Detail Spin-Dependent WIMP Limits from a Bubble Chamber   Oleh:  Behnke, E. ; Collar, J.I. ; Cooper, P.S. ; Crum, K. ; Crisler, M. ; and Others Jenis: Article from Bulletin/Magazine Dalam koleksi: SCIENCE (keterangan: ada di Proquest) vol. 319 no. 5865 (Feb. 2008), page 933. Ketersediaan Perpustakaan FK Nomor Panggil: S01.K.2008.02 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel Bubble chambers were the dominant technology used for particle detection in accelerator experiments for several decades, eventually falling into disuse with the advent of other techniques. We report here on a new application for these devices. We operated an ultraclean, room-temperature bubble chamber containing 1.5 kilograms of superheated CF3I, a target maximally sensitive to spin-dependent and -independent weakly interacting massive particle (WIMP) couplings. An extreme intrinsic insensitivity to the backgrounds that commonly limit direct searches for dark matter was measured in this device under operating conditions leading to the detection of low-energy nuclear recoils like those expected from WIMPs. Improved limits on the spin-dependent WIMP-proton scattering cross section were extracted during our experiments, excluding this type of coupling as a possible explanation for a recent claim of particle dark-matter detection. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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