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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Hadron Structure and Spectroscopy 7
HK 37.2: Vortrag
Dienstag, 24. März 2015, 17:30–17:45, T/SR19
Search for η′-nucleus bound states by missing mass spectroscopy∗,∗∗ — •Stefan Friedrich1 and Yoshiki Tanaka2 for the EtaPrime collaboration — 1II. Physikalisches Institut, Justus-Liebig-Universität Gießen — 2University of Tokyo
In a search for η′-nucleus bound states an inclusive measurement of the 12C(p,d) reaction was performed using the fragment separator FRS at GSI as a spectrometer, as proposed in [1,2]. A proton beam of 2.5 GeV, delivered by SIS 18, was used to potentially populate η′-mesic states in 11C. The missing mass of the reaction was measured by analyzing the momentum of the ejectile deuterons by particle tracking with two multi-wire drift chambers in the dispersive focal plane. An excitation energy range in 11C of -100 MeV to +50 MeV near the η′ production threshold was covered in several Bρ settings of the FRS. Particle identification was achieved by time-of-flight measurements and Cherenkov detectors. Momentum calibration was provided by backward elastic scattering in the D(p,d)p reaction. Background processes such as multi-pion production were studied in the D(p,d) reaction. The current status of the data analysis will be presented.
H. Nagahiro et al., Phys. Rev. C 87 (2013), 045201
K. Itahashi et al., Prog. Theo. Phys. 128 (2012), 601
∗Funded by Grant-in-Aid for Young Scientists (A) (No. 25707018) from JSPS
∗∗Experiment performed in the framework of the Super-FRS collaboration for FAIR