K0s-K0s correlations in pp collisions at sqrt{s}=7 TeV from the LHC ALICE experiment

B. Abelev , N. Arbor (1) , G. Conesa Balbastre (1) , J. Faivre (1) , C. Furget (1) , R. Guernane (1) , S. Kox (1) , J.S. Real (1) , C. Silvestre (1) , R. Vernet (2) , I. Belikov (3) , B. Hippolyte (3) , C. Kuhn (3) , C. Roy (3) , X. Sanchez Castro (3) , S. Senyukov (3) , Laurent Aphecetche (4) , Guillaume Batigne (4) , E. Bergognon (4) , M. Bregant (4) , H. Delagrange (4) , O. Driga (4) , Magali Estienne (4) , Marie Germain (4) , A. Lardeux (4) , F. Lefèvre (4) , M. Lenhardt (4) , L. Luquin (4) , Gines Martinez Garcia (4) , A. Mas (4) , L. Massacrier (4, 5) , A. Matyja (4) , Philippe Pillot (4) , Y. Schutz (4) , Alexandre Shabetai (4) , Diego Stocco (4) , Sang Un Ahn (6) , Y.W. Baek (6) , A. Baldit (6) , V. Barret (6) , N. Bastid (6) , P. Crochet (6) , P. Dupieux (6) , R. Ichou (6) , X. Lopez (6) , F. Manso (6) , M. Marchisone (6) , S. Porteboeuf-Houssais (6) , P. Rosnet (6) , B. Vulpescu (6) , X. Zhang (6) , C. Cheshkov (5) , B. Cheynis (5) , L. Ducroux (5) , J.-Y. Grossiord (5) , Maxime Guilbaud (5) , R. Tieulent (5) , A. Uras (5) , Y. Zoccarato (5) , J. Castillo Castellanos (7) , J.L. Charvet (7) , C. Geuna (7) , S. Pal (7) , H. Pereira da Costa (7) , A. Rakotozafindrabe (7) , H. Yang (7) , B. Espagnon (8) , L. Valencio Palomo (8)

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 CC-IN2P3 - Centre de Calcul de l'IN2P3
3 DRS-IPHC - Département Recherches Subatomiques
4 SUBATECH - Laboratoire SUBATECH Nantes
5 IPNL - Institut de Physique Nucléaire de Lyon
6 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
7 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
8 IPNO - Institut de Physique Nucléaire d'Orsay

Identical neutral kaon pair correlations are measured in sqrt{s}=7 TeV pp collisions in the ALICE experiment. One-dimensional K0s-K0s correlation functions in terms of the invariant momentum difference of kaon pairs are formed in two multiplicity and two transverse momentum ranges. The femtoscopic parameters for the radius and correlation strength of the kaon source are extracted. The fit includes quantum statistics and final-state interactions of the a0/f0 resonance. K0s-K0s correlations show an increase in radius for increasing multiplicity and a slight decrease in radius for increasing transverse mass, mT, as seen in pion-pion correlations in the pp system and in heavy-ion collisions. Transverse mass scaling is observed between the K0s-K0s and pion-pion radii. Also, the first observation is made of the decay of the f2'(1525) meson into the K0s-K0s channel in pp collisions.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique Nucléaire Expérimentale [nucl-ex]

B. Abelev, N. Arbor, G. Conesa Balbastre, J. Faivre, C. Furget, et al.. K0s-K0s correlations in pp collisions at sqrt{s}=7 TeV from the LHC ALICE experiment. Physics Letters B, 2012, 717, pp.151-161. ⟨10.1016/j.physletb.2012.09.013⟩. ⟨in2p3-00707149⟩