Search for η-mesic Helium with the WASA-at-COSY detector

被引：1

作者：

Krzemien, Wojciech ^{[1
]}

Moskal, Pawel ^{[1
]}

Smyrski, Jerzy ^{[1
]}

Skurzok, Magdalena ^{[1
]}

机构：

[1] Jagiellonian Univ, Inst Phys, Krakow, Poland

来源：

MESON 2012 - 12TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS | 2012年 / 37卷

关键词：

NUCLEI; PHOTOPRODUCTION; MESONS;

D O I：

10.1051/epjconf/20123702003

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A search for the He-4 - eta bound state via exclusive measurement of the excitation function for the dd -> He-3 p pi(-) reaction, was performed at the Cooler Synchrotron COSY-Julich with the WASA-at-COSY detection system. The data were taken during a slow acceleration of the beam from 2.185 GeV/c to 2.400 GeV/c crossing the kinematic threshold for the eta production in the dd -> He-4 eta reaction at 2.336 GeV/c. The corresponding excess energy in the He-4 - eta system varied from -51.4 MeV to 22 MeV. The shape of the excitation function for the dd -> (3)Hep pi(-) was examined. No signal of the He-4 - eta bound state was observed in the excitation function.

引用

页数：4

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