in different topological regions of the events. Particle transverse momentum (pT) spectra are measured in the “toward”, “transverse”, and “away” angular regions defined with respect to the direction of the leading particle in the event. While the toward and away regions contain the fragmentation products of the near-side and away-side jets, respectively, the transverse region is dominated by particles from the Underlying Event (UE). The relative transverse activity classifier, RT = NT/〈NT〉, is used to group events according to their UE activity, where NT is the measured charged-particle multiplicity per event in the transverse region and 〈NT〉 is the mean value over all the analysed events. The first measurements of identified particle pT spectra as a function of RT in the three topological regions are reported. It is found that the yield of high transverse momentum particles relative to the RT-integrated measurement decreases with increasing RT in both the toward and the away regions, indicating that the softer UE dominates particle production as RT increases and validating that RT can be used to control the magnitude of the UE. Conversely, the spectral shapes in the transverse region harden significantly with increasing RT. This hardening follows a mass ordering, being more significant for heavier particles. Finally, it is observed that the pT-differential particle ratios $$ \left(\textrm{p}+\overline{\textrm{p}}\right)/\left({\uppi}^{+}+{\uppi}^{-}\right) $$ p + p ¯ / π + + π − and (K+ + K−)/(π+ + π−) in the low UE limit (RT → 0) approach expectations from Monte Carlo generators such as PYTHIA 8 with Monash 2013 tune and EPOS LHC, where the jet-fragmentation models have been tuned to reproduce e+e− results.

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Baryon production from cluster hadronisation

Cited by 45 publications

References 29 publications

Spacetime colour reconnection in Herwig 7

Spacetime colour reconnection in Herwig 7

Light-flavor particle production in high-multiplicity pp collisions at $$ \sqrt{\textrm{s}} $$ = 13 TeV as a function of transverse spherocity

Production of pions, kaons, and protons as a function of the relative transverse activity classifier in pp collisions at $$ \sqrt{s} $$ = 13 TeV

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