Correlations and fluctuations in multiparticle production

Dremin, I.

doi:10.3367/ufnr.0160.199008c.0105

Cited by 7 publications

(2 citation statements)

References 39 publications

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“…Nevertheless some events having a "ring structure" were observed in cosmic rays [93], and for larger statistics the processing of the experimental data of the NA22 experiment gave indication [94] on a statistically significant contribution of such events. They show up as peaks in the pion distributions at the rapidities |y| ∼ 0.3 in the center of mass frame.…”

Section: Collective Effects In Qcd Jetsmentioning

confidence: 99%

Theoretical search for collective effects in multiparticle production

Dremin¹,

Leonidov²

1995

Phys.-Usp.

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An absolutely stabilized laser diode system for high-resolution spectroscopy of the 4 2 S 1=2 -3 2 D 5=2 electric-quadrupole-allowed transition in calcium ions at 729 nm is developed. Both its short-term and long-term stabilities are examined. A system for laser cooling of single calcium ions using an ultraviolet laser diode for excitation of the 4 2 S 1=2 -4 2 P 1=2 transition is also constructed, and by using it we have observed quantum jumps of single calcium ions with a high stability and a high signal-tobackground ratio.

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Section: Collective Effects In Qcd Jetsmentioning

confidence: 99%

Theoretical search for collective effects in multiparticle production

Dremin¹,

Leonidov²

1995

Phys.-Usp.

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“…But considering moderate n >> n we can not be sure that the final state is equilibrium. Investigation of fractal dimensions in the multiparticle hadron processes at high energies shows presence of considerable fluctuations [6]. This leads to necessity to have the theory of dissipation processes with nonequilibrium final state.…”

Section: Introductionmentioning

confidence: 99%

Wigner functions of essentially nonequilibrium systems

Manjavidze¹

1999

Phys. Part. Nucl.

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The aim of the article is to discuss the S-matrix interpretation of perturbation theory for the Wigner functions generating functional at a finite temperature. For sake of definiteness, fruitful from pedagogical point of view, the concrete problem from particle physics of high-temperature initial states dissipation into cold one is considered from experimental and theoretical points of view. The temperature is introduced in the theory by typical for the microcanonical description way. The perturbation theory contains two-temperature (of initial and final states) Green functions. Two possible boundary conditions are considered. One of them is usual in a field theory vacuum boundary condition. Corresponding generating functional of Wigner functions can be used in the particle physics. Another type of the boundary condition assumes that the system under consideration is in environment of the black-body radiation. This leads to the usual in statistics Kubo-Martin-Schwinger boundary condition at the equilibrium (one-temperature) limit. The comparison of the S-matrix approach with Schwinger-Keldysh real-time finite-temperature field theory and with nonstationary statistical operator approach of Zubarev are considered. The range of applicability of the finite-temperature description of dissipation processes is shown.

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