Neutrino Lines from Majoron Dark Matter Julian Heeck based on: - - PowerPoint PPT Presentation

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Neutrino Lines from Majoron Dark Matter Julian Heeck based on: - - PowerPoint PPT Presentation

Jan 09, 2023 210 likes •581 views

Neutrino Lines from Majoron Dark Matter Julian Heeck based on: JH, Camilo Garcia-Cely, JHEP 1705 (2017) 102 [1701.07209]. NUFACT2017 28.9.2017 Is it possible to detect dark matter via neutrinos and not gamma-rays or anti-matter? Neutrinos

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SLIDE 1

Neutrino Lines from Majoron Dark Matter

Julian Heeck

based on: JH, Camilo Garcia-Cely, JHEP 1705 (2017) 102 [1701.07209].

NUFACT2017 28.9.2017

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SLIDE 2

Is it possible to detect dark matter via neutrinos and not gamma-rays or anti-matter?

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SLIDE 3

Julian Heeck (ULB) - Majorons 3

Neutrinos have masses and mix

  • Mass splittings ✔
  • Angles ✔
  • Phase(s) ✘
  • Ordering ✘
  • Mass scale ✘
  • Dirac vs.

Majorana ✘

  • Mass origin ✘
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SLIDE 4

Julian Heeck (ULB) - Majorons 4

  • 3 singlets NR + new scalar
  • Break U(1)B-L spontaneously:
  • For

Majoronic seesaw

Majoron Heavy scalar (inflaton?) B-L breaking scale [Chikashige, Mohapatra, Peccei, ‘81; Schechter, Valle, ‘82]

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SLIDE 5

Julian Heeck (ULB) - Majorons 5

Parametrization of our ignorance

  • Leaves 9 unknown parameters.
  • Here: hermitian

[Davidson, Ibarra, hep-ph/0104076]

  • One-to-one:
  • Useful: majoron loop couplings depend on

“Known”:

PMNS mixing matrix

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SLIDE 6

Julian Heeck (ULB) - Majorons 6

Tree-level couplings

  • Long lifetime → majoron dark matter!

[Berezinsky, Valle ‘93; Lattanzi, Valle ‘07; Queiroz, Sinha, ‘14]

  • DM abundance e.g. via freeze-in.

[McDonald, ‘02; Hall, Jedamzik, March-Russell, West ‘10; Frigerio, Hambye, Masso, ‘11]

Tiny coupling: neutrino mass over B-L breaking scale!

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SLIDE 7

Julian Heeck (ULB) - Majorons 7

Flavor of J → νk νk

Flavor ratios:

Mass eigenstates → no oscillations! [JH, Camilo Garcia-Cely, 1701.07209]

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SLIDE 8

Julian Heeck (ULB) - Majorons 8

Indirect detection

  • General limit from DM → invisible:

[Audren, Lesgourgues, Mangano, Serpico, Tram, ‘14]

  • Can we observe the neutrino lines?

– mJ > 10 TeV: No. Dominant decay is J →ννh(h). ► no line!

[Dudas, Mambrini, Olive, ‘15]

– Also want to avoid electroweak Bremsstrahlung.

[Kachelriess, Serpico, ‘07; Bell, Dent, Jacques, Weiler, ‘08; Queiroz, Yaguna, Weniger, ‘16]

– For MeV < mJ < 100 GeV: Yes!

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SLIDE 9

Julian Heeck (ULB) - Majorons 9

mJ (GeV) = 2 Eν

Lower limit on breaking scale f (GeV)

[JH, Camilo Garcia-Cely, 1701.07209]

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SLIDE 10

Julian Heeck (ULB) - Majorons 10

mJ (GeV) = 2 Eν

Lower limit on breaking scale f (GeV)

[JH, Camilo Garcia-Cely, 1701.07209]

Threshold for νe p → n e+.

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SLIDE 11

Julian Heeck (ULB) - Majorons 11

mJ (GeV) = 2 Eν

Lower limit on breaking scale f (GeV)

[JH, Camilo Garcia-Cely, 1701.07209]

Reinterpreted Super-K data.

[Palomares-Ruiz, 0712.1937]

Threshold for νe p → n e+.

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SLIDE 12

Julian Heeck (ULB) - Majorons 12

mJ (GeV) = 2 Eν

Lower limit on breaking scale f (GeV)

[JH, Camilo Garcia-Cely, 1701.07209]

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SLIDE 13

Julian Heeck (ULB) - Majorons 13

Look for neutrinos from light DM!

  • ν lines detectable down to MeV.
  • For free in searches for diffuse supernova

neutrino background.

  • Borexino = indirect DM detector.
  • Future direct DM detectors (LZ,

XENONnT) = indirect DM detectors.

  • Also Hyper-K, JUNO,...
  • DM → ν easily dominant channel, no

SU(2) argument as for multi-TeV DM.

[El Aisati, Garcia-Cely, Hambye, Vanderheyden, 1706.06600]

ν

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SLIDE 14

Julian Heeck (ULB) - Majorons 14

One-loop couplings

  • Diagonal:
  • Off-diagonal:
  • New parameter:
  • K = rest of seesaw!
  • One generation:

[Chikashige, Mohapatra, Peccei, ‘81; Pilaftsis ‘94]

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SLIDE 15

Julian Heeck (ULB) - Majorons 15

Indirect detection II

  • DM → ττ, bb, tt, … give

– continuous γ spectrum:

Integral, Fermi-LAT.

– anti-protons and positrons:

PAMELA, AMS-02.

  • DM decay around z ~ 1000:

– modification of CMB. [Slatyer, Wu, 1610.06933] – independent of DM profile.

e,p,γ

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SLIDE 16

Julian Heeck (ULB) - Majorons 16

Indirect detection II

  • DM → ττ, bb, tt, … give

– continuous γ spectrum:

Integral, Fermi-LAT.

– anti-protons and positrons:

PAMELA, AMS-02.

  • DM decay around z ~ 1000:

– modification of CMB. [Slatyer, Wu, 1610.06933] – independent of DM profile.

e,p,γ

[Slatyer, Wu, 1610.06933]

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SLIDE 17

Julian Heeck (ULB) - Majorons 17

[JH, Camilo Garcia-Cely, 1701.07209]

mJ (GeV)

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SLIDE 18

Julian Heeck (ULB) - Majorons 18

[JH, Camilo Garcia-Cely, 1701.07209]

mJ (GeV) Strong CMB limits.

[Slatyer, Wu, 1610.06933]

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SLIDE 19

Julian Heeck (ULB) - Majorons 19

[JH, Camilo Garcia-Cely, 1701.07209]

mJ (GeV) Strong CMB limits.

[Slatyer, Wu, 1610.06933]

Requires J→ hadrons.

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SLIDE 20

Julian Heeck (ULB) - Majorons 20

Two-loop couplings

  • Full calculation

highly non-trivial. [JH, Hiren Patel, in progress]

  • J-Z mixing formally similar to triplet majoron:

[Bazzocchi, Lattanzi, Riemer-Sørensen, Valle, 0805.2372]

  • Gives the only DM signature for mJ < MeV.

[Lattanzi, Riemer-Sørensen, Tórtola, Valle, ‘13; Queiroz, Sinha, ‘14]

(two loop) (one loop) [JH, Camilo Garcia-Cely, 1701.07209]

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SLIDE 21

Julian Heeck (ULB) - Majorons 21

Gamma line plot

mJ (GeV)

mJ (GeV)

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SLIDE 22

Julian Heeck (ULB) - Majorons 22

Gamma line plot

mJ (GeV)

mJ (GeV)

“MeV gap”, γ limits will improve a lot with e-ASTROGAM, AdEPT.

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SLIDE 23

Julian Heeck (ULB) - Majorons 23

Is it possible to detect dark matter via neutrinos and not gamma-rays or anti-matter? Yes!

depends on depends on

Independent / Complementary!

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SLIDE 24

Julian Heeck (ULB) - Majorons 24

Summary

  • Majoron couplings suppressed by U(1)L scale.
  • Automatically long-lived DM candidate.
  • Seesaw and leptogenesis for free.
  • For MeV < mJ: J→νν in Borexino, Super-K,…
  • Complementary to J→γγ, ℓℓ’, qq.

Always look out for lines!

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SLIDE 25

Backup

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SLIDE 26

Julian Heeck (ULB) - Majorons 26

Majoron = DM

  • Naturally light, long-lived DM candidate.
  • Indirect detection possible:

– MeV < mJ: J → νν, γγ, ff. – keV < mJ < MeV: J →γγ. Maybe warm DM.

[JH, Daniele Teresi, 1706.09909, 1709.07283]

  • Increase couplings to produce J in lab.
  • Measure seesaw parameters.

[JH, work in progress]

Majoron ≠ DM

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SLIDE 27

Julian Heeck (ULB) - Majorons 27

Reconstruct seesaw?

  • Jνν coupling to measure U(1)L scale f.
  • Use Jff couplings to reconstruct
  • Diagonal K entries from e.g. Jee, Jμμ, and Jγγ.
  • Off-diagonal |Kαβ| from LFV: α→ βJ.
  • Phase of off-diagonal Kαβ?

Take from axion/ALP searches.

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SLIDE 28

Julian Heeck (ULB) - Majorons 28

Lepton flavor violation

  • Standard LFV in seesaw:
  • Great signature, but requires light NR.
  • With majoron: look for mono-energetic lepton:

[Pilaftsis, ‘94; Feng, Moroi, Murayama, Schnapka, ‘98; Hirsch, Vicente, Meyer, Porod, ‘09]

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SLIDE 29

Julian Heeck (ULB) - Majorons 29

μ→e J with J→ invisible

  • TWIST, ‘15: limits on

different anisotropies.

  • Chiral coupling μPLeJ

suppresses sensitivity!

[JH, Camilo Garcia-Cely, 1701.07209]

  • Bremsstrahlung is

competitive: μ→e J γ.

[Goldman, Hallin, Hoffman, Piilonen, Preston, ‘87]

  • Approximate limit
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SLIDE 30

Julian Heeck (ULB) - Majorons 30

τ → ℓ J with J→ invisible

  • ARGUS, ‘95; 5e5 taus.
  • Belle, ‘16 prelim.; 1e9 taus.
  • Also interesting for LFV Z’.

[JH, 1602.03810; Altmannshofer, Chen, Dev, Soni, 1607.06832]

  • Improvement with Belle-II.
  • No limits yet on J→ visible or τ → ℓ J γ.

O(20) times better than ARGUS! τ → e J τ → μ J

mJ (GeV)

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SLIDE 31

Julian Heeck (ULB) - Majorons 31

Mass origin via seesaw mechanism

  • Introduce 3 singlets NR:
  • For
  • Majorana neutrinos: hope for 0νββ!
  • Bonus: leptogenesis (even with majoron).

[Aristizabal Sierra, Tortola, Valle, Vicente, ‘14]

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SLIDE 32

Julian Heeck (ULB) - Majorons 32

Parametrization of our ignorance

  • MR (3 parameters) and

with [Casas, Ibarra, hep-ph/0103065]

  • Just

[Davidson, Ibarra, hep-ph/0104076]

  • Hermitian, contains 9

real parameters.

  • “Known”:

PMNS mixing matrix

9 parameters not known:

  • r
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SLIDE 33

Julian Heeck (ULB) - Majorons 33

  • Instead of explicitly, break U(1)B-L spontaneously:
  • New scalar
  • Scalar potential:

Spontaneous B – L breaking

Majoron Heavy scalar (inflaton?) Breaking scale [Chikashige, Mohapatra, Peccei, ‘81; Schechter, Valle, ‘82]

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SLIDE 34

Julian Heeck (ULB) - Majorons 34

  • Spontaneous global U(1) breaking gives mJ = 0.
  • Non-zero mass from:

– Breaking by gravity, e.g. wormholes, – Anomalies, e.g. if U(1)B-L = U(1)PQ. – Explicit breaking, e.g.

Pseudo-Goldstone

[Alonso, Urbano, 1706.07415] [Mohapatra, Senjanovic ‘83; Langacker, Peccei, Yanagida ‘86; SMASH ‘16]

Stay ignorant here, just put mJ.

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SLIDE 35

Julian Heeck (ULB) - Majorons 35

Dark matter abundance

  • Freeze out via λJJHH:

– mJ ~ mh/2, – mJ > 400 GeV.

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SLIDE 36

Julian Heeck (ULB) - Majorons 36

Dark matter abundance

  • Freeze out via λJJHH:

– mJ ~ mh/2, – mJ > 400 GeV.

  • Freeze in:

[McDonald, ‘02; Hall, Jedamzik, March-Russell, West ‘10; Frigerio, Hambye, Masso, ‘11]

Lyman-α constraints < 12 keV! Use different mechanism:

JH, Teresi, 1706.09909, 1709.07283.

Stephen West