Invisible and displaced dark matter signatures at Belle II

Duerr, Michael; Kahlhoefer, Felix; Tunney, Patrick; Schmidt-Hoberg, Kai; Ferber, Torben; Hearty, Christopher

doi:10.1007/JHEP02(2020)039

Journal Article

PUBDB-2020-00738

Invisible and displaced dark matter signatures at Belle II

Duerr, M. (Corresponding author)Extern* ; Ferber, T. (Corresponding author)DESY* ; Hearty, C. (Corresponding author)Extern* ; Kahlhoefer, F. (Corresponding author) ; Schmidt-Hoberg, K. (Corresponding author)DESY* ; Tunney, P. (Corresponding author)

2020
SISSA [Trieste]

Journal of high energy physics 2020(2), 39 (2020) [10.1007/JHEP02(2020)039]

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Please use a persistent id in citations: doi:10.1007/JHEP02(2020)039 doi:10.3204/PUBDB-2020-00738

Report No.: DESY-19-141; OUTP-19-10P; TTK-19-46; arXiv:1911.03176

Abstract: Many dark matter models generically predict invisible and displaced signatures at Belle II, but even striking events may be missed by the currently implemented search programme because of inefficient trigger algorithms. Of particular interest are final states with a single photon accompanied by missing energy and a displaced pair of electrons, muons, or hadrons. We argue that a displaced vertex trigger will be essential to achieve optimal sensitivity at Belle II. To illustrate this point, we study a simple but well-motivated model of thermal inelastic dark matter in which this signature naturally occurs and show that otherwise inaccessible regions of parameter space can be tested with such a search. We also evaluate the sensitivity of single-photon searches at BaBar and Belle II to this model and provide detailed calculations of the relic density target.

Keyword(s): dark matter: signature ; model: thermal ; trigger: vertex ; BELLE ; sensitivity ; missing-energy ; relic density ; electron ; photon ; hadron ; BaBar ; muon

Classification:

ddc:530

Note: 28 pages, 10 figures; v2: matches published version; thermal targets provided as ancillary files ; publication: JHEP 2002 (2020) 039 ; ;

Contributing Institute(s):

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Experiment(s):

No specific instrument

Appears in the scientific report 2020

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Creative Commons Attribution CC BY 4.0

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