Inga Kuznetsova

Heavy flavor hadrons in statistical hadronization of strangeness-rich QGP

We study b and c quark hadronization from QGP. We obtain the yields of charm and bottom flavored hadrons within the statistical hadronization model. The important novel feature of this study is that we take into account the high strangeness and entropy content of QGP, conserving the strangeness and entropy yields at hadronization.

Pion and muon production in e − , e + , γ plasma

We study production and equilibration of pions and muons in relativistic electron-positron-photon plasma at a temperature

FROM QUARK-GLUON UNIVERSE TO NEUTRINO DECOUPLING: 200 < T < 2 MeV

T\ll m_\mu, m_\pi

Unstable hadrons in hot hadron gas: In the laboratory and in the early Universe

. We argue that the observation of pions and muons can be a diagnostic tool in the study of the initial properties of such a plasma formed by means of strong laser fields. Conversely, properties of muons and pions in thermal environment become accessible to precise experimental study.

Electron-positron plasma drop formed by ultra-intense laser pulses

The properties of the quark and hadron Universe are explored. Kinetic theory considerations are presented proving that hadron abundances after phase transformation from quarks to hadrons remain intact till abundances of hadrons become irrelevant. The hadronization process and the evolution of hadron yields are described in detail.

Strangeness at the threshold of phase change

We study kinetic master equations for chemical reactions involving the formation and the natural decay of unstable particles in a thermal bath. We consider the decay channel of one into two particles and the inverse process, fusion of two thermal particles into one. We present the master equations for the evolution of the density of the unstable particles in the early Universe. We obtain the thermal invariant reaction rate using as an input the free space (vacuum) decay time and show the medium quantum effects on {pi}+{pi}{r_reversible}{rho} reaction relaxation time. As another laboratory example we describe the K+K{r_reversible}{phi} process in thermal hadronic gas in heavy-ion collisions. A particularly interesting application of our formalism is the {pi}{sup 0{r_reversible}{gamma}}+{gamma} process in the early Universe. We also explore the physics of {pi}{sup {+-}}and {mu}{sup {+-}}freeze-out in the Universe.

Charmed hadrons from strangeness-rich QGP

We study the initial properties and positron annihilation within a small electron-positron plasma drop formed by intense laser pulse. Such QED cascade initiated plasma is, in general, far below the chemical (particle yield) equilibrium. We find that the available electrons and positrons equilibrate kinetically, yet despite relatively high particle density, the electron-positron annihilation is very slow, suggesting a rather long lifespan of the plasma drop.

Enhanced Production of Delta and Sigma(1385) Resonances

LPTHE, Universit´e Paris 7, 2 place Jussieu, F–75251 Cedex 05E-mail: rafelski@physics.arizona.eduAbstract. We explore entropy and strangeness as signature of QGP for top AGS andthe energy scan at SPS. We find that the hadronization dynamics changes between 20and 30 A GeV projectile energy. The high energy results are consistent with QGP.PACS numbers: 24.10.Pa, 25.75.-q, 13.60.Rj, 12.38.Mh

Resonance Production in Heavy Ion Collisions: Suppression of Lambda(1520) and Enhancement of Sigma(1385)

The yields of charmed hadrons emitted by strangeness-rich QGP are evaluated within the chemical non-equilibrium statistical hadronization model, conserving strangeness, charm and entropy yields at hadronization.

Non-equilibrium heavy-flavored hadron yields from chemical equilibrium strangeness-rich QGP

Yields of Delta(1230), Sigma(1385) resonances produced in heavy ion collisions are studied within the framework of a kinetic master equation. The time evolution is driven by the process Delta(1230) \leftrightarrow N \pi, Sigma(1385) \leftrightarrow \Lambda \pi . We obtain resonance yield both below and above chemical equilibrium, depending on initial hadronization condition and separation of kinetic and chemical freeze-out.