Loop effect in the coherent neutrino-nucleus scattering

Li, Tong; Liao, Jiajun

doi:10.1007/jhep02(2021)099

Cited by 5 publications

(4 citation statements)

References 46 publications

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“…The reliable estimate of the flavor observable relies on the UV completion realization. As the K → π transitions are induced by flavor changing neutral currents, they set stringent constraints on g q coupling for up-type quarks [5,25]. We thus assume non-universal g q couplings for up-type and down-type quarks and neglect the up-type quark coupling in the following calculations.…”

Section: B Constraintsmentioning

confidence: 99%

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Loop effect with vector mediator in the coherent neutrino-nucleus scattering

Chao,

Li,

Liao

et al. 2021

Preprint

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The active neutrinos can convert into a new exotic fermion χ through coherent neutrino-nucleus scattering νN → χN and thus the ν − χ interaction leads to novel recoil spectrum in the neutrino scattering experiments. We study the general neutrino interactions by evaluating both the tree-level and loop-level contributions to the coherent elastic neutrino-nucleus scattering (CEνNS). The loop diagrams produce active neutrino elastic scattering process νN → νN with the fermion χ inside the loops. The neutrino interaction is illustrated by the framework of a simplified neutrino model in which a new Dirac fermion χ interacts with active neutrinos and a leptophobic vector mediator Z . For the Z q q coupling being vector type and axialvector type, the CEνNS processes are dominated by the tree-level and loop-level contribution, respectively.We investigate the constraints on the couplings between Z and the new particle χ or the Standard Model quarks by fitting to the COHERENT data. The parameter space with m χ larger than the maximal energy of incoming neutrinos can also be constrained by including the loop-level contribution. More importantly, the inclusion of loop diagrams can place constraint on axial-vector interaction whose the tree-level process is absent in the coherent neutrino-nucleus scattering.

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Section: B Constraintsmentioning

confidence: 99%

“…As a result, for the pseudoscalar or axial quark interaction, the full calculation involving the loop corrections would lead to sizable recoil events in DM direct detection experiments. We can apply the spirit of this loop effect to consider the loop corrections of the above inelastic neutrino scattering process [25].…”

Section: Introductionmentioning

confidence: 99%

Loop effect with vector mediator in the coherent neutrino-nucleus scattering

Chao,

Li,

Liao

et al. 2021

Preprint

Self Cite

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show abstract

“…The couplings between the neutrinos and sub-GeV DM through the scattering off nucleus have been studied in refs. [2][3][4][5][6][7][8][9]. There are also plenty of novel models and signatures proposed to search for sub-GeV DM through the scattering off electrons [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments

Chen

Liao

2021

J. High Energ. Phys.

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The couplings between the neutrinos and exotic fermion can be probed in both neutrino scattering experiments and dark matter direct detection experiments. We present a detailed analysis of the general neutrino interactions with an exotic fermion and electrons at neutrino-electron scattering experiments. We obtain the constraints on the coupling coefficients of the scalar, pseudoscalar, vector, axialvector, tensor and electromagnetic dipole interactions from the CHARM-II, TEXONO and Borexino experiments. For the flavor-universal interactions, we find that the Borexino experiment sets the strongest bounds in the low mass region for the electromagnetic dipole interactions, and the CHARM-II experiment dominates the bounds for other scenarios. If the interactions are flavor dependent, the bounds from the CHARM-II or TEXONO experiment can be avoided, and there are correlations between the flavored coupling coefficients for the Borexino experiment. We also discuss the detection of sub-MeV DM absorbed by bound electron targets and illustrate that the vector coefficients preferred by XENON1T data are allowed by the neutrino-electron scattering experiments.

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“…The couplings between the neutrinos and sub-GeV DM through the scattering off nucleus have been studied in Ref. [2][3][4][5][6][7][8][9]. There are also plenty of novel models and signatures proposed to search for sub-GeV DM through the scattering off electrons [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments

Chen,

Li,

Liao

2021

Preprint

Self Cite

View full text Add to dashboard Cite

The couplings between the neutrinos and exotic fermion can be probed in both neutrino scattering experiments and dark matter direct detection experiments. We present a detailed analysis of the general neutrino interactions with an exotic fermion and electrons at neutrino-electron scattering experiments. We obtain the constraints on the coupling coefficients of the scalar, pseudoscalar, vector, axialvector, tensor and electromagnetic dipole interactions from the CHARM-II, TEXONO and Borexino experiments. For the flavoruniversal interactions, we find that the Borexino experiment sets the strongest bounds in the low mass region for the electromagnetic dipole interactions, and the CHARM-II experiment dominates the bounds for other scenarios. If the interactions are flavor dependent, the bounds from the CHARM-II or TEXONO experiment can be avoided, and there are correlations between the flavored coupling coefficients for the Borexino experiment. We also discuss the detection of sub-MeV DM absorbed by bound electron targets and illustrate that the vector coefficients preferred by XENON1T data is allowed by the neutrino experiments.

show abstract

Loop effect in the coherent neutrino-nucleus scattering

Cited by 5 publications

References 46 publications

Loop effect with vector mediator in the coherent neutrino-nucleus scattering

Loop effect with vector mediator in the coherent neutrino-nucleus scattering

Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments

Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments

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