Using energy peaks to count dark matter particles in decays

被引:28
作者
Agashe, Kaustubh [1 ]
Franceschini, Roberto [1 ]
Kim, Doojin [1 ]
Wardlow, Kyle [1 ]
机构
[1] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA
基金
美国国家科学基金会;
关键词
Collider signature of dark matter; Distinguishing dark matter stabilization symmetries; Counting dark matter particles; MEASURING MASSES;
D O I
10.1016/j.dark.2013.03.003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the determination of the symmetry that stabilizes a dark matter (DM) candidate produced at colliders. Our question is motivated per se, and by several alternative symmetries that appear in models that provide a DM particle. To this end, we devise a strategy to determine whether a heavy mother particle decays into one visible massless particle and one or two DM particles. The counting of DM particles in these decays is relevant to distinguish the minimal choice of Z(2) from a Z(3) stabilization symmetry, under which the heavy particle and the DM are charged and the visible particle is not. Our method is novel in that it chiefly uses the peak of the energy spectrum of the visible particle and only secondarily uses the M-T2 endpoint of events in which the heavy mother particles are pair-produced. We present new theoretical results concerning the energy distribution of the decay products of a three-body decay, which are crucial for our method. To demonstrate the feasibility of our method in investigating the stabilization symmetry, we apply it in distinguishing the decay of a bottom quark partner into a b quark and one or two DM particles. The method can be applied generally to distinguish two-and three-body decays, irrespective of DM. (C) 2013 The Authors. Published by Elsevier B.V.
引用
收藏
页码:72 / 82
页数:11
相关论文
共 53 条
[1]  
Adul-pravitchai A., 2011, PHYS LETT B, V700, P207
[2]   Baryon number in warped grand unified theories: model building and (dark matter related) phenomenology [J].
Agashe, K ;
Servant, G .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2005, (02) :27-92
[3]  
Agashe K., ARXIV10124460HEPPH
[4]  
Agashe K., ARXIV12090772HEPPH
[5]   Distinguishing dark matter stabilization symmetries using multiple kinematic edges and cusps [J].
Agashe, Kaustubh ;
Kim, Doojin ;
Toharia, Manuel ;
Walker, Devin G. E. .
PHYSICAL REVIEW D, 2010, 82 (01)
[6]   Same-sign charginos and majorana neutralinos at the CERN LHC [J].
Alwall, Johan ;
Rainwater, Dave ;
Plehn, Tilman .
PHYSICAL REVIEW D, 2007, 76 (05)
[7]   B′s with direct decays: Tevatron and LHC discovery prospects in the b(b)over-bar+∋T channel [J].
Alwall, Johan ;
Feng, Jonathan L. ;
Kumar, Jason ;
Su, Shufang .
PHYSICAL REVIEW D, 2011, 84 (07)
[8]   MadGraph 5: going beyond [J].
Alwall, Johan ;
Herquet, Michel ;
Maltoni, Fabio ;
Mattelaer, Olivier ;
Stelzer, Tim .
JOURNAL OF HIGH ENERGY PHYSICS, 2011, (06)
[9]   Dark matter-motivated searches for exotic fourth-generation mirror quarks in Tevatron and early LHC data [J].
Alwall, Johan ;
Feng, Jonathan L. ;
Kumar, Jason ;
Su, Shufang .
PHYSICAL REVIEW D, 2010, 81 (11)
[10]  
[Anonymous], ARXIV11033053HEPPH