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arXiv 0907.0307hep-ex
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PICASSO对19-F上WIMP相互作用的暗物质自旋依赖极限

Dark Matter Spin-Dependent Limits for WIMP Interactions on 19-F by PICASSO

S. Archambault, F. Aubin, M. Auger, E. Behnke, B. Beltran, K. Clark, X. Dai, A. Davour, J. Farine, R. Faust, M. -H. Genest, G. Giroux, R. Gornea, C. Krauss, S. … 展开作者

S. Archambault, F. Aubin, M. Auger, E. Behnke, B. Beltran, K. Clark, X. Dai, A. Davour, J. Farine, R. Faust, M. -H. Genest, G. Giroux, R. Gornea, C. Krauss, S. Kumaratunga, I. Lawson, C. Leroy, L. Lessard, C. Levy, I. Levine, R. MacDonald, J. -P. Martin, P. Nadeau, A. Noble, M. -C. Piro, S. Pospisil, T. Shepherd, N. Starinski, I. Stekl, C. Storey, U. Wichoski, V. Zacek

摘要:

SNOLAB的PICASSO实验报告了使用过热液滴技术在$^{19}$ F上进行的自旋相关WIMP相互作用的新结果。新一代的探测器和新的功能,使背景歧视通过拒绝非粒子引起的事件进行说明。第一个结果是一个子集的两个探测器与目标质量的$^{19}$ F分别为65克和69克,总曝光量为13.75 $\pm$ 0.48公斤。没有发现暗物质信号,对于质量约为24 GeV/c的WIMP,在$^2$ F上获得了新的自旋相关截面极限,即$σ_F$ = 13.9 pb(90% C. L.)其可分别转换为质子和中子的截面极限为$σ_p$ = 0.16 pb和$σ_n$ = 2.60 pb(90%C.L)。所获得的限制质子限制最近的解释DAMA/天秤座年度调制自旋相关的相互作用。

英文摘要:

The PICASSO experiment at SNOLAB reports new results for spin-dependent WIMP interactions on $^{19}$F using the superheated droplet technique. A new generation of detectors and new features which enable background discrimination via the rejection of non-particle induced events are described. First results are presented for a subset of two detectors with target masses of $^{19}$F of 65 g and 69 g respectively and a total exposure of 13.75 $\pm$ 0.48 kgd. No dark matter signal was found and for WIMP masses around 24 GeV/c$^2$ new limits have been obtained on the spin-dependent cross section on $^{19}$F of $σ_F$ = 13.9 pb (90% C.L.) which can be converted into cross section limits on protons and neutrons of $σ_p$ = 0.16 pb and $σ_n$ = 2.60 pb respectively (90% C.L). The obtained limits on protons restrict recent interpretations of the DAMA/LIBRA annual modulations in terms of spin-dependent interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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