Non-Standard Interactions with light mediators Yasaman Farzan IPM, - - PowerPoint PPT Presentation

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Non-Standard Interactions with light mediators Yasaman Farzan IPM, - - PowerPoint PPT Presentation

Oct 01, 2022 24 likes •648 views

Non-Standard Interactions with light mediators Yasaman Farzan IPM, Tehran Effects of NSI on neutrinos Neutral current Non-Standard Interaction (NSI): propagation of neutrinos in matter Charged current Non-Standard Interaction (NSI):

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Non-Standard Interactions with light mediators

Yasaman Farzan IPM, Tehran

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Effects of NSI on neutrinos

´ Neutral current Non-Standard Interaction (NSI): propagation of neutrinos in matter ´ Charged current Non-Standard Interaction (NSI): production and detection

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Effects of NSI on neutrinos

´ Neutral current Non-Standard Interaction (NSI): propagation of neutrinos in matter ´ Charged current Non-Standard Interaction (NSI): production and detection Focus of this talk

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Non-standard neutral current interaction

Neutrino propagation: Matter field Projection matrix

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Standard Oscillation

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Non-Standard matter effects

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Effects of NSI in long baseline experiments

´ Renewed interest in NSI ´ NSI can fake CP-violation and lead to wrong determination of octant Masud and Mehta, PRD 94(2016); Forero and Huber, PLB 117 (2016); Liao, Marfatia and Whistnant PRD 93 (2016); Agarwalla, Chatterjee and Palazzo, PLB 762 (2016) Underlying models for NSI with light mediators Y.F., PLB 748 (2015) 311; Y.F. and I. Shoemaker, JHEP 1607 (2016) 033; Y.F. and J. Heeck, PRD94 (2016) no 5, 53010, Y.F. and M. Tortola, Front. In Phys 6 (2018) 10

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LMA-Dark solution

´ LMA-Dark solution provides even a better fit. (suppression of low energy upturn)

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Total flux measurement at SNO

´ Neutral current ´ Deuteron dissociation ´ Gamow-Teller transition ´ Sensitive only to axial-vector interaction ´ No effect from

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Scattering experiments

NuTeV and CHARM rule out a large part (but not all) of parameter space of LMA-Dark solution. Davidson, Pena-Garay, Rius, SantaMaria, JHEP 2003

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Scattering experiments

NuTeV and CHARM rule out a large part (but not all of) parameter space of LMA-Dark solution. Davidson, Pena-Garay, Rius, SantaMaria, JHEP 2003 But not in the model that we shall present

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Underlying theory for LMA-Dark?

Various model with heavy intermediate particle For a review see:

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Too small NSI

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Suggestion

´ What if YF, A model for large non-standard interactions leading to LMA-Dark solution,

  • Phys. Lett. B748 (2015) 311-315; YF and J Heeck, Neutrinophilic nonstandard interactions,

PRD 94 (2016) 53010; YF and I Shoemaker, lepton flavor violating NSI via light mediator, JHEP 1607 (2016) 33. YF and M Tortola, “neutrino oscillations and non-standard interactions” to appear in Frontiers in physics

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Suggestion

´ What if ´ Bounds can be avoided not because the mass of the intermediate state is high But because coupling is small!

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Big Bang Nucleosynthesis

´ Huang, Ohlsson and Zhou, PRD 97 (2018) 75009

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Bounds on Couplings of neutrinos

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P Bakhti and YF, PRD 95 (2017) 095008

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P Bakhti and YF, PRD 95 (2017) 095008 Artamonov et al., BNL-E494 collaboration, PRD 79 (2009) 092004

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Coupling to quarks

´ Non-chiral couplings: No impact on total measurement at SNO ´ Flavor universal: Going to mass basis Y.F. and J Heeck, PRD 94 (2016) 053010

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Coupling to neutrinos

Direct coupling to neutrinos Gauge symmetry: Coupling to neutrinos through mixing with : Gauge symmetry:

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Coupling to neutrinos

´ Direct coupling to neutrinos Gauge symmetry:

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Harnik, Kopp and Machado, JCAP 1207 (2012) 026

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Anomaly cancelation: Reproducing best fit

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Anomaly cancelation

Adding a new generation of leptons (quarks) Adding a pair of fermions with opposite hypercharges

Non-perturbative Yukawa coupling

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Coupling of neutrinos through mixing

Fernandez-Martinez et al., JHEP 08 (2016) 033

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Coupling of neutrinos through mixing

Fernandez-Martinez et al., JHEP 08 (2016) 033

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Neutrino scattering experiments

Suppression factor

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Neutrino scattering experiments

Relaxing bounds from scattering experiments, NuTeV and CHARM

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YF and J Heeck, PRD94 (2016) 053010 LUX-Zeplin SuperCDMS SNOLAB

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COHERENT experiment

Neutrino source: Pion decay at rest Coloma et al, JHEP 1704 (2017) 116

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COHERENT experiment

´ Akimov et al., “Observation of Coherent Elastic neutrino Nucleus Scattering,” science 357 (2017) No 6356, 1123 Freedman, PRD 9 (1974) 1389.

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Set-up of the COHERENT experiment

´ Detector: 14.6 kg CsI scintillator ´ Source: Spallation Neutron Source (SNS) at Oak Ridge National Lab

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Akimov et al., Science 357 (2017) No 6356, 1123

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Akimov et al., Science 357 (2017) No 6356, 1123

  • P. Coloma, P. Denton, Gonzalez-Garcia,

Maltoni and Schwetz, “curtailing the dark Side in non-standard neutrino interaction,” JHEP 1704 (2017) 116 JHEP 1704 (2017) 116

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Standard coherent interaction

Liao and Marfatia, Phys Lett B775 (2017) 54

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Coherent interaction with light mediator

Liao and Marfatia, Phys Lett B775 (2017) 54

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Liao and Marfatia, Phys Lett B775 (2017) 54

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LMA-Dark after COHERENT data

Denton, YF Shoemaker, arXiv:1804.03660, to appear in JHEP

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Denton, YF Shoemaker, arXiv:1804.03660, to appear in JHEP

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Even lighter mediator

Hardy and Lasenby,JHEP 1702 (2017) 33 Free streaming at recombination: Cherry, Denton, YF and Shoemaker, Work in progress

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100 101 Eν [TeV] 0.0 0.2 0.4 0.6 0.8 1.0 P(νµ → νµ)

Cherry, Denton, Y.F. and shoemaker, Work in progress Liao and Marfatia, PRL 117 (2016) 71802

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100 101 Eν [TeV] 0.0 0.2 0.4 0.6 0.8 1.0 P(¯ νµ → ¯ νµ)

Cherry, Denton, Y.F. and shoemaker, Work in progress Liao and Marfatia, PRL 117 (2016) 71802

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Summary

´ gauge boson with and can lead to sizeable NSI. ´ COHERENT has not ruled out LMA-Dark yet! ´ Upcoming CEνNS experiments can test this scenario

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Backup slides

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´Observational consequences

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Emission in Supernova

´ Similar to ´ Reduced mean free path for Kamada and Yu, arXiv:1504.00711

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High energy cosmic neutrino

´ Kamada and Yu, arXiv:1504.00711 Background neutrino at rest

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Dip or gap in ICECUBE spectrum

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´ Theoretical prediction of dip in 400 TeV to PeV is robust! ´ Testing model

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Maltoni and Gonzalez-Garcia, JHEP 2013

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Kamada and Yu, 1504.00711

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Yukawa coupling of neutrinos

Basis change: Mix:

No mixing:

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Majorana masses

If there is no Majorana mass for right-handed neutrinos: 1) 2) Smallness of neutrino mass

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Majorana masses

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Neutrino trident scattering

´ CCFR collaboration: ´ CHARM II collaboration PRL66 (1991) PLB 245 (1990)

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Neutrino trident scattering

Altmannshofer et al., PRL113 (2014)

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Davidson, Pena-Garay, Rius, SantaMaria, JHEP 2003 NuTeV: Muon neutrino energy~75 GeV

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Davidson, Pena-Garay, Rius, SantaMaria, JHEP 2003

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Standard coherent interaction

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