Author/Authors :
GIBS Collaboration، نويسنده , , M.Kh. Anikina، نويسنده , , V.D. Aksinenko، نويسنده , , S.A. Avramenko، نويسنده , , B.P. Bannik، نويسنده , , Yu.A. Belikov، نويسنده , , K. Gajewski، نويسنده , , A.G. Galperin، نويسنده , , N.S. Glagoleva، نويسنده , , A.I. Golokhvastov، نويسنده , , S.A. Khorozov، نويسنده , , V.P. Kondratiev، نويسنده , , E.V. Kozubsky، نويسنده , , L.V. Krasnov، نويسنده , , B.A. Kulakov، نويسنده , , J. Lukstins، نويسنده , , O.Yu. Mandrik، نويسنده , , P.K. Manyakov، نويسنده , , A.T. Matyushin، نويسنده , , V.T. Matyushin، نويسنده , , et al.، نويسنده ,
Abstract :
Using a new method of data processing in the investigation of interference correlations of identical particles, a direct proof of nonstationarity of the π− production volume in central MgMg collisions at a beam momentum of pIab = 4.4 GeV/c per nucleon was obtained. The velocity of a source of correlated π− meson pairs is introduced as a free parameter in the Lorentz transformed approximation formula of the interference peak. This velocity increases with increasing the velocity of a subset of π− mesons which are chosen for the interference analysis. The source velocity is the new experimentally measurable physical variable of interference analysis, apart from space-time sizes of the source.
Keywords :
Interference correlations of ?? mesons , Expansion velocity of pion production volume , Nucleus-nucleus interactions , Streamer chamber
