Scaling of multiplicity distributions in high energy hadron collisions

Koba, Z.; Nielsen, H.B.; Olesen, P.

doi:10.1016/0550-3213(72)90551-2

Cited by 1,122 publications

(508 citation statements)

References 6 publications

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“…In the Feynman picture, the strongly interacting hadrons can be seen as bunches of point-like partons producing particles in interactions with small (soft) and large (hard) momentum transfer. As expected from Feynman scaling [1], at low centre-of-mass energies ( √ s), where particle production is dominated by soft interactions, the mean number of particles M was found to rise logarithmically with √ s. Moreover, the evolution of the charged particle multiplicity distribution P (M ) as a function of √ s follows the Koba-Nielsen-Oleson (KNO) scaling [2] with scaling variable z = M/ M and P (M ) M = ψ(z), where ψ(z) is an energy independent function. Experimentally one finds that KNO scaling is violated for √ s > 200 GeV [3].…”

Section: Introductionmentioning

confidence: 66%

Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC

Abelev

Adam

Adamová

et al. 2013

J. High Energ. Phys.

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We present the measurements of particle pair yields per trigger particle obtained from di-hadron azimuthal correlations in pp collisions at √ s = 0.9, 2.76, and 7 TeV recorded with the ALICE detector. The yields are studied as a function of the charged particle multiplicity. Taken together with the single particle yields the pair yields provide information about parton fragmentation at low transverse momenta, as well as on the contribution of multiple parton interactions to particle production. Data are compared to calculations using the PYTHIA6, PYTHIA8, and PHOJET event generators.

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Section: Introductionmentioning

confidence: 66%

Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC

Abelev

Adam

Adamová

et al. 2013

J. High Energ. Phys.

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“…There is more room for partons, strings, clusters or clans, more room for multiple collisions and different impact parameters contributions, more room for harder collisions and additional QCD branching [2]. In all these approaches, if there are no limitations, fluctuations increasingly dominate over average multiplicity: D 2 / n 2 increases and, asymptotically, it may reach a constant value (KNO scaling [3]). This kind of behaviour, as pointed out in [4], has been observed long ago in cosmic ray physics [5], with the negative binomial parameter k stabilising at a value of the order of 2.5-3, for √ s ≥ 1 TeV.…”

Section: The Problemmentioning

confidence: 99%

Density saturation and the decrease of the normalised width of the multiplicity distribution in high energy pp collisions

et al. 2004

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It is experimentally observed that the width of the KNO multiplicity distribution -or the negative binomial parameter, 1/k-for pp collisions, in the energy region 10 √ s 1800 GeV, is an increasing function of the energy. We argue that in models with parton or string saturation such trend will necessary change: at some energy the distribution will start to become narrower. In the framework of percolating strings, we have estimated the change to occur at an energy of the order of 5-10 TeV.

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“…At lower energy regions, a phenomenological description based on the Koba-Nielson-Olesen (KNO) scaling law is used [13]. First, averaged charged For the flux, we use an atmospheric ν µ neutrino spectrum at the South Pole [9].…”

Section: Genie Agky Hadronization Modelmentioning

confidence: 99%

First Look at PYTHIA8 Hadronization Program for Neutrino Interaction Generators

Katori

Lasorak

Mandalia

et al. 2016

Proceedings of the 10th International Workshop on Neutrino-Nucleus Interactions in Few-GeV Region (NuInt15)

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Current and future neutrino oscillation experiments utilize information of hadronic final states to improve sensitivities on oscillation parameters measurements. Among the physics of hadronic systems in neutrino interactions, the hadronization model controls multiplicities and kinematics of final state hadrons from the primary interaction vertex. For relatively high invariant mass events, neutrino interaction generators rely on the PYTHIA6 hadronization program. Here, we show a possible improvement of this process in neutrino event generators, by utilizing expertise from the HERMES experiment. Next, we discuss the possibility to implement the PYTHIA8 program in neutrino interaction generators, including GENIE and NEUT. Finally, we show preliminary comparisons of PYTHIA8 predictions with neutrino hadron multiplicity data from bubble chamber experiments within the GE-NIE hadronization validation tool.

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Scaling of multiplicity distributions in high energy hadron collisions

Cited by 1,122 publications

References 6 publications

Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC

Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC

Density saturation and the decrease of the normalised width of the multiplicity distribution in high energy pp collisions

First Look at PYTHIA8 Hadronization Program for Neutrino Interaction Generators

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