Absorption of Fermionic Dark Matter in Direct Detection Experiments - - PowerPoint PPT Presentation

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Absorption of Fermionic Dark Matter in Direct Detection Experiments - - PowerPoint PPT Presentation

Jan 17, 2024 632 likes •828 views

Absorption of Fermionic Dark Matter in Direct Detection Experiments J. A. Dror, G. Elor, Robert McGehee 1905.XXXXX Phenomenology 2019, 5/6/2019 The WIMP Paradigm Fermion ~10 GeV-10 TeV Stable N N XENON Collaboration, E. Aprile et

SLIDE 1

Absorption of Fermionic Dark Matter in Direct Detection Experiments

J. A. Dror, G. Elor, Robert McGehee 1905.XXXXX

Phenomenology 2019, 5/6/2019

SLIDE 2

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable

Robert McGehee 1/10

XENON Collaboration, E. Aprile et al., “Dark Matter Search Results from a One Ton-Year Exposure of XENON1T”, Phys. Rev. Lett. 121 (2018), no. 11, 111302

χ N χ N

SLIDE 3

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable Tongyan Lin, tomorrow!

Robert McGehee 2/10

XENON Collaboration, E. Aprile et al., “Dark Matter Search Results from a One Ton-Year Exposure of XENON1T”, Phys. Rev. Lett. 121 (2018), no. 11, 111302

SLIDE 4

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable Robert McGehee, right now!

Robert McGehee 2/10

XENON Collaboration, E. Aprile et al., “Dark Matter Search Results from a One Ton-Year Exposure of XENON1T”, Phys. Rev. Lett. 121 (2018), no. 11, 111302

SLIDE 5

The Signals

Robert McGehee 3/10

χ N,𝑓− ν χ N 𝑓± N’ χ ν γ χ 𝑓± 𝑓∓ ν N,𝑓−

SLIDE 6

DM Stability

Robert McGehee 4/10

Decays are unavoidable Operators must be stable enough Easy UV completions are sufficiently stable More freedom than sterile ν

SLIDE 7

The Operators

Robert McGehee 5/10

χ N ν N χ N 𝑓± N’

SLIDE 8

The Kinematics

Robert McGehee 6/10

Existing Experiments! Lighter DM! Peaked signals! Correlated signals! “Best” experiments changed relative to WIMPs

χ N ν N

SLIDE 9

Protophobic DM Neutral Currents

Robert McGehee 7/10

Preliminary

SLIDE 10

DM Enabled β± transitions (DEβs)

Robert McGehee 8/10

N doesn’t β± decay High energy 𝑓±! Nuclear recoil! γ from excited nucleus! Decay of unstable nucleus!

χ N 𝑓± N’

SLIDE 11

Searches for DEβs

Robert McGehee 9/10

Preliminary

SLIDE 12

Summary

Relaxing DM stability assumptions allows for novel signals and operators. Neutral current operators yield peaked, correlated nuclear recoil (NR) signals. Charged current operators yield β±, NR, and γ signals. New searches at existing experiments can probe both neutral and charged current operators. Fermionic DM absorption is an exciting playground for both experiments and model building!

Robert McGehee 10/10

SLIDE 13

Backup Slides

SLIDE 14

DM-Independent Constraints

Solar cooling/SN bounds OK since our Collider constraints Beta decays

Robert McGehee

ν

N χ N

SLIDE 15

Robert McGehee

SLIDE 16

Robert McGehee

SLIDE 17

Robert McGehee