Measurement of K*(892)0 and K0 mesons in Al+Al collisions at 1.9A GeV

Xavier Bernard Lopez,Norbert Herrmann,Karol Piasecki,Anton Andronic,Valerie Barret,Z. Basrak,Nicole Bastid,M. L. Benabderrahmane,P. Buehler,Michael Cargnelli,Roman Čaplar,Philippe Crochet,Pascal Dupieux,Mile Dželalija,Laura Fabbietti,Izabela M. Fijał-Kirejczyk,Zoltán Fodor,Piotr Jan Gasik,I. Gašparić,Yu L. Grishkin,Ola N. Hartmann,Klaus D. Hildenbrand,Byungsik Hong,TaeIm Kang,J. Kecskeméti,Marek K. Kirejczyk,Youngjin Kim,Mladen Kiš,Piotr Koczoń,Milorad Korolija,Roland Kotte,Andrey A. Lebedev,Yvonne Leifels,Vladislav I. Manko,Johann Marton,Tomasz Matulewicz,Markus Merschmeyer,Waldemar Neubert,D. Pelte,Mihai Petrovici,Fouad Rami,Willibrord N. Reisdorf,Min Sang Ryu,P. Schmidt,Andreas Schüttauf,Zoltán Seres,Brunon R. Sikora,Kwangsouk Sim,Viorica Simion,Krystyna Siwek-Wilczyńska,V. T. Smolyankin,Kazutoshi Suzuki,Z. Tymiński,Peter David Wágner,Eberhard Widmann,Krzysztof Wiśniewski,Zhigang Xiao,Igor E. Yushmanov,Xueying Zhang,A. V. Zhilin,Johann Zmeskal,Paul Kienle,Toshimitsu Yamazaki

PHYSICAL REVIEW C（2010）

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摘要

A new measurement of subthreshold K*(892)(0) and K-0 production is presented. The experimental data complete the measurement of strange particles produced in Al + Al collisions at 1.9A GeV measured with the FOPI detector at SIS at GSI (Darmstadt). The K*(892)(0)/K-0 yield ratio is found to be 0.0315 +/- 0.006(stat.) +/- 0.012(syst.) and is in good agreement with the transport model prediction. These measurements provide information on the in-medium cross section of K+-pi(-) fusion, which is the dominant process in subthreshold K*(892)(0) production.

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