Direct Detection Signals from Absorption of Fermionic Dark Matter - - PowerPoint PPT Presentation

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Direct Detection Signals from Absorption of Fermionic Dark Matter - - PowerPoint PPT Presentation

Aug 07, 2023 457 likes •1.28k views

Direct Detection Signals from Absorption of Fermionic Dark Matter Jeff A. Dror, Gilly Elor, & RM 1905.12635, 1908.10861 += Tien-Tien Yu (in prep.) Berkeley Week @ IPMU, 1/17/20 Thank You! I have absorbed a lot! Robert McGehee I have

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SLIDE 1

Direct Detection Signals from Absorption of Fermionic Dark Matter

Jeff A. Dror, Gilly Elor, & RM += Tien-Tien Yu

Berkeley Week @ IPMU, 1/17/20

1905.12635, 1908.10861 (in prep.)

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SLIDE 2

Thank You!

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SLIDE 3

I have absorbed a lot!

Robert McGehee

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SLIDE 4

I have absorbed a lot!

Robert McGehee

anomalies, asymmetric dark matter,

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SLIDE 5

I have absorbed a lot!

Robert McGehee

anomalies, asymmetric dark matter,

axions/ALPs, baryogenesis, black holes,

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SLIDE 6

I have absorbed a lot!

Robert McGehee

anomalies, asymmetric dark matter,

axions/ALPs, baryogenesis, black holes,

bounces, cosmic strings, gravitational waves,

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SLIDE 7

I have absorbed a lot!

Robert McGehee

anomalies, asymmetric dark matter,

axions/ALPs, baryogenesis, black holes,

bounces, cosmic strings, gravitational waves,

large Q expansions, leptogenesis,

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SLIDE 8

I have absorbed a lot!

Robert McGehee

anomalies, asymmetric dark matter,

axions/ALPs, baryogenesis, black holes,

bounces, cosmic strings, gravitational waves,

large Q expansions, leptogenesis,

neutron star BSM bounds, novel direct detection,

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SLIDE 9

I have absorbed a lot!

Robert McGehee

anomalies, asymmetric dark matter,

axions/ALPs, baryogenesis, black holes,

bounces, cosmic strings, gravitational waves,

large Q expansions, leptogenesis,

neutron star BSM bounds, novel direct detection,

Q-balls, strong CP solutions, supernovae, superradiance, weak value

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SLIDE 10

I have absorbed a lot!

Robert McGehee

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SLIDE 11

I have absorbed a lot!

Robert McGehee

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SLIDE 12

I have absorbed a lot!

Robert McGehee

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SLIDE 13

I have absorbed a lot!

Robert McGehee

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SLIDE 14

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable

Robert McGehee

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SLIDE 15

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable

Robert McGehee

χ N χ N

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SLIDE 16

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable

Robert McGehee

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

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SLIDE 17

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable Eleanor Hall, Shin Kobayashi, David Dunsky, Zhengkang (Kevin) Zhang

Robert McGehee

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

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SLIDE 18

The WIMP Paradigm

Fermion ~10 GeV-10 TeV Stable Jacob Leedom, Hiromasa Nakatsuka, Ippei Obata

Robert McGehee

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

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SLIDE 19

The WIMP Paradigm

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

Robert McGehee

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

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SLIDE 20

Leave No Stone Unturned

Requiem for a WIMP

Robert McGehee

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SLIDE 21

Leave No Stone Unturned

Requiem for a WIMP

  • 1. Theory: everyone’s alternatives (future)
  • 2. Experiment: larger or lighter (future)

Robert McGehee

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SLIDE 22

Leave No Stone Unturned

Requiem for a WIMP

  • 1. Theory: everyone’s alternatives (future)
  • 2. Experiment: larger or lighter (future)
  • 3. Both: new DM & signals (present)

i. DM scattering off electrons (Essig, Mardon, Volansky [1108.5383]) ii. Boosted DM (Agashe, Cui, Necib, Thaler [1405.7370])

  • iii. Self-Destructing DM (Grossman, Harnik, Telem, Zhang [1712.00455])
  • iv. Fermionic Absorption DM

Robert McGehee

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SLIDE 23

Fermionic “Absorption”

Robert McGehee

χ N 𝑓± N’

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SLIDE 24

Fermionic “Absorption”

Robert McGehee

χ N 𝑓± N’ χ N,𝑓− ν N,𝑓−

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SLIDE 25

Fermionic “Absorption”

Robert McGehee

χ N 𝑓± N’ χ N,𝑓− ν N,𝑓−

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SLIDE 26

Outline

Motivation Charged Current Neutral Current

Robert McGehee

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SLIDE 27

Fermionic Absorption by Nuclear Targets

Jeff A. Dror, Gilly Elor, & RM 1905.12635, 1908.10861

Robert McGehee

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SLIDE 28

Charged Current

Robert McGehee

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SLIDE 29

χ N 𝑓± N’

Robert McGehee

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SLIDE 30

Target Isotope Dependence

Stable → “Induced” Beta Decay Threshold ~ MeV Large Experiments

Robert McGehee

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SLIDE 31

“Direct” Constraints

“Direct” → don’t rely on Χ being DM LHC constrains mediator Operator + Model dependent

Robert McGehee

(Belyaev et al [1807.03817])

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SLIDE 32

Decay Constraints

Robert McGehee

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SLIDE 33

Decay Constraints

Robert McGehee

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SLIDE 34

Decay Constraints

Essig, Kuflik, McDermott, Volansky, Zurek [1309.4091]

Robert McGehee

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SLIDE 35

Decay Constraints

Robert McGehee

Gong, Chen [0802.2296]

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SLIDE 36

Induced β− Decays

Robert McGehee

  • 𝑓−!
  • NR!
  • γ!
  • N’ Decay!

χ N 𝑓− N’

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SLIDE 37

Robert McGehee

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SLIDE 38

Robert McGehee

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SLIDE 39

Robert McGehee

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SLIDE 40

Robert McGehee

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SLIDE 41

Robert McGehee

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SLIDE 42

Induced β+ Decays

Robert McGehee

  • May be only signal (ADM)
  • Focus on Hydrogen

ഥ 𝜓 N 𝑓+ N’

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SLIDE 43

Robert McGehee

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SLIDE 44

Robert McGehee

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SLIDE 45

Neutral Current

Robert McGehee

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SLIDE 46

Robert McGehee

χ N ν N

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SLIDE 47

Robert McGehee

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SLIDE 48

Robert McGehee

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SLIDE 49

Robert McGehee

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SLIDE 50

Robert McGehee

LiH proposal by Budnik et al [1705.03016]

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SLIDE 51

Summary

Relaxing DM stability assumptions allows for novel signals and operators. Charged current operators induce β± decays with NR, 𝑓±, and γ signals. Neutral current operators yield peaked, correlated nuclear recoil (NR) signals. New searches at existing experiments can probe both neutral and charged current operators. Stay tuned for absorption by electrons!

Robert McGehee

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SLIDE 52

Backup Slides

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SLIDE 53

Fermionic Absorption by Electron Targets

Jeff A. Dror, Gilly Elor, RM, & Tien-Tien Yu (in preparation)

Robert McGehee

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SLIDE 54

χ 𝑓− 𝑓− ν

Robert McGehee

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SLIDE 55

Robert McGehee

Preliminary

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SLIDE 56

Robert McGehee

Preliminary

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SLIDE 57

Decay details

Robert McGehee

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SLIDE 58

Decay details: Charged current model

Robert McGehee

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SLIDE 59

Decay details: Neutral current model

Robert McGehee

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SLIDE 60

Robert McGehee

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SLIDE 61

Robert McGehee

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SLIDE 62

Robert McGehee

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SLIDE 63

Robert McGehee

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SLIDE 64

Robert McGehee

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SLIDE 65

Target Isotope Dependence

Stable → “Induced” Beta Decay Threshold ~ MeV Large Experiments

Robert McGehee

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SLIDE 66

Target Isotope Dependence

Unstable → Beta Endpoint Shifts Threshold ~ MeV Large Experiments

Robert McGehee

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SLIDE 67

Target Isotope Dependence

Unstable → Beta Endpoint Shifts Threshold ~ MeV Large Experiments Sufficient exposure hard Best bet: tritium beta decay

Robert McGehee

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SLIDE 68

Robert McGehee

Savchenko, Rudakovskyi [1903.01862]

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SLIDE 69

Robert McGehee

PTOLEMY benchmark [1902.05508]

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SLIDE 70

Robert McGehee

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SLIDE 71

Robert McGehee

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SLIDE 72

Robert McGehee

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SLIDE 73

Robert McGehee

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SLIDE 74

Robert McGehee

O, Ca, & W

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SLIDE 75

Robert McGehee

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SLIDE 76

Robert McGehee

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SLIDE 77

Robert McGehee

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SLIDE 78

Robert McGehee

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SLIDE 79

Robert McGehee

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SLIDE 80

Robert McGehee

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SLIDE 81

Robert McGehee