Bogdanchikov, A.G.
Phenomenology-HEP
MULT2
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Higher Moments of Net-proton Multiplicity Distributions at RHIC

The STAR collaboration Aggarwal, M.M. ; Ahammed, Z. ; Alakhverdyants, A.V. ; et al.
Phys.Rev.Lett. 105 (2010) 022302, 2010.
Inspire Record 853304 DOI 10.17182/hepdata.73344

We report the first measurements of the kurtosis (\kappa), skewness (S) and variance (\sigma^2) of net-proton multiplicity (N_p - N_pbar) distributions at midrapidity for Au+Au collisions at \sqrt(s_NN) = 19.6, 62.4, and 200 GeV corresponding to baryon chemical potentials (\mu_B) between 200 - 20 MeV. Our measurements of the products \kappa \sigma^2 and S \sigma, which can be related to theoretical calculations sensitive to baryon number susceptibilities and long range correlations, are constant as functions of collision centrality. We compare these products with results from lattice QCD and various models without a critical point and study the \sqrt(s_NN) dependence of \kappa \sigma^2. From the measurements at the three beam energies, we find no evidence for a critical point in the QCD phase diagram for \mu_B below 200 MeV.

40 data tables
Table 1

$\Delta N_p$ multiplicity distribution in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV for 0-5 percent central collisions at midrapidity (| y |< 0.5).

Table 2

$\Delta N_p$ multiplicity distribution in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV for 30-40 percent central collisions at midrapidity (| y |< 0.5).

Table 3

$\Delta N_p$ multiplicity distribution in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV for 70-80 percent central collisions at midrapidity (| y |< 0.5).

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Rescattering in neutrino / anti-neutrino deuteron reactions

Tenner, A.G. ; Nikolaev, Nikolai N. ;
Nuovo Cim.A 105 (1992) 1001-1024, 1992.
Inspire Record 318863 DOI 10.17182/hepdata.37840

A study is made of the rescattering phenomenon in deuterons by means of an analysis of ν/xxx;-d interactions in the WA25 (BEBC) experiment at CERN. Experimental data are presented on the rescattering fraction, its energy and multiplicity dependence, on the rapidity spectra of specific particles, on the multiplicity properties of rescatter interactions, and on strange-particle production. Rescattering offers an opportunity to study the behaviour of the produced particlein statu nascendi. The experimental phenomena are discussed in the framework of the formation time formalism. The proper time of hadronization τf is evaluated to be ∼0.5fm/c. A possible reduction of formation time in low-multiplicity events is discussed. Some differences between neutrino and hadron-induced rescattering in deuterons are attributed to the constituent quark structure of pions and nucleons. The experimental results are relevant for the issue of quark-gluon plasma formation in heavy-ion collisions.

18 data tables
Table 1

ODD NUMBER OF HADRONS.

Table 2

ODD NUMBER OF HADRONS.

Table 3

ODD NUMBER OF HADRONS.

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