Limits on the non-standard interactions of neutrinos from e+e− colliders

Berezhiani, Zurab; Rossi, Anna Maria

doi:10.1016/s0370-2693(02)01767-7

Cited by 166 publications

(237 citation statements)

References 32 publications

(62 reference statements)

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“…On the other hand the analysis of the e e ÿ ! cross section measured at LEP II leads to a bound on j" eP j & 0:5 [33]. Future prospects to improve the current limits imply the measurement of sin 2 # W leptonically in the scattering of electrons in the target, as well as in neutrino deep inelastic scattering in a future neutrino factory.…”

Section: A Laboratorymentioning

confidence: 98%

Probing nonstandard neutrino interactions with supernova neutrinos

2007

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We analyze the possibility of probing nonstandard neutrino interactions (NSI, for short) through the detection of neutrinos produced in a future galactic supernova (SN). We consider the effect of NSI on the neutrino propagation through the SN envelope within a three-neutrino framework, paying special attention to the inclusion of NSI-induced resonant conversions, which may take place in the most deleptonized inner layers. We study the possibility of detecting NSI effects in a Megaton water Cherenkov detector, either through modulation effects in the e spectrum due to (i) the passage of shock waves through the SN envelope, (ii) the time dependence of the electron fraction, and (iii) the Earth matter effects; or, finally, through the possible detectability of the neutronization e burst. We find that the e spectrum can exhibit dramatic features due to the internal NSI-induced resonant conversion. This occurs for nonuniversal NSI strengths of a few %, and for very small flavor-changing NSI above a few 10 ÿ5 .

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Section: A Laboratorymentioning

confidence: 98%

Probing nonstandard neutrino interactions with supernova neutrinos

2007

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“…They are constrained by solar [37,[50][51][52][53][54][55][56], atmospheric [38,39,46,[57][58][59][60], long-baseline [41-43, 45, 48, 60, 61], collider [11,44,47,62], cosmological [63], and neutrino scattering data [36,40,49].…”

Section: Introductionmentioning

confidence: 99%

New orνmissing energy: Discriminating dark matter from neutrino interactions at the LHC

2016

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Missing energy signals such as monojets are a possible signature of Dark Matter (DM) at colliders. However, neutrino interactions beyond the Standard Model may also produce missing energy signals. In order to conclude that new "missing particles" are observed the hypothesis of BSM neutrino interactions must be rejected. In this paper, we first derive new limits on these Non-Standard neutrino Interactions (NSIs) from LHC monojet data. For heavy NSI mediators, these limits are much stronger than those coming from traditional low-energy ν scattering or ν oscillation experiments for some flavor structures. Monojet data alone can be used to infer the mass of the "missing particle" from the shape of the missing energy distribution. In particular, 13 TeV LHC data will have sensitivity to DM masses greater than ∼ 1 TeV. In addition to the monojet channel, NSI can be probed in multi-lepton searches which we find to yield stronger limits at heavy mediator masses. The sensitivity offered by these multi-lepton channels provide a method to reject or confirm the DM hypothesis in missing energy searches.

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“…While strong constraints exist from ν µ interactions with a down-type quark (ε dP eµ 10 −3 , ε dP µµ 10 −3 − 10 −2 ) from CHARM and NuTeV [25], the constraints for all other NSI couplings, including those involved in solar neutrino physics, are rather loose [25,26]. Therefore, in our analysis we consider ε dP αµ = 0 and we concentrate our efforts in the rest of NSI parameters.…”

Section: Introductionmentioning

confidence: 99%

Are solar neutrino oscillations robust?

Miranda

Tórtola²,

Valle

2006

J. High Energy Phys.

213

254

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The robustness of the large mixing angle (LMA) oscillation (OSC) interpretation of the solar neutrino data is considered in a more general framework where nonstandard neutrino interactions (NSI) are present. Such interactions may be regarded as a generic feature of models of neutrino mass. The 766.3 ton-yr data sample of the Kam-LAND collaboration are included in the analysis, paying attention to the background from the reaction 13 C(α, n) 16 O. Similarly, the latest solar neutrino fluxes from the SNO collaboration are included. In addition to the solution which holds in the absence of NSI (LMA-I) there is a "dark-side" solution (LMA-D) with sin 2 θ sol = 0.70, essentially degenerate with the former, and another light-side solution (LMA-0) allowed only at 97% CL. More precise KamLAND reactor measurements will not resolve the ambiguity in the determination of the solar neutrino mixing angle θ sol , as they are expected to constrain mainly ∆m 2 sol . We comment on the complementary role of atmospheric, laboratory (e. g. CHARM) and future solar neutrino experiments in lifting the degeneracy between the LMA-I and LMA-D solutions. In particular, we show how the LMA-D solution induced by the simplest NSI between neutrinos and down-type-quarks-only is in conflict with the combination of current atmospheric data and data of the CHARM experiment. We also mention that establishing the issue of robustness of the oscillation picture in the most general case will require further experiments, such as those involving low energy solar neutrinos.

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Limits on the non-standard interactions of neutrinos from e+e− colliders

Cited by 166 publications

References 32 publications

Probing nonstandard neutrino interactions with supernova neutrinos

Probing nonstandard neutrino interactions with supernova neutrinos

New orνmissing energy: Discriminating dark matter from neutrino interactions at the LHC

Are solar neutrino oscillations robust?

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