Optimizing EDELWEISS detectors for low-mass WIMP searches
Optimizing EDELWEISS detectors for low-mass WIMP searches
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DOI：
10.1103/physrevd.97.022003
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发表时间：
2017-07
影响因子：
5
通讯作者：
Q. Arnaud;E. Armengaud;C. Augier;A. Benoȋt;L. Berg'e;J. Billard;A. Broniatowski;P. Camus;A. Cazes;M. Chapellier;F. Charlieux;M. D. J'esus;L. Dumoulin;K. Eitel;N. Foerster;J. Gascon;A. Giuliani;M. Gros;L. Hehn;Yong Jin;A. Juillard;M. Kleifges;V. Kozlov;H. Kraus;V. Kudryavtsev;H. Le-Sueur;R. Maisonobe;S. Marnieros;X. Navick;C. Nones;E. Olivieri;P. Pari;B. Paul;D. Poda;E. Queguiner;S. Rozov;V. Sanglard;S. Scorza;B. Siebenborn;L. Vagneron;M. Weber;E. Yakushev
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文献类型：
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作者：
Q. Arnaud;E. Armengaud;C. Augier;A. Benoȋt;L. Berg'e;J. Billard;A. Broniatowski;P. Camus;A. Cazes;M. Chapellier;F. Charlieux;M. D. J'esus;L. Dumoulin;K. Eitel;N. Foerster;J. Gascon;A. Giuliani;M. Gros;L. Hehn;Yong Jin;A. Juillard;M. Kleifges;V. Kozlov;H. Kraus;V. Kudryavtsev;H. Le-Sueur;R. Maisonobe;S. Marnieros;X. Navick;C. Nones;E. Olivieri;P. Pari;B. Paul;D. Poda;E. Queguiner;S. Rozov;V. Sanglard;S. Scorza;B. Siebenborn;L. Vagneron;M. Weber;E. Yakushev
研究了雪绒花探测器探测低质量弱相互作用大质量粒子(WIMP)的物理潜力。使用数据驱动的背景模型，使用频率和多变量分析方法，即轮廓似然和增强决策树来计算投影排除界限。同时考虑了当前和可实现的实验性能。探测器优化的最佳策略关键取决于是否将重点放在∼5GeV/c2以下或以上的wimp质量上。给出了在莫丹地下实验室(LSM)进行低质量WIMP搜索的下一阶段Edelweiss-III实验的预计灵敏度。到2018年，当σ质量在2-5GeV/c2范围内时，与自旋无关的wimp-核子截面的上限有望达到7×10-42cm2。还描述了未来为达到太阳中微子相干散射所施加的界限而设计的百公斤级实验的要求。通过将电离分辨率提高到50EVE，我们表明，这样的实验安装在更低的本底环境(例如SNOLAB)，加上1000公斤·年的曝光量，应该可以让我们在辨别后观察到大约80个B8中微子事件。
The physics potential of EDELWEISS detectors for the search of low-mass weakly interacting massive particles (WIMPs) is studied. Using a data-driven background model, projected exclusion limits are computed using frequentist and multivariate analysis approaches, namely, profile likelihood and boosted decision tree. Both current and achievable experimental performances are considered. The optimal strategy for detector optimization depends critically on whether the emphasis is put on WIMP masses below or above ∼5 GeV/c2. The projected sensitivity for the next phase of the EDELWEISS-III experiment at the Modane Underground Laboratory (LSM) for low-mass WIMP search is presented. By 2018 an upper limit on the spin-independent WIMP-nucleon cross section of σSI=7×10-42 cm2 is expected for a WIMP mass in the range 2–5 GeV/c2. The requirements for a future hundred-kilogram-scale experiment designed to reach the bounds imposed by the coherent scattering of solar neutrinos are also described. By improving the ionization resolution down to 50 eVee, we show that such an experiment installed in an even lower background environment (e.g., at SNOLAB) together with an exposure of 1000 kg·yr, should allow us to observe about 80 B8 neutrino events after discrimination.