Nuclear modification factor for charged pions and protons at forward rapidity in central Au+Au collisions at 200 GeV

Arsene, I. C.; Bearden, I. G.; Beavis, D.; Beşliu, C.; Budick, B.; Bøggild, H.; Chasman, C.; Christensen, C. H.; Christiansen, P.; Debbe, R.; Enger, E.; Gaardhøje, J. J.; Germinario, M.; Hagel, K.; Holm, Anders; Ito, H.; Jipa, A.; Jundt, F.; Jørdre, J. I.; Jorde, JI; Jørgensen, C. E.; Karabowicz, R.; Kim, EunJu; Kozik, T.; Larsen, T. M.; Lee, Jeonghun; Lee, Yung K.; Lindal, S.; Lystad, G; Lystad, R.; Løvhøiden, G.; Majka, Z.; Makeev, A.; Mikelsen, M.; Murray, M.; Natowitz, J. B.; Nielsen, B. S.; Ouerdane, D.; Płaneta, R.; Rami, F.; Ristea, C.; Ristea, O.; Röhrich, D.; Rhrich, D; Samset, B. H.; Sandberg, D.; Sanders, S.; Staszel, P.; Tveter, Trine Spedstad; Videbæk, F.; Wada, Ryoichi; Yang, H.; Yin, Z.; Zgură, I. S.

doi:10.1016/j.physletb.2007.05.017

Cited by 13 publications

(8 citation statements)

References 54 publications

(25 reference statements)

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“…Interestingly the suppression is stronger at forward rapidities where one would expect parton energy loss to be less. This is consistent with the pattern seen for π − mesons in Au+Au collisions [38].…”

Section: A Particle Spectrasupporting

confidence: 91%

See 1 more Smart Citation

Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions atsNN=200GeV

Arsene¹,

Bearden²,

Beavis³

et al. 2016

Phys. Rev. C

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The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at √ s N N = 200 GeV. As the collisions become more central the collective radial flow increases while the temperature of kinetic freeze-out decreases. The temperature is lower and the radial flow weaker at forward rapidity. Pion and kaon yields with transverse momenta between 1.5 and 2.5 GeV/c are suppressed for central collisions relative to scaled p + p collisions. This suppression, which increases as the collisions become more central is consistent with jet quenching models and is also present with comparable magnitude at forward rapidity. At such rapidities, initial state effects may also be present and persistence of the meson suppression to high rapidity may reflect a combination of jet quenching and nuclearshadowing. The ratio of protons to mesons increases as the collisions become more central and is largest at forward rapidities.

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Section: A Particle Spectrasupporting

confidence: 91%

“…PHENIX has suggested that a similar effect may explain why at high p T R AA is almost the same at √ s N N = 63 and 200 GeV [42]. It is also possible that at forward rapidity initial state effects such as nuclear shadowing are reducing particle production, [37,38].…”

Section: A Particle Spectramentioning

confidence: 95%

Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions atsNN=200GeV

Arsene¹,

Bearden²,

Beavis³

et al. 2016

Phys. Rev. C

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“…Recently, the nuclear modification factor (NMF) has been extensively investigated for different particles at various collision energies in relativistic heavy-ion collisions (HIC) [1][2][3][4]. These studies indicate that the NMF, which can be represented either by the modification factor between nucleus-nucleus (AA) collisions and protonproton (pp) collision R AA or the one between the central collisions and peripheral collisions R CP , is very useful for the study of the quantitative properties of the nuclear medium response when the high speed jet transverses it.…”

Section: Introductionmentioning

confidence: 99%

Nuclear modification factor in intermediate-energy heavy-ion collisions

Zhang

et al. 2014

Physics Letters B

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The transverse momentum dependent nuclear modification factors (NMF), namely $R_{CP}$, is investigated for protons produced in Au + Au at 1$A$ GeV within the framework of the isospin-dependent quantum molecular dynamics (IQMD) model. It is found that the radial collective motion during the expansion stage affects the NMF at low transverse momentum a lot. By fitting the transverse mass spectra of protons with the distribution function from the Blast-Wave model, the magnitude of radial flow can be extracted. After removing the contribution from radial flow, the $R_{CP}$ can be regarded as a thermal one and is found to keep unitary at transverse momentum lower than 0.6 GeV/c and enhance at higher transverse momentum, which can be attributed to Cronin effect.Comment: 8 pages, 5 figures; aceepted by Physics Letters

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“…To study nuclear medium effect in Au+Au collisions, it is convenient to introduce a ratio R cp of the particle yield in central collisions to that in peripheral collisions [16,40]. Both yields are normalized by corresponding nucleon-nucleon binary collision numbers N coll (binary scaling),…”

Section: Nuclear Modification Factor Rcp Of Protons and Pionsmentioning

confidence: 99%

“…The nuclear modification factor (NMF) has been extensively studied in relativistic heavy ion collisions in recent years [16][17][18][19][20][21]. In these studies, unanimous results have demonstrated that the NMF is suppressed at high p T owing to partonic energy loss effect.…”

Section: Introductionmentioning

confidence: 99%

Medium effect on the nuclear modification factor of protons and pions in intermediate-energy heavy ion collisions

Chen

et al. 2017

Phys. Rev. C

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Nuclear modification factor (Rcp) of protons and pions are investigated by simulating Au + Au collisions from 0.8 to 1.8A GeV in a framework of an isospin-dependent quantum molecular dynamics (IQMD) model. Rcp of protons rises with the increase of pT at different beam energies owing to radial flow and Cronin effect. The rate of increase of Rcp is suppressed at higher beam energies. The significant difference of Rcp between protons and pions indicates different medium effects between protons and pions. By changing the in-medium nucleon-nucleon cross section, the Rcp of protons changes a lot, while the Rcp of pions does not. Taking the pion absorption into account, the Rcp of pions becomes close to unity without pT dependence after deactivating the reaction πN → ∆, while there is nearly no change on proton. This suggests that the pion absorption plays a dominant role on pion dynamics and have slight effect for proton dynamics.

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Nuclear modification factor for charged pions and protons at forward rapidity in central Au+Au collisions at 200 GeV

Cited by 13 publications

References 54 publications

Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions atsNN=200GeV

Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions atsNN=200GeV

Nuclear modification factor in intermediate-energy heavy-ion collisions

Medium effect on the nuclear modification factor of protons and pions in intermediate-energy heavy ion collisions

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