Interplay between scintillation and ionization in liquid xenon Dark Matter searches

被引：47

作者：

Bezrukov, Fedor ^{[1
,2
]}

Kahlhoefer, Felix ^{[1
,3
]}

Lindner, Manfred ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[2] Univ Munich, D-80333 Munich, Germany

[3] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

来源：

ASTROPARTICLE PHYSICS | 2011年 / 35卷 / 03期

关键词：

Dark Matter search; Liquid xenon; WIMP; Relative scintillation efficiency; SLOW PROTONS; ELECTRONIC EXCITATION; PARTICLE COLLISIONS; ATOMIC-COLLISIONS; NUCLEAR RECOILS; STOPPING POWER; ENERGY-LOSSES; HEAVY-IONS; EFFICIENCY; ARGON;

D O I：

10.1016/j.astropartphys.2011.06.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We provide a new way of constraining the relative scintillation efficiency L(eff) for liquid xenon. Using a simple estimate for the electronic and nuclear stopping powers together with an analysis of recombination processes we predict both the ionization and the scintillation yields. Using presently available data for the ionization yield, we can use the correlation between these two quantities to constrain L(eff) from below. Moreover, we argue that more reliable data on the ionization yield would allow to verify our assumptions on the atomic cross sections and to predict the value of L(eff). We conclude that the relative scintillation efficiency should not decrease at low nuclear recoil energies, which has important consequences for the robustness of exclusion limits for low WIMP masses in liquid xenon Dark Matter searches. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：119 / 127

页数：9

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