Results from the PHOBOS Experiment at RHIC

Back, B. B.; Baker, M. D.; Barton, D. S.; Betts, R. R.; Bindel, R.; Budzanowski, A.; Busza, W.; Carroll, A.; Decowski, M. P.; Garcia, E. Oliver; George, N.; Gulbrandsen, K.; Gushue, S.; Halliwell, C.; Heintzelman, G. A.; Henderson, C.; Hofman, D. J.; Hołyński, R.; Holzman, B.; Johnson, E.; Kane, J. L.; Katzy, J.; Khan, Nawazish A.; Kucewicz, W.; Kulinich, P.; Lin, W.; Manly, S.; McLeod, D.; Michałowski, J.; Mignerey, A. C.; Mülmenstädt, J.; Nouicer, R.; Olszewski, A.; Pak, R.; Park, I. C.; Pernegger, H.; Reed, C.; Remsberg, L. P.; Reuter, M.; Roland, C.; Roland, G.; Rosenberg, L.; Sarin, P.; Sawicki, P.; Skulski, W.; Steadman, S. G.; Steinberg, P.; Stephans, G. S. F.; Stodulski, M.; Sukhanov, A.; Tang, J. L.; Teng, R.; Trzupek, A.; Vale, C.; Nieuwenhuizen, G. J. van; Verdier, R.; Wadsworth, B.; Wolfs, F. L. H.; Wosiek, B. K.; Woźniak, K. W.; Wuosmaa, A. H.; Wysłouch, Bolesław

doi:10.1556/aph.15.2002.3-4.6

Cited by 128 publications

(238 citation statements)

References 6 publications

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“…The latter becomes large for high p ⊥ mo-menta such that the attenuation of 'secondaries' is rather low when employing high p ⊥ cuts. The system Au+Au at √ s = 62.4 GeV has recently been investigated experimentally at RHIC and first results on hadron attenuation have become available at moderate p ⊥ from the PHOBOS Collaboration [46]. We thus start with single hadron attenuation in the next subsection following exactly the studies in Ref.…”

Section: /3mentioning

confidence: 99%

“…In Section 5 we will show the results of calculations for Au+Au collisions at √ s = 62.4 GeV for different centrality classes since this system is presently under investigation experimentally. Apart from a comparison of the high p ⊥ attenuation of charged hadrons with the data from the PHOBOS collaboration [46] we will also present our predictions for the 'near-side' and 'far-side' angular correlations at this energy. Section 6 summarizes our present investigations.…”

Section: Introductionmentioning

confidence: 99%

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Jet quenching by (pre-)hadronic final state interactions at RHIC

Gallmeister

Cassing

2005

Nuclear Physics A

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Within a hadron-string dynamical transport approach (HSD) we investigate the attenuation of high transverse momentum (p ⊥ ) hadrons as well as the suppression of 'near-side' and 'far-side' jets in Au + Au collisions at invariant energies √ s = 200 GeV and √ s = 62.4 GeV in comparison to the data available from the Relativistic Heavy-Ion Collider (RHIC). From our transport studies we find that a significant part of the high p ⊥ hadron attenuation seen experimentally can be attributed to inelastic interactions of 'leading' pre-hadrons with the dense hadronic environment. In addition, we also show results of 'near-side' and 'far-side' angular correlations of high p ⊥ particles from Au+Au collisions at √ s = 200 GeV and √ s = 62.4 GeV within this (pre-)hadronic attenuation scenario. It turns out that the 'near-side' correlations are unaltered -in accordance with experiment -whereas the 'far-side' correlations are suppressed by up to ∼ 60% in central collisions. Since a much larger suppression is observed experimentally for these reactions in central reactions we conclude that there should be strong additional (and earlier) partonic interactions in the dense and possibly colored medium created in Au+Au collisions at RHIC.

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Section: /3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Jet quenching by (pre-)hadronic final state interactions at RHIC

Gallmeister

Cassing

2005

Nuclear Physics A

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“…In studying centrality dependence the focus was put on the calculations of < N part >, its definition and uncertainty. Both the PHENIX [2] and the PHOBOS [11] observations that the charged particle mid-pseudorapidity density per participant pair slightly increases with < N part > could be reproduced fairly well by JPCIAE. However, this study indicated that it is not suitable to use the charged particle mid-pseudorapidity density per participant pair as a function of < N part > to constrain theoretical models for particle production, because < N part > is not a well defined physical variable both experimentally and theoretically.…”

Section: Figmentioning

confidence: 99%

Energy and centrality dependences of charged multiplicity density in relativistic nuclear collisions

Bonasera

Tai

et al. 2002

Physics Letters B

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Using a hadron and string cascade model, JPCIAE, the energy and centrality dependences of charged particle pseudorapidity density in relativistic nuclear collisions were studied. Within the framework of this model, both the relativistic p +p experimental data and the PHOBOS and PHENIX Au + Au data at √ s nn =130 GeV could be reproduced fairly well without retuning the model parameters. The predictions for full RHIC energy Au + Au collisions and for P b + P b collisions at the ALICE energy were given. Participant nucleon distributions were calculated based on different methods. It was found that the number of participant nucleons, < N part >, is not a well defined variable both experimentally and theoretically. Therefore, it is inappropriate to use charged particle pseudorapidity density per participant pair as a function of < N part > for distinguishing various theoretical models.

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“…Figure 2 shows multiplicity distributions in negative rapidity region (−3.9 < η < −3.0) in p+Au, d+Au and 3 He+Au collisions at √ s NN = 200 GeV. Since we employed, for the initial conditions, [13,14]. To see the plots clearly, the result in 3 He+Au (p+Au) collisions is multiplied (divided) by ten in the right figure. PYTHIA in which multiplicities fluctuate in p+p collisions, multiplicity distributions in small colliding systems take over these fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of flow observables in small systems using an integrated dynamical model

2017

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Abstract. We investigate collectivity in small colliding systems by using an integrated dynamical model in which Monte-Carlo initialisation of hydrodynamic fields, the ideal hydrodynamic description of the quark-gluon plasma and the kinetic description of the hadron gas are incorporated. We implement fluctuations of the multiplicity and of the longitudinal matter profile in the initial conditions which are of particular importance in small colliding systems. We also discuss the effects of hadronic rescatterings on flow observables.

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Results from the PHOBOS Experiment at RHIC

Cited by 128 publications

References 6 publications

Jet quenching by (pre-)hadronic final state interactions at RHIC

Jet quenching by (pre-)hadronic final state interactions at RHIC

Energy and centrality dependences of charged multiplicity density in relativistic nuclear collisions

Analysis of flow observables in small systems using an integrated dynamical model

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