Hypothesis of Limiting Fragmentation in High-Energy Collisions

Benecke, J.; Chou, T.T.; Yang, C. N.; Yen, E.

doi:10.1103/physrev.188.2159

Cited by 794 publications

(289 citation statements)

References 27 publications

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“…being considered as a function of η = η − y beam , where y beam = ln( √ s NN /m p ) is the beam rapidity [14,20]. This observation obeys a hypothesis of the limiting fragmentation scaling [21].…”

mentioning

confidence: 93%

Universality of particle production and energy balance in hadronic and nuclear collisions

Mishra

Sarkisyan

Sahoo

et al. 2016

EPJ Web of Conferences

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Abstract. The multihadron production in nucleus-nucleus and (anti)proton-proton collisions is studied by exploring the collision-energy and centrality dependencies of the mean multiplicity in the existing data. The study is performed in the framework of the recently proposed effective-energy approach which combines the constituent quark picture and Landau hydrodynamics counting for the centrality-defined effective energy of participants. Within this approach, the multiplicity energy dependence and the pseudorapidity spectra from the most central nuclear collisions are well reproduced. The study of the multiplicity centrality dependence reveals a new scaling between the measured pseudorapidity spectra and the calculations. Using this scaling, called the energy balanced limiting fragmentation scaling, the pseudorapidity spectra are well reproduced for all centralities. The scaling clarifies some differences in the multiplicity and midrapidity density centrality dependence from RHIC and LHC. A similarity in the multiplicity energy dependence in the most central collisions and centrality data is shown. Predictions are drawn for the mean multiplicities to be measured in hadronic and heavy-ion collisions at the LHC.1. In this report, we discuss our recent results on the universality of multiparticle production in nucleus-nucleus (AA) and hadronic interactions in view of a new scaling obtained [1]. The study exploites concept of effective energy [2] employed for the data interpreted in terms of the approach of the dissipating energy of quark participants [3,4], or, for brevity, the participant dissipating energy (PDE) approach. This approach combines the constituent quark picture together with Landau relativistic hydrodynamics and interrelates different types of collisions. The earlier observations [2] are made by studying the dependencies of the pseudorapidity density and transverse energy pseudorapidity density at midrapidity on the collision center-of-mass (c.m.) energy in hadronic and the most central (head-on) AA collisions and on the number of nucleon participants, or centrality, in AA collisions in the entire available energy range of the existing data. The complementarity of the measurements in a

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mentioning

confidence: 93%

Universality of particle production and energy balance in hadronic and nuclear collisions

Mishra

Sarkisyan

Sahoo

et al. 2016

EPJ Web of Conferences

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“…On the one hand, several measurements [141][142][143] have given evidence for the existence of an extended longitudinal scaling (also called "limiting fragmentation" [144]) region close to beam rapidity, which increases with √ s N N (figure 1.20-left). On the other hand, measurements in the forward region can be used to study baryon density effects on particle production, essentially changing the chemistry of the produced quark-gluon system [145,146].…”

Section: Forward Physics: Low-x Partons Baryon-rich Qcd Matter and mentioning

confidence: 99%

CMS Physics Technical Design Report: Addendum on High Density QCD with Heavy Ions

d’Enterria¹,

Ballintijn²,

Bedjidian³

et al. 2007

J. Phys. G: Nucl. Part. Phys.

150

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This report presents the capabilities of the CMS experiment to explore the rich heavy-ion physics programme offered by the CERN Large Hadron Collider (LHC). The collisions of lead nuclei at energies √ s N N = 5.5 TeV, will probe quark and gluon matter at unprecedented values of energy density. The prime goal of this research is to study the fundamental theory of the strong interaction -Quantum Chromodynamics (QCD) -in extreme conditions of temperature, density and parton momentum fraction (low-x).This report covers in detail the potential of CMS to carry out a series of representative Pb-Pb measurements. These include "bulk" observables, (charged hadron multiplicity, low p T inclusive hadron identified spectra and elliptic flow) which provide information on the collective properties of the system, as well as perturbative probes such as quarkonia, heavy-quarks, jets and high p T hadrons which yield "tomographic" information of the hottest and densest phases of the reaction.

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“…The limiting fragmentation hypothesis, first proposed by Benecke, et al [37], suggests that fragmentation cross sections reach asymptotic values at sufficiently high incident-projectile energies. In other words, above a given bombarding energy, both the differential and total production cross sections remain constant.…”

Section: Fermi Break-upmentioning

confidence: 99%

Production of energetic light fragments in extensions of the CEM and LAQGSM event generators of the Monte Carlo transport code MCNP6

et al. 2017

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We extend the cascade-exciton model (CEM), and the Los Alamos version of the quark-gluon string model (LAQGSM), event generators of the Monte-Carlo N-particle transport code version 6 (MCNP6), to describe production of energetic light fragments (LF) heavier than 4 He from various nuclear reactions induced by particles and nuclei at energies up to about 1 TeV/nucleon. In these models, energetic LF can be produced via Fermi break-up, preequilibrium emission, and coalescence of cascade particles. Initially, we study several variations of the Fermi break-up model and choose the best option for these models. Then, we extend the modified exciton model (MEM) used by these codes to account for a possibility of multiple emission of up to 66 types of particles and LF (up to 28 Mg) at the preequilibrium stage of reactions. Then, we expand the coalescence model to allow coalescence of LF from nucleons emitted at the intranuclear cascade stage of reactions and from lighter clusters, up to fragments with mass numbers A ≤ 7, in the case of CEM, and A ≤ 12, in the case of LAQGSM. Next, we modify MCNP6 to allow calculating and outputting spectra of LF and heavier products with arbitrary mass and charge numbers. The improved version of CEM is implemented into MCNP6. Finally, we test the improved versions of CEM, LAQGSM, and MCNP6 on a variety of measured nuclear reactions. The modified codes give an improved description of energetic LF from particle-and nucleus-induced reactions; showing a good agreement with a variety of available experimental data. They have an improved predictive power compared to the previous versions and can be used as reliable tools in simulating applications involving such types of reactions.

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Hypothesis of Limiting Fragmentation in High-Energy Collisions

Cited by 794 publications

References 27 publications

Universality of particle production and energy balance in hadronic and nuclear collisions

Universality of particle production and energy balance in hadronic and nuclear collisions

CMS Physics Technical Design Report: Addendum on High Density QCD with Heavy Ions

Production of energetic light fragments in extensions of the CEM and LAQGSM event generators of the Monte Carlo transport code MCNP6

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