Investigating the low-energy K? interactions in nuclear matter with AMADEUS

7th Young Researcher Meeting

Del Grande, R.^1,2 ; Bazzi, M.^1 ; Belloti, G.^3 ; Berucci, C.^4 ; Bragadireanu, A.M.^5 ; Bosnar, D.^6 ; Butt, A.D.^3,7 ; Cargnelli, M.^4 ; Curceanu, C.^1 ; Fabbietti, L.^8,9 ; Fiorini, C.^3,7 ; Ghio, F.^10,11 ; Guaraldo, C.^1 ; Hayano, R.S.^12 ; Iliescu, M.^1 ; Iwasaki, M.^13 ; Levi Sandri, P.^1 ; Marton, J.^4 ; Miliucci, M.^1,2 ; Okada, S.^13 ; Pietreanu, D.^5 ; Piscicchia, K.^1,14 ; Romero Vidal, A.^15 ; Scordo, A.^1 ; Shi, H.^1 ; Sirghi, D.L.^1,5 ; Sirghi, F.^1,5 ; Tucakovic, I.^16 ; Vazquez Doce, O.^8,9 ; Widmann, E.^4 ; Wycech, S.^17 ; Zmeskal, J.^4 ; Mandaglio, G.^18,19 ; Martini, M.^1,20 ; Moskal, P.^21

INFN Laboratori Nazionali di Frascati, Frascati, Rome, Italy^1

Universita degli Studi di Roma Tor Vergata, Rome, Italy^2

Politecnico di Milano, Dip. di Elettronica, Informazione e Bioingegneria, Milano, Italy^3

Stefan-Meyer-Institut für Subatomare Physik, Wien, Austria^4

Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania^5

University of Zagreb, Zagreb, Croatia^6

INFN Sezione di Milano, Milano, Italy^7

Excellence Cluster Origin and Structure of the Universe, Garching, Germany^8

Physik Department E12, Technische Universitat München, Garching, Germany

(10) INFN Sezione di Roma i, Rome, Italy

(11) Istituto Superiore di Sanita, Rome, Italy

(12) The University of Tokyo, Tokyo, Japan

(13) RIKEN, The Institute of Physics and Chemical Research, Saitama, Japan

(14) Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Rome, Italy

(15) University of Santiago de Compostela, Santiago de Compostela, Spain

(16) Ruder Bokovi Institute, Zagreb, Croatia

(17) National Centre for Nuclear Research, Warsaw, Poland

(18) Dipartimento ChiBioFarAm dell'Universita di Messina, Messina, Italy

(19) INFN Gruppo Collegato di Messina, Messina, Italy

(20) Dipartimento di Scienze e Tecnologie Applicate, Universita 'Guglielmo Marconi', Rome, Italy

(21) Institute of Physics, Jagiellonian University, Kracow, Poland^9

关键词: Absorption experiments;    Absorption process;    Correlated production;    Final state interactions;    Nuclear clusters;    Nuclear matters;    Nuclear medium;    Statistical significance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/841/1/012023/pdf
DOI  :  10.1088/1742-6596/841/1/012023

来源: IOP

【 摘 要 】

The AMADEUS collaboration studies low-energy K-interactions with light nuclei in order to clarify some aspects related to the behaviour of hadrons containing strangeness in nuclear medium. One of the main topics is the quest about the possible formation of Kaonic Nuclear Clusters (KNC), which depends on the strength of the anti-kaons interaction with nucleons. In kaonic absorption experiments, the search for KNC is strictly connected with the measurement of the yields of the so-called multi-nucleon absorption processes. In this paper, the study of Σ0p correlated production from K-absorption in12C, using the KLOE 2004-2005 data set, is reported. The yield of the two nucleon absorption (2NA), when the produced Σ0and p particles are free from any final state interaction process, was measured for the first time. The contribution of a ppK-bound state was also tested. The best fit is obtained for a ppK-state with a binding energy of 45 MeV and a width of 30 MeV, but the statistical significance is at the level of 1σ only.