Centrality dependent particle production at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>y</mml:mi><mml:mo>=</mml:mo><mml:mn>0</mml:mn></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>y</mml:mi><mml:mo>~</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math>in Au+Au collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:msub><mml:mi>

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

doi:10.1103/physrevc.72.014908

Cited by 80 publications

(31 citation statements)

References 53 publications

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“…The ratio K/π at mid-rapidity [21] is only weakly centrality dependent and coincides with the RHIC measurement [24] at the same particle density. The p/π ratio is centrality independent and agrees very well with PHENIX [23] and BRAHMS [26] measurements at RHIC, but all these results are lower than the STAR value [24], which is not corrected for feed-down protons from strange-baryon decays and thus not directly comparable. The thermal hadronization model predicts [27] the K/π ratio within 6%, but gives a p/π ratio more than 50% higher.…”

Section: Identified-particle Productionsupporting

confidence: 73%

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Šafařı́k¹

2012

Acta Phys. Pol. B

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Section: Identified-particle Productionsupporting

confidence: 73%

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Šafařı́k¹

2012

Acta Phys. Pol. B

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“…However, the horn structure [2] observed in central Pb+Pb collisions is reduced to a step. Data obtained beyond the SPS energy range, namely at RHIC and LHC [3][4][5][6][7], continue the trend seen at the SPS. The inverse slope parameters T for π, K and p of the spectra of transverse mass m T = p 2 T + m 2 were fitted in inelastic p+p reactions.…”

Section: Particle Ratios In Inelastic P+p Collisions and Inverse Slopsupporting

confidence: 60%

Recent results from the strong interactions program of NA61/SHINE

Puławski

2017

EPJ Web Conf.

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Abstract. The NA61/SHINE experiment studies hadron production in hadron+hadron, hadron+nucleus and nucleus+nucleus collisions. The strong interactions program has two main purposes: study the properties of the onset of deconfinement and search for the signatures of the critical point of strongly interacting matter. This aim is pursued by performing a two-dimensional scan of the phase diagram by varying the energy/momentum (13A-158A GeV/c) and the system size (p+p, Be+Be, Ar+Sc, Xe+La) of the collisions. This publication reviews recent results from p+p, Be+Be and Ar+Sc interactions. Measured particle spectra are discussed and compared to NA49 results from Pb+Pb collisions. The results illustrate the progress towards scanning the phase diagram of strongly interacting matter. The NA61/SHINE facilityThe layout of the NA61/SHINE detector [1] is presented in Fig. 1. It consists of a large acceptance hadron spectrometer with excellent capabilities in charged particle momentum measurements and identification by a set of five Time Projection Chambers as well as Time-of-Flight detectors. The high resolution forward calorimeter, the Projectile Spectator Detector, measures energy flow around the beam direction, which in nucleus-nucleus reactions is primarily a measure of the number of spectator (non-interacted) nucleons and is thus related to the centrality of the collision. An array of beam detectors identifies beam particles and measures precisely their trajectories. Primary and secondary hadron as well as ion beams are used by the experiment. Particle ratios in inelastic p+p collisions and inverse slope parameter TThe excellent particle identification based on the Time-off-Flight (ToF) and energy loss (dE/dx) measurements allows to calculate the ratio of yields K + /π + . The energy dependence of the K + /π + ratio at midrapidity for inelastic p+p interactions and central Pb+Pb/Au+Au collisions is presented in Fig. 2 (left). The NA61/SHINE data suggest that even in inelastic p+p interactions the energy dependence of the K + /π + ratio exhibits rapid changes in the SPS energy range. However, the horn structure [2] observed in central Pb+Pb collisions is reduced to a step. Data obtained beyond the SPS energy range, namely at RHIC and LHC [3][4][5][6][7], continue the trend seen at the SPS. a e-mail: s.pulawski@cern.ch On behalf of the NA61/Shine Collaboration

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“…Only in the case of 5% C + Au reactions at top SPS and top RHIC energies have some differences been found, which will be discussed in the following. [124,125], PHENIX [126] and STAR [127] Collaborations.…”

Section: Asymmetric Systemsmentioning

confidence: 99%

Exploring the partonic phase at finite chemical potential within an extended off-shell transport approach

et al. 2019

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We extend the parton-hadron-string dynamics (PHSD) transport approach in the partonic sector by explicitly calculating the total and differential partonic scattering cross sections as a function of temperature T and baryon chemical potential µB on the basis of the effective propagators and couplings from the dynamical quasiparticle model (DQPM) that is matched to reproduce the equation of state of the partonic system above the deconfinement temperature Tc from lattice QCD. We calculate the collisional widths for the partonic degrees of freedom at finite T and µB in the timelike sector and conclude that the quasiparticle limit holds sufficiently well. Furthermore, the ratio of shear viscosity η over entropy density s, i.e., η/s, is evaluated using the collisional widths and compared to lattice QCD calculations for µB = 0 as well. We find that the novel ratio η/s does not differ very much from that calculated within the original DQPM on the basis of the Kubo formalism. Furthermore, there is only a very modest change of η/s with the baryon chemical µB as a function of the scaled temperature T /Tc(µB). This also holds for a variety of hadronic observables from central A + A collisions in the energy range 5 GeV ≤ √ sNN ≤ 200 GeV when implementing the differential cross sections into the PHSD approach. We only observe small differences in the antibaryon sector (p,Λ +Σ 0 ) at √ sNN = 17.3 GeV and 200 GeV with practically no sensitivity of rapidity and pT distributions to the µB dependence of the partonic cross sections. Small variations in the strangeness sector are obtained in all collisional systems studied (A + A and C + Au); however, it will be very hard to extract a robust signal experimentally. Since we find only small traces of a µB dependence in heavy-ion observables -although the effective partonic masses and widths as well as their partonic cross sections clearly depend on µB -this implies that one needs a sizable partonic density and large space-time QGP volume to explore the dynamics in the partonic phase. These conditions are only fulfilled at high bombarding energies where µB is, however, rather low. On the other hand, when decreasing the bombarding energy and thus increasing µB, the hadronic phase becomes dominant and accordingly it will be difficult to extract signals from the partonic dynamics based on "bulk" observables.

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Centrality dependent particle production aty=0andy~1in Au+Au collisions at

Cited by 80 publications

References 53 publications

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Recent results from the strong interactions program of NA61/SHINE

Exploring the partonic phase at finite chemical potential within an extended off-shell transport approach

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