pp and pi pi intensity interferometry in collisions of Ar+KCl at 1.76A GeV

0365543 - ÚJF 2012 RIV DE eng J - Journal Article
Agakishiev, G. - Balanda, A. - Bannier, B. - Bassini, R. - Křížek, Filip - Kugler, Andrej - Sobolev, Y.G. - Tlustý, Pavel - Wagner, Vladimír … Total 110 authors
pp and pi pi intensity interferometry in collisions of Ar+KCl at 1.76A GeV.
European Physical Journal A. Roč. 47, č. 5 (2011), 63/1-63/7. ISSN 1434-6001. E-ISSN 1434-601X
R&D Projects: GA MŠMT LC07050
Institutional research plan: CEZ:AV0Z10480505
Keywords : HEAVY-ION COLLISIONS * RELATIVISTIC NUCLEAR COLLISIONS * INTERMEDIATE-MASS FRAGMENTS
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 2.190, year: 2011

Results on pp, pi(+) pi(+), and pi-pi-intensity interferometry are reported for collisions of Ar+KCl at 1.76A GeV beam energy, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. The experimental correlation functions as a function of the relative momentum are compared to model calculations allowing the determination of the space-time extent of the corresponding emission sources. The pp source radii are found significantly larger than the pp emission radius. The present radii do well complement the beam-energy dependences of Gaussian source radii of the collision system of size A + A similar or equal to 40 + 40. The pp source radius at fixed beam energy is found to increase linearly with the cube root of the number of participants. From this trend, a lower limit of the pp correlation radius is deduced.
Permanent Link: http://hdl.handle.net/11104/0200765