Dual parton model

Capella, A.; Sukhatme, U.; Tan, Chung-I; Vân, J. Trân Thanh

doi:10.1016/0370-1573(94)90064-7

Cited by 688 publications

(624 citation statements)

References 233 publications

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“…The general argument seems to be that the increase of energy implies phase-space opening. 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]).…”

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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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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“…In particular, the baryon stopping mechanism modeled in HIJING was found to underestimate the stopping in heavy nuclear collisions, while VENUS model was able to reproduce the baryon stopping and strange baryon production by introducing a new non-equilibrium dynamical mechanism called the double string. The mechanism in HIJING, adapted from the LUND Fritiof [7] and dual parton model (DPM) [8], involves diquark-quark string excitations followed by string breaking. The final valence baryons in this model always emerge within about a unit of rapidity from those of the unbroken diquarks.…”

Section: Introductionmentioning

confidence: 99%

Baryon Junction Stopping at the SPS and RHIC via HIJING/B

Vance¹,

Gyulassy²,

Wang³

1998

Advances in Nuclear Dynamics 4

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Baryon stopping at the SPS and RHIC energies is calculated by introducing a new baryon junction mechanism into HIJING. The exchange of a baryon junction, according to Regge phenomenology, leads to a cosh[(y − y CM )/2] rapidity dependence and an 1/ 4 √ s energy dependence of the inclusive baryon cross section. This baryon junction dynamics also leads naturally to enhanced p T broadening in pA and AA together with enhanced mid-rapidity hyperon production.

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“…For this reason in the last few years general interest has grown in "physically inspired" simulations. These are based upon theoretical and phenomenological models like QCD and the Dual Parton Model [24], capable of properly constraining the predictions where data do not exist, without the introduction of a large number of free parameters. It is worthwhile to mention the attempt to merge the DPMJET model [25] into the shower simulation of HEMAS [26], and the interface of the CORSIKA shower code [27] with different models, like HDPM (the original interaction model of CORSIKA), VENUS [28], QGSJET [29], SIBYLL [30], and the afore mentioned DPMJET.…”

Section: Uncertainties Of the Hadronic Interaction Modelmentioning

confidence: 99%

High statistics measurement of the underground muon pair separation at Gran Sasso

et al. 1999

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We present a measurement of the underground decoherence function using multi-muon events observed in the MACRO detector at Gran Sasso at an average depth of 3800 hg/cm 2 .Muon pair separations up to 70 m have been measured, corresponding to parent mesons with P ⊥ ≤ 1÷2 GeV/c. Improved selection criteria are used to reduce detector effects mainly in the low distance separation region of muon pairs. Special care is given to a new unfolding procedure designed to minimize systematic errors in the numerical algorithm. The accuracy of the measurement is such that the possible contribution of rare processes, such as µ ± + N → µ ± + N + µ + + µ − , can be experimentally studied.The measured decoherence function is compared with the predictions of the hadronic interaction model of the HEMAS Monte Carlo code. Good agreement is obtained. We interpret this agreement to indicate that no anomalous P ⊥ components in soft hadronNucleus and Nucleus-Nucleus collisions are required by the MACRO experimental data.Preliminary comparisons with other Monte Carlo codes point out that the uncertainties associated with the hadronic interaction model may be as large as 20%, depending on the energy. MACRO data can be used as a benchmark for future work on the discrimination of shower models in the primary energy region around and below the knee of the spectrum.

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Dual parton model

Cited by 688 publications

References 233 publications

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

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

Baryon Junction Stopping at the SPS and RHIC via HIJING/B

High statistics measurement of the underground muon pair separation at Gran Sasso

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