Two-proton correlation function for the pp pp + and pp pp + pions reactions

P Klaja (1, 2, 3) , P Moskal (2) , E Czerwiski (2, 3) , R Czyżykiewicz (3) , A Deloff (4) , D Gil (3) , D Grzonka (2) , L Jarczyk (3) , B Kamys (3) , A Khoukaz (5) , J Klaja (2, 3) , W Krzemień (2, 3) , W Oelert (2) , J Ritman (2) , T Sefzick (2) , M Siemaszko (6) , M Silarski (3) , J Smyrski (3) , A Täschner (7) , M Wolke (2) , J Zdebik (3) , M Zieliński (2, 3) , W Zipper (6)

1 Physikalisches Institut [Erlangen]
2 Institut für Kernphysik
3 MSIP - Marian Smoluchowski Institute of Physics
4 The Andrzej Soltan Institute for Nuclear Studies
5 Institut für Kernphysik
6 Institute of Physics
7 Institut für Kernphysik

For the very first time, the correlation femtoscopy method is applied to a kinematically complete measurement of meson production in the collisions of hadrons. A two-proton correlation function was derived from the data for the pp → ppX reaction, measured near the threshold of η meson production. A technique developed for the purpose of this analysis permitted to establish the correlation function separately for the production of the pp + η and of the pp + pions systems. The shape of the two-proton correlation function for the ppη differs from that for the pp(pions) and both do not show a peak structure opposite to results determined for inclusive measurements of heavy ion collisions.

Mots clés: 13.60.Hb; 13.60.Le; 13.75.-n; 25.40.Ve

P Klaja, P Moskal, E Czerwiski, R Czyżykiewicz, A Deloff, et al.. Two-proton correlation function for the pp pp + and pp pp + pions reactions. Journal of Physics G: Nuclear and Particle Physics, 2010, 37 (5), pp.55003. ⟨10.1088/0954-3899/37/5/055003⟩. ⟨hal-00600793⟩