An R-parity Violating Supersymmetric Explanation of the EeV Events - - PowerPoint PPT Presentation

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An R-parity Violating Supersymmetric Explanation of the EeV Events - - PowerPoint PPT Presentation

Jan 15, 2023 122 likes •784 views

An R-parity Violating Supersymmetric Explanation of the EeV Events at ANITA Yicong Sui Washington University in St. Louis In collaboration with Jack Collins and Bhupal Dev, arXiv:1810.xxxxx Antarctic Impulse Transient Antenna (ANITA)

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An R-parity Violating Supersymmetric Explanation of the EeV Events at ANITA

Yicong Sui Washington University in St. Louis

In collaboration with Jack Collins and Bhupal Dev, arXiv:1810.xxxxx

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SLIDE 2
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SLIDE 3

Antarctic Impulse Transient Antenna (ANITA) Experiment

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Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

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Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

Totally three flights, adding up to 67 days of total observation time

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Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

Table from ANITA, 1803.05088

Totally three flights, adding up to 67 days of total observation time

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SLIDE 7

Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

Table from ANITA, 1803.05088

Properties of the anomalous upward events 1.Large Elevation Angle, going upwards. 2.No Polarity Reverse Relative to Geomagnetic Field. 3.Both have large energy~0.5EeV 4.Both interpreted as tau events by ANITA

Totally three flights, adding up to 67 days of total observation time

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SLIDE 8

Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

Table from ANITA, 1803.05088

Properties of the anomalous upward events 1.Large Elevation Angle, going upwards. 2.No Polarity Reverse Relative to Geomagnetic Field. 3.Both have large energy~0.5EeV 4.Both interpreted as tau events by ANITA

Totally three flights, adding up to 67 days of total observation time

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SLIDE 9

Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

Table from ANITA, 1803.05088

Properties of the anomalous upward events 1.Large Elevation Angle, going upwards. 2.No Polarity Reverse Relative to Geomagnetic Field. 3.Both have large energy~0.5EeV 4.Both interpreted as tau events by ANITA

Totally three flights, adding up to 67 days of total observation time

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SLIDE 10

Antarctic Impulse Transient Antenna (ANITA) Experiment

The ANITA detection concepts, figure from Cosmin Deaconu

Table from ANITA, 1803.05088

Properties of the anomalous upward events 1.Large Elevation Angle, going upwards. 2.No Polarity Reverse Relative to Geomagnetic Field. 3.Both have large energy~0.5EeV 4.Both interpreted as tau events by ANITA

Totally three flights, adding up to 67 days of total observation time

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SLIDE 11

Things hard to explain

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SLIDE 12

θ ~60 degrees

Things hard to explain

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θ

R ~ 6400 km

~60 degrees

Things hard to explain

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θ

R ~ 6400 km D = 2R cos(θ) > 5700 km

~60 degrees

Things hard to explain

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SLIDE 15

θ

R ~ 6400 km D = 2R cos(θ) > 5700 km

l

S M

~ 300 km (in rock)

~60 degrees

Things hard to explain

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SLIDE 16

θ

R ~ 6400 km D = 2R cos(θ) > 5700 km

l

S M

~ 300 km (in rock)

Neutrino SM CC NC interaction ~60 degrees

Things hard to explain

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SLIDE 17

θ

R ~ 6400 km D = 2R cos(θ) > 5700 km

l

S M

~ 300 km (in rock)

Psurvival ~ 10-6

= 0.0001%

Neutrino SM CC NC interaction ~60 degrees

Things hard to explain

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SLIDE 18

θ

R ~ 6400 km D = 2R cos(θ) > 5700 km

l

S M

~ 300 km (in rock)

Psurvival ~ 10-6

= 0.0001%

Neutrino SM CC NC interaction ~60 degrees

Things hard to explain

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SLIDE 19

Some plausible scenarios:

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SLIDE 20

Some plausible scenarios:

  • Sterile Neutrino Explanation
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SLIDE 21

Some plausible scenarios:

  • Sterile Neutrino Explanation
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SLIDE 22

Some plausible scenarios:

  • Dark matter inside Earth

Explanation

  • Sterile Neutrino Explanation
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SLIDE 23

Some plausible scenarios:

  • Dark matter inside Earth

Explanation

  • stau Explanation
  • Sterile Neutrino Explanation
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SLIDE 24

Some plausible scenarios:

  • Dark matter inside Earth

Explanation

  • stau Explanation
  • Sterile Neutrino Explanation

Needs large coupling or large flux

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SLIDE 25

Some plausible scenarios:

  • Dark matter inside Earth

Explanation

  • stau Explanation

No vertical direction event detected. Angular distribution does not match.

  • Sterile Neutrino Explanation

Needs large coupling or large flux

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SLIDE 26

Some plausible scenarios:

  • Dark matter inside Earth

Explanation

  • stau Explanation

No vertical direction event detected. Angular distribution does not match.

  • Sterile Neutrino Explanation

Needs large coupling or large flux IceCube consistency

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Our Proposal : Long lived neutral particle

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SLIDE 28

Our Proposal : Long lived neutral particle

interaction point

ν+ e →χ+τ decay point χ→ν+ e +τ

ν e

τ

h

θ

l1 l2 h ltot

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SLIDE 29

Our Proposal : Long lived neutral particle

interaction point

ν+ e →χ+τ decay point χ→ν+ e +τ

ν e

τ

h

θ

l1 l2 h ltot

Requirements:

  • 1. ν e interaction produces neutral

particle χ and lepton

  • 2. χ is long lived and relatively

stable

  • 3. χ could still decay back into

leptons

  • 4. τ detected by ANITA is not from

ν, but from this χ decay

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SLIDE 30

Our Proposal : Long lived neutral particle

interaction point

ν+ e →χ+τ decay point χ→ν+ e +τ

ν e

τ

h

θ

l1 l2 h ltot

Requirements:

  • 1. ν e interaction produces neutral

particle χ and lepton

  • 2. χ is long lived and relatively

stable

  • 3. χ could still decay back into

leptons

  • 4. τ detected by ANITA is not from

ν, but from this χ decay Benefits: χ is neutral and quasi-stable, easier to go through Earth, no need to worry about SM interactions for neutrinos Not limited to tau-neutrino flux since we assume lepton flavor violation

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SLIDE 31

Our Proposal : Long lived neutral particle

interaction point

ν+ e →χ+τ decay point χ→ν+ e +τ

ν e

τ

h

θ

l1 l2 h ltot

Requirements:

  • 1. ν e interaction produces neutral

particle χ and lepton

  • 2. χ is long lived and relatively

stable

  • 3. χ could still decay back into

leptons

  • 4. τ detected by ANITA is not from

ν, but from this χ decay Benefits: χ is neutral and quasi-stable, easier to go through Earth, no need to worry about SM interactions for neutrinos Not limited to tau-neutrino flux since we assume lepton flavor violation

Our candidate for χ is bino in RPV SUSY (LLE type)

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Interaction and Decay

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Interaction and Decay

  • SUSY RPV term
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SLIDE 34

Interaction and Decay

  • SUSY RPV term
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SLIDE 35

Interaction and Decay

  • SUSY RPV term

λ geff

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SLIDE 36

Interaction and Decay

  • SUSY RPV term

λ geff

  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743
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SLIDE 37

Interaction and Decay

  • SUSY RPV term

λ geff

  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743
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SLIDE 38

Interaction and Decay

  • SUSY RPV term

λ geff

  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743
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SLIDE 39

Interaction and Decay

  • SUSY RPV term

λ geff

  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743

@ resonance, naturally enhancing the cross section

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SLIDE 40

Interaction and Decay

  • SUSY RPV term

λ geff

  • χ decay
  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743

@ resonance, naturally enhancing the cross section

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SLIDE 41

Interaction and Decay

  • SUSY RPV term

λ geff

  • χ decay
  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743

@ resonance, naturally enhancing the cross section

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SLIDE 42

Interaction and Decay

  • SUSY RPV term

λ geff

  • χ decay
  • M. Carena, D. Choudhury, S. Lola, C. Quigg, Hep-ph/9804380;
  • P. S. Bhupal Dev, Dilip Kumar Ghosh, Werner Rodejohann.1605.09743

@ resonance, naturally enhancing the cross section

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Possible sources of ANITA events

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  • Isotropic source : GZK~

Possible sources of ANITA events

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  • Isotropic source : GZK~

Possible sources of ANITA events

ν coming from CR CMB p gamma collision

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SLIDE 46
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events

ν coming from CR CMB p gamma collision

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SLIDE 47
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux:

ν coming from CR CMB p gamma collision

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SLIDE 48
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux:

ν coming from CR CMB p gamma collision

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SLIDE 49
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux:

ν coming from CR CMB p gamma collision

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SLIDE 50
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL:

ν coming from CR CMB p gamma collision

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SLIDE 51
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL:

ν coming from CR CMB p gamma collision

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SLIDE 52
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL:

ν coming from CR CMB p gamma collision

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SLIDE 53
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL:

ν coming from CR CMB p gamma collision

  • Anisotropic source :

AGN, GRB or SBG

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SLIDE 54
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL:

ν coming from CR CMB p gamma collision

  • Anisotropic source :

AGN, GRB or SBG

ν coming from

pp,p gamma interaction

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SLIDE 55
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL: Provide a larger flux and a more direction- focused beam.

ν coming from CR CMB p gamma collision

  • Anisotropic source :

AGN, GRB or SBG

ν coming from

pp,p gamma interaction

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SLIDE 56
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL: Provide a larger flux and a more direction- focused beam. Transient source could make IceCube

  • bservation time advantage irrelevant.

ν coming from CR CMB p gamma collision

  • Anisotropic source :

AGN, GRB or SBG

ν coming from

pp,p gamma interaction

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SLIDE 57
  • Isotropic source : GZK~

Possible sources of ANITA events

A test for GZK based on ANITA events For any general NP process assuming GZK flux: Expected event number N in 3σ CL: Provide a larger flux and a more direction- focused beam. Transient source could make IceCube

  • bservation time advantage irrelevant.

IceCube Collaberation 1609.04981

ν coming from CR CMB p gamma collision

  • Anisotropic source :

AGN, GRB or SBG

ν coming from

pp,p gamma interaction

AGN flux:

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Results

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Event Constraint

Results

&

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Event Constraint Geometry Constraint

Results

&

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Event Constraint Geometry Constraint

Results

&

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Conclusion

  • We propose that bino χ in RPV SUSY could be a

suitable interpretation for ANITA events.

  • χ should be long-lived with

with mass around a few GeV, with LLE coupling λ ~ 0.2.

  • Isotropic source (GZK) cannot provide enough events

to fit ANITA observation.

  • Anisotropic/transient source could fit ANITA data while

being consistent with IceCube.

  • Should be testable in the near future.
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Thank you !

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Anisotropic sources Geometry Constraint Event Constraint

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SLIDE 65
  • Report ANITA events again with some details: upgoing, none phase reflection→ meaning those

are events coming from Earth.

  • Explain why SM neutrino cannot past through Earth in such angle; and the effective area

comparison between IceCube and ANITA and their results contradiction

  • Ideas of BSM of getting around such stuff by Cherry, Huang, Dark matter people, stau people.

Still has some IceCube contradiction

  • To solve IceCube contradiction, we propose our model (cartoon explanation), such model

requires we have bino particle with certain interaction

  • This interaction could be provide by RPV SUSY and the bino being LSP particle
  • ---------------------- some introduction of the theory
  • Possible sources of ANITA events and rough estimate shows that GZK cannot be the source for

the events

  • Setting up favored region for parameters: Geometry constraint and Events fitting constraint

calculation

  • Showing such constraints
  • conclude