Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e−+e+, e±+p, p(
          
            
              
                p
                ¯
              
            
          
        )+p, p+A and A+A(B) Collisions

Lacey, R.; Liu, Peifeng; Magdy, N.; Csanád, M.; Schweid, B. R.; Ajitanand, N. N.; Alexander, J.; Pak, R.

doi:10.3390/universe4010022

Cited by 34 publications

(44 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The wounded quark scaling also works for the SPS energy range [15]. More recent studies were reported in [16][17][18][19].Our results for particle production at midrapidity are shown in Fig. 1.…”

supporting

confidence: 62%

See 1 more Smart Citation

On wounded constituents in nuclear collisions

Božek¹,

Broniowski²,

Rybczyński³

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. In this talk we summarize the main results of our recent paper [1], where we explore predictions of the wounded quark model for particle production and the properties of the initial state formed in ultra-relativistic collisions of atomic nuclei.Particle-particle interactions at high energies usually lead to copious production of new particles whose number rises as a function of the collision energy. The charged particle multiplicity (N ch ) and its pseudorapidity density (dN ch /dη) are fundamental measurable quantities which serve as important characteristics of the global properties of the system. The data on production of particles in relativistic collisions of atomic nuclei collected during the operation of RHIC [2,3] and the LHC [4] accelerators indicate that the standard wounded nucleon model [5] (according to the definition, a wounded nucleon is the one which underwent at least one inelastic collision) does not describe the observed centrality dependence of particle multiplicities in the A+A collisions, unless a component proportional to the binary collisions [6] is added.We are interested in the impact of subnucleonic components of matter on the dynamics of the of the early stage of the collisions, and explore th wounded quark model [10][11][12][13]. One of the interesting results of [1] is that taking into account subnucleonic degrees of freedom in the description of the early phase of the collision one obtains the linear dependence of production of particles as a function of the number of wounded constituents, namelywhere Q W is the number of wounded constituents involved in the collision. Such scaling has been suggested in [14] for the RHIC data. The wounded quark scaling also works for the SPS energy range [15]. More recent studies were reported in [16][17][18][19].Our results for particle production at midrapidity are shown in Fig. 1. We note an approximately flat centrality dependence of dN ch /dη/Q W in qualitative agreement with the earlier studies [8,14,15,20]. In contrast, the flatness is not the case in the wounded nucleon model, where, as is well known, the ratio dN ch /dη/N W substantially increases with the number of wounded nucleons, N W . The value of dN ch /dη/Q W (i.e., the average number of charged hadrons per unit of rapidity coming from a single Presented by M. Rybczyński a

show abstract

supporting

confidence: 62%

“…The wounded quark scaling also works for the SPS energy range [15]. More recent studies were reported in [16][17][18][19].…”

mentioning

confidence: 99%

On wounded constituents in nuclear collisions

Božek¹,

Broniowski²,

Rybczyński³

2017

EPJ Web Conf.

View full text Add to dashboard Cite

show abstract

“…In this model, the initial sources are the wounded quarks, moving forward or backward, according to the motion of their parent nucleons from nuclei A and B. An advantage of using the wounded quarks compared to wounded nucleons [70] is that one obtains proper scaling [13,[87][88][89][90][91] of the multiplicities on the number of participants with no need for the binary-collision component [71]. The event-byevent distribution of wounded quarks in the transverse plane is obtained from the Glauber simulations with GLISSANDO [92,93], corresponding the transverse location of the wounded quarks.…”

Section: Modeling Initial Correlationsmentioning

confidence: 99%

Partial correlation analysis method in ultrarelativistic heavy-ion collisions

Olszewski

Broniowski

2017

Phys. Rev. C

View full text Add to dashboard Cite

We argue that statistical data analysis of two-particle longitudinal correlations in ultra-relativistic heavy-ion collisions may be efficiently carried out with the technique of partial covariance. In this method, the spurious event-by-event fluctuations due to imprecise centrality determination are eliminated via projecting out the component of the covariance influenced by the centrality fluctuations. We bring up the relationship of the partial covariance to the conditional covariance. Importantly, in the superposition approach, where hadrons are produced independently from a collection of sources, the framework allows us to impose centrality constraints on the number of sources rather than hadrons, that way unfolding of the trivial fluctuations from statistical hadronization and focusing better on the initial-state physics. We show, using simulated data from hydrodynamics followed with statistical hadronization, that the technique is practical and very simple to use, giving insight into the correlations generated in the initial stage. We also discuss the issues related to separation of the short-and long-range components of the correlation functions, and show that in our example the short-range component from the resonance decays is largely reduced by considering pions of the same sign. We demonstrate the method explicitly on the cases where centrality is determined with a single central control bin, or with two peripheral control bins.PACS numbers: 25.75Gz, 25.75.Ld

show abstract

“…8. The second observation is that the same parameters: T cep ∼ 165MeV and µ cep B ∼ 95MeV will work for recent STAR measurements of the excitation function for the moment products S σ and κσ 2 of the event-by-event net-proton multiplicity distributions [41]. The data for 7 centrality bins will also collapse onto a single curve in the FSS scaled variables.…”

Section: Search For the Qcd Critical End Pointmentioning

confidence: 99%

“…The data for 7 centrality bins will also collapse onto a single curve in the FSS scaled variables. The change in parameter of µ cep B from 95 MeV to 205 MeV will break the scaling for S σ and κσ 2 [41].…”

Section: Search For the Qcd Critical End Pointmentioning

confidence: 99%