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"First Results from the XENON10 Dark Matter Experiment at the Gran Sasso Laboratory"
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講演者 ： 山下雅樹 氏
（コロンビア大学 Research scientist）
日時 ： 2007/6/15（Fri.）13：00 〜 15：00
場所 ： 素粒子物理国際研究センター会議室（理学部１号館１０階１０１７号室）
Abstract ：
The XENON experiment aims at the direct detection of dark matter
in the form of Weakly Interacting Massive Particles (WIMPs) via their
elastic scattering off Xe nuclei.
A first XENON module (XENON10) with 15 kg fiducial mass have been build
and moved to Laboratori Nazionali del Gran Sass on March 2006.
The TPCs are operated in dual (liquid/gas) phase, to allow a
measurement of nuclear recoils down to 4.5 keV energy, via
simultaneous detection of the ionization, through secondary
scintillation in the gas, and primary scintillation in the liquid. The
distinct ratio of primary to secondary scintillation for nuclear
recoils from WIMPs (or neutrons), and for electron recoils from
background, is used for the event-by-event discrimination.
In this talk, the first result from XENON10 with 58.6 days live
time and also the future plan will be presented.
講演資料 ： [トラペ (PDF file, 17MB)  ]
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