A model for low-pT hadronic reactions with generalizations to hadron-nucleus and nucleus-nucleus collisions

Andersson, Bo; Gustafson, Gösta; Nilsson-Almqvist, Bo

doi:10.1016/0550-3213(87)90257-4

Cited by 806 publications

(437 citation statements)

References 16 publications

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“…In the default version, partons are recombined with the parent strings when they stop interacting. The resulting strings are later converted into hadrons using the Lund string fragmentation model [56,57]. In the string melting version, the initial strings are melted into partons whose interactions are described by a parton cascade model [58].…”

Section: Comparison With Amptmentioning

confidence: 99%

Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

J. High Energ. Phys.

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The elliptic, triangular, quadrangular and pentagonal anisotropic flow coefficients for π ± , K ± and p+p in Pb-Pb collisions at √ s NN = 2.76 TeV were measured with the ALICE detector at the Large Hadron Collider. The results were obtained with the Scalar Product method, correlating the identified hadrons with reference particles from a different pseudorapidity region. Effects not related to the common event symmetry planes (non-flow) were estimated using correlations in pp collisions and were subtracted from the measurement. The obtained flow coefficients exhibit a clear mass ordering for transverse momentum (p T ) values below ≈ 3 GeV/c. In the intermediate p T region (3 < p T < 6 GeV/c), particles group at an approximate level according to the number of constituent quarks, suggesting that coalescence might be the relevant particle production mechanism in this region. The results for p T < 3 GeV/c are described fairly well by a hydrodynamical model (iEBE-VISHNU) that uses initial conditions generated by A Multi-Phase Transport model (AMPT) and describes the expansion of the fireball using a value of 0.08 for the ratio of shear viscosity to entropy density (η/s), coupled to a hadronic cascade model (UrQMD). Finally, expectations from AMPT alone fail to quantitatively describe the measurements for all harmonics throughout the measured transverse momentum region. However, the comparison to the AMPT model highlights the importance of the late hadronic rescattering stage to the development of the observed mass ordering at low values of p T and of coalescence as a particle production mechanism for the particle type grouping at intermediate values of p T for all harmonics.

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Section: Comparison With Amptmentioning

confidence: 99%

Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

J. High Energ. Phys.

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“…The difference arises from using the different structure functions, as would be expected from Eq. (8). We see that, although there is a difference between the curves, it is not large.…”

Section: Quark and Gluon Interactions And P -P Collisionsmentioning

confidence: 68%

“…The string-parton model is different in some essential ways from models based on the ideas of the classical string that use collision generator concepts, the (LUND [7], FRITIOF [8], RQMD [9], and QGSM [10]) models. The strings in the DSP model are not longitudinal; they are evolved according to the dynamics of the underlying Lagrangian.…”

Section: Introductionmentioning

confidence: 99%

Relativistic heavy-ion collisions in the dynamical string-parton model

et al. 2001

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We develop and extend the dynamical string parton model. This model, which is based on the salient features of QCD, uses classical Nambu-Gotō strings with the endpoints identified as partons, an invariant string breaking model of the hadronization process, and interactions described as quark-quark interactions. In this work, the original model is extended to include a phenomenological quantization of the mass of the strings, an analytical technique for treating the incident nucleons as a distribution of string configurations determined by the experimentally measured structure function, the inclusion of the gluonic content of the nucleon through the introduction of purely gluonic strings, and the use of a hard parton-parton interaction taken from perturbative QCD combined with a phenomenological soft interaction. The limited number of parameters in the model are adjusted to e + e − and p -p data. Utilizing these parameters, the first calculations of the model for p -A and A-A collisions are presented and found to be in reasonable agreement with a broad set of data. 25.75.+r, 12.38.Mh

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“…• FTFP BERT the Quark Gluon String fragmentation model from the QGSP BERT is substituted with the Fritiof model [183]. In this model, the low energy treatment of quasi-elastic nucleon scattering and nuclear diffraction process is improved at low eneergies with respect to the Quark Gluon String model.…”

Section: D22 Calorimeter Response and Dead Materials Uncertaintymentioning

confidence: 99%

Measurement of the Inclusive Jet Cross Section with the ATLAS Detector at the Large Hadron Collider

Doglioni

2012

Springer Theses

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This thesis presents the measurement of the inclusive jet cross section using data collected in 2010 by the ATLAS detector, with a particular focus on the reconstruction and calibration techniques used for jets in this measurement and on the estimate of the systematic uncertainty on their energy scale. The inclusive jet cross section measurement is used as input to fits of parton distribution functions. Although the PDF analysis in this thesis is preliminary and its main purpose is to serve as a proof of principle for future studies, improvements in the knowledge of the gluon density are observed thanks to the inclusion of ATLAS data.iv v Acknowledgements

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A model for low-pT hadronic reactions with generalizations to hadron-nucleus and nucleus-nucleus collisions

Cited by 806 publications

References 16 publications

Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV

Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV

Relativistic heavy-ion collisions in the dynamical string-parton model

Measurement of the Inclusive Jet Cross Section with the ATLAS Detector at the Large Hadron Collider

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