PDF New physics searches in neutrino experiments

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New physics searches in neutrino experiments

Pilar Coloma

FlipPhysics Workshop

Valencia, March 25

^th

2022

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Pilar Coloma - IFT 2

Do we need new physics?

Experimental evidence:

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Dark matter

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Neutrino masses

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Matter-antimatter asymmetry

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Gravitational interaction

Theoretical indications:

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Strong CP problem

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Hierarchy problem

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Flavor puzzle

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Cosmological constant

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P. Coloma - IFIC 3

Mass scale Coupling

strength

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P. Coloma - IFIC 4

Mass scale Coupling

strength

Left-Right symmetries SUSY

Leptoquarks

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P. Coloma - IFIC 5

Mass scale Coupling

strength

Left-Right symmetries SUSY

Leptoquarks

Heavy neutrinos Dark

matter Dark photons Axions

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Why neutrino experiments?

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Why neutrino experiments?

1) CEvNS and ν-e scattering. Field is blooming with new data thanks to advances in detector technology

2) Neutrino oscillations: at short baselines, at very long

baselines, at very different energies, in matter, in vacuum, … 3) Very powerful sources (conventional neutrino beams,

reactors, spallation sources) with near detectors

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Searches using neutrino

scattering

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Searches using neutrino scattering

+ U(1)’

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Neutrino scattering

Scattering on quarks or nuclei

Scattering

on electrons

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Coherent neutrino-nucleus scattering

Freedman, PRD 9 (1974)

In the SM:

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Neutrino scattering

Scattering on quarks or nuclei

Scattering

on electrons

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Coherent neutrino-nucleus scattering

With a Z’:

Barranco, Miranda, Rashba, hep-ph/0508299

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Scattering via a light mediator

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Experimental landscape is blooming!

Figure from Coloma, Gonzalez-Garcia, Maltoni, Pinheiro, Urrea, arXiv: 2203.XXXXX

(bounds from: Coloma, Esteban, Gonzalez-Garcia, Larizgoitia, Monrabal, Palomares-Ruiz, 2202.10829;

CONUS, 2110.02174; Coloma, Gonzalez-Garcia, Maltoni, 2009.14220; CONNIE, 1910.04951;

Aliev, Bilmis, Deniz, Singh, Turan, Wong, 1502.07763)

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Searches using neutrino

oscillations

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Neutrino oscillations

Detector Source

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Neutrino oscillations

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Flavored Z’ models

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NSI in propagation

This will lead to a generalized matter potential affecting neutrino

oscillations:

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Flavored Z’ models

Coloma, Gonzalez-Garcia and Maltoni, 2009.14220

→ For sensitivities using DUNE, see yesterday’s talk by F. Capozzi

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How low in mass can we go?

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Long-range forces

See e.g. Gonzalez-Garcia, de Holanda, Masso, Zukanovich Funchal, hep-ph/0609094;

Grifols, Masso, hep-ph/0311141; Joshipura, Mohanty, hep-ph/0310210];

Davoudiasl, Lee, Marciano, 1102.5352; Wise and Zhang,1803.00591

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Long-range forces

Coloma, Gonzalez- Garcia and Maltoni 2009.14220

(see also Wise and Zhang, 1803.00591)

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Searches using neutrino beams

as fixed target experiments

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Pilar Coloma - IFT 26 decay pipe

Neutrino beams

detector Far

Near detector

O(500) km

focusing horn

O(500) m

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Heavy Neutral Leptons

Figure from Snowmass 2021 White Paper on Heavy Neutral Leptons

(see references therein)

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Dark matter production

MiniBooNE coll., 1807.06137 and 1702.02688

See also e.g. Batell, Pospelov and Ritz, 0906.5614; Batell, deNIverville, McKeen, Pospelov, Ritz, 1405.7049

→

for updated NA64 results, see L. Molina’s talk!

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Milli-charged particles

Signal

Background

Harnik, Liu, Palamara, 1902.03246 For the limit from the Argoneut coll., see 1911.07996

(see also, e.g., McGill, Plestid, Pospelov, Tsai, 1806.03310)

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Axion-like particles

Coloma, Hernandez, Urrea,

2202.03447

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Brdar, Dutta, Jang, Kim, et al, 2011.07054

(see also Kelly, Kumar, Liu, 2011.05995)

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Summary and conclusions

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Neutrino experiments have a great potential to constrain new particles weakly coupled to the SM:

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Precision tests of the three-neutrino oscillation picture

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Neutrino scattering measurements

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Atmospheric production of new particles

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Fixed target searches using near detectors

→ Other scenarios not discussed here include: sterile neutrino

oscillations, neutrino decoherence, CPT violation, neutrino decay,

dark matter interactions with neutrinos…

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Thank you!!

Work supported by Grants RYC2018-024240-I PID2019-108892RB-I00, CEX2020-001007-S

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Backup slides

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Kelly, Kumar, Liu, 2011.05995

(see also Brdar, Dutta, Jang, Kim, et al, 2011.07054)