Strong absorption of hadrons with hidden and open strangeness in nuclear matter
Abstract
We present the first observation of K- and \phi absorption within nuclear matter by means of \pi- -induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K-/K+)W / (K-/K+)C is found to be 0.319 \pm 0.009(stat)+0.014-0.012 (syst) indicating a larger absorption of K- in heavier targets as compared to lighter ones. The measured \phi/K- ratios in \pi-+C and \pi^- +W reactions within the HADES acceptance are found to be equal to (syst) and to (syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the \phi meson in nuclear medium is strongly coupled to the K- dynamics. The large difference in the \phi production off C and W nuclei is discussed in terms of a strong \phiN in-medium coupling.
Cite
@article{arxiv.1812.03728,
title = {Strong absorption of hadrons with hidden and open strangeness in nuclear matter},
author = {J. Adamczewski-Musch and O. Arnold and E. T. Atomssa and C. Behnke and A. Belounnas and A. Belyaev and J. C. Berger-Chen and J. Biernat and A. Blanco and C. Blume and M. Böhmer and S. Chernenko and L. Chlad and P. Chudoba and I. Ciepal and C. Deveaux and D. Dittert and J. Dreyer and A. Dybczak and E. Epple and L. Fabbietti and O. Fateev and P. Fonte and C. Franco and J. Friese and I. Fröhlich and T. Galatyuk and J. A. Garzon and R. Gernhäuser and M. Golubeva and R. Greifenhagen and F. Guber and M. Gumberidze and S. Harabasz and T. Heinz and T. Hennino and C. Höhne and R. Holzmann and A. Ierusalimov and A. Ivashkin and B. Kämpfer and B. Kardan and I. Koenig and W. Koenig and B. W. Kolb and G. Korcyl and G. Kornakov and F. Kornas and R. Kotte and J. Kubos and A. Kugler and T. Kunz and A. Kurepin and A. Kurilkin and P. Kurilkin and V. Ladygin and R. Lalik and K. Lapidus and A. Lebedev and S. Linev and L. Lopes and M. Lorenz and T. Mahmoud and L. Maier and A. Malige and J. Markert and S. Maurus and V. Metag and J. Michel and D. M. Mihaylov and V. Mikhaylov and S. Morozov and C. Müntz and R. Münzer and L. Naumann and K. Nowakowsk and Y. Parpottas and V. Pechenov and O. Pechenova and O. Petukhov and J. Pietraszko and A. P. Prozorov and W. Przygoda and B. Ramstein and A. Reshetin and P. Rodriguez-Ramos and A. Rost and A. Sadovsky and P. Salabura and T. Scheib and K. Schmidt-Sommerfeld and H. Schuldes and E. Schwab and F. Scozzi and F. Seck and P. Sellheim and J. Siebenson and L. Silva and J. Smyrski and S. Spataro and S. Spies and H. Ströbele and J. Stroth and P. Strzempek and C. Sturm and O. Svoboda and M. Szala and P. Tlusty and M. Traxler and H. Tsertos and C. Ungethüm and O. Vazquez Doce and V. Wagner and C. Wendisch and M. G. Wiebusch and J. Wirth and Y. Zanevsky and P. Zumbruch},
journal= {arXiv preprint arXiv:1812.03728},
year = {2019}
}
Comments
6 pages, 3 figures