First observation of neutrino trident production

Geiregat, D.; Wilquet, G.; Binder, U.; Burkard, H.; Dore, U.; Flegel, W.; Grote, H.; Mouthuy, T.; Øverås, H.; Panman, J.; Santacesaria, R.; Vilain, P.; Winter, K.; Zacek, G.; Zacek, V.; Beyer, R.; Büsser, F.W.; Foos, C.; Gerland, L.; Layda, T.; Niebergall, F.; Rädel, G.; Stähelin, P.; Voß, T.; Favart, D.; Grégoire, G.; Knoops, E. B. F. G.; Gorbunov, P.; Grigoriev, E.; Khovansky, V.; Maslennikov, A. L.; Rozanov, Alexandre; Lippich, W.; Nathaniel, A.; Staude, A.; Caria, M.; Eckart, B.; Ereditato, A.; Iasevoli, R.; Palladino, V.; Strohlin, P.; Capone, A.; Pedis, D. De; Capua, E. Di; Frenkel-Rambaldi, A.; Loverre, P.; Piredda, G.; Zanello, D.

doi:10.1016/0370-2693(90)90146-w

Cited by 157 publications

(145 citation statements)

References 13 publications

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“…3b, where the dark (light) red band shows the uncertainty coming from the 1σ (2σ ) errors in the parameters other than θ 23 . In this case, it turns out that the dominant contribution to the uncertainty (except for that from the error in θ 23 ) comes from the error in θ 13 , though the error in m 2 also gives a sizable contribution. We also show in the black dashed line the present limit imposed by the Planck experiment: i m i < 0.23 eV (Planck TT+lowP+lensing+ext) [68].…”

Section: Predictions For the Neutrino Parametersmentioning

confidence: 98%

“…We vary θ 23 in the 2σ renege, where the 1σ range is in between the vertical thin dotted lines. The dark (light) red bands show the uncertainty coming from the 1σ (2σ ) errors in the other parameters θ 12 , θ 13 , δm 2 , and m 2 . We find that this uncertainty is dominated by the error in θ 12 .…”

Section: Predictions For the Neutrino Parametersmentioning

confidence: 99%

“…θ 23 is varied in the 2σ range, and the 1σ range is in between the vertical thin dotted lines. The dark (light) red bands show the uncertainty coming from the 1σ (2σ ) errors in the parameters θ 12 , θ 13 , δm 2 , and m 2 . We also show the 1σ (2σ ) favored region of δ in the dark (light) horizontal green bands Next, we evaluate the neutrino masses m i , which are shown in Fig.…”

Section: Predictions For the Neutrino Parametersmentioning

confidence: 99%

“…model is uniquely determined for a given set of neutrino oscillation parameters θ 12 , θ 23 , θ 13 , δm 2 , m 2 , and sign(sin δ). Therefore, the mass matrix of the right-handed neutrino,…”

Section: Implications For Leptogenesismentioning

confidence: 99%

“…An attractive feature of this a e-mail: asai@hep-th.phys.s.u-tokyo.ac.jp class of models is that the muon g − 2 anomaly [5][6][7][8] may be explained by the loop contribution of the U(1) L μ −L τ gauge boson if its mass lies around the weak scale or lower [9][10][11][12], though this possibility is severely restricted by the searches of the neutrino trident production process [13][14][15][16]. These models may also explain anomalies in flavor physics [15,17] and offer promising candidates for dark matter in the Universe [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Predictions for the neutrino parameters in the minimal gauged $$\hbox {U}(1)_{L_\mu -L_\tau }$$ U ( 1 ) L μ - L τ model

2017

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We study the structure of the neutrino-mass matrix in the minimal gauged U(1) L μ −L τ model, where three right-handed neutrinos are added to the Standard Model in order to obtain non-zero masses for the active neutrinos. Because of the U(1) L μ −L τ gauge symmetry, the structure of both Dirac and Majorana mass terms of neutrinos is tightly restricted. In particular, the inverse of the neutrinomass matrix has zeros in the (μ, μ) and (τ, τ ) components, namely, this model offers a symmetric realization of the socalled two-zero-minor structure in the neutrino-mass matrix. Due to these constraints, all the CP phases -the Dirac CP phase δ and the Majorana CP phases α 2 and α 3 -as well as the mass eigenvalues of the light neutrinos m i are uniquely determined as functions of the neutrino mixing angles θ 12 , θ 23 , and θ 13 , and the squared mass differences m 2 21 and m 2 31 . We find that this model predicts the Dirac CP phase δ to be δ 1.59π -1.70π (1.54π -1.78π ), the sum of the neutrino masses to be i m i 0.14-0.22 eV (0.12-0.40 eV), and the effective mass for the neutrinoless double-beta decay to be m ββ 0.024-0.055 eV (0.017-0.12 eV) at 1σ (2σ ) level, which are totally consistent with the current experimental limits. These predictions can soon be tested in future neutrino experiments. Implications for leptogenesis are also discussed.

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Section: Predictions For the Neutrino Parametersmentioning

confidence: 98%

Section: Predictions For the Neutrino Parametersmentioning

confidence: 99%

Section: Predictions For the Neutrino Parametersmentioning

confidence: 99%

Section: Implications For Leptogenesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predictions for the neutrino parameters in the minimal gauged $$\hbox {U}(1)_{L_\mu -L_\tau }$$ U ( 1 ) L μ - L τ model

2017

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Neutrino trident scattering at near detectors

Ballett

Hostert

Pascoli

et al. 2019

J. High Energ. Phys.

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Neutrino trident scattering is a rare Standard Model process where a chargedlepton pair is produced in neutrino-nucleus scattering. To date, only the dimuon final-state has been observed, with around 100 total events, while the other channels are as yet unexplored. In this work, we compute the trident production cross section by performing a complete four-body phase space calculation for different hadronic targets. This provides a correct estimate both of the coherent and the diffractive contributions to these cross sections, but also allows us to address certain inconsistencies in the literature related to the use of the Equivalent Photon Approximation in this context. We show that this approximation can give a reasonable estimate only for the production of dimuon final-states in coherent scattering, being inadmissible for all other cases considered. We provide estimates of the number and distribution of trident events at several current and future near detector facilities subjected to intense neutrino beams from accelerators: five liquid-argon detectors (SBND, µBooNE, ICARUS, DUNE and νSTORM), the iron detector of T2K (INGRID) and three detectors made of composite material (MINOS, NOνA and MINERνA). We find that for many experiments, trident measurements are an attainable goal and a valuable addition to their near detector physics programme.

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Neutrino oscillation constraints on U(1)′ models: from non-standard interactions to long-range forces

Coloma

Gonzalez-Garcia

Maltoni

2021

J. High Energ. Phys.

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We quantify the effect of gauge bosons from a weakly coupled lepton flavor dependent U(1)′ interaction on the matter background in the evolution of solar, atmospheric, reactor and long-baseline accelerator neutrinos in the global analysis of oscillation data. The analysis is performed for interaction lengths ranging from the Sun-Earth distance to effective contact neutrino interactions. We survey ∼ 10000 set of models characterized by the six relevant fermion U(1)′ charges and find that in all cases, constraints on the coupling and mass of the Z′ can be derived. We also find that about 5% of the U(1)′ model charges lead to a viable LMA-D solution but this is only possible in the contact interaction limit. We explicitly quantify the constraints for a variety of models including $$ \mathrm{U}{(1)}_{B-3{L}_e} $$ U 1 B − 3 L e , $$ \mathrm{U}{(1)}_{B-3{L}_{\mu }} $$ U 1 B − 3 L μ , $$ \mathrm{U}{(1)}_{B-3{L}_{\tau }} $$ U 1 B − 3 L τ , $$ \mathrm{U}{(1)}_{B-\frac{3}{2}\left({L}_{\mu }+{L}_{\tau}\right)} $$ U 1 B − 3 2 L μ + L τ , $$ \mathrm{U}{(1)}_{L_e-{L}_{\mu }} $$ U 1 L e − L μ , $$ \mathrm{U}{(1)}_{L_e-{L}_{\tau }} $$ U 1 L e − L τ , $$ \mathrm{U}{(1)}_{L_e-\frac{1}{2}\left({L}_{\mu }+{L}_{\tau}\right)} $$ U 1 L e − 1 2 L μ + L τ . We compare the constraints imposed by our oscillation analysis with the strongest bounds from fifth force searches, violation of equivalence principle as well as bounds from scattering experiments and white dwarf cooling. Our results show that generically, the oscillation analysis improves over the existing bounds from gravity tests for Z′ lighter than ∼ 10−8→ 10−11 eV depending on the specific couplings. In the contact interaction limit, we find that for most models listed above there are values of g′ and MZ′ for which the oscillation analysis provides constraints beyond those imposed by laboratory experiments. Finally we illustrate the range of Z′ and couplings leading to a viable LMA-D solution for two sets of models.

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First observation of neutrino trident production

Cited by 157 publications

References 13 publications

Predictions for the neutrino parameters in the minimal gauged $$\hbox {U}(1)_{L_\mu -L_\tau }$$ U ( 1 ) L μ - L τ model

Predictions for the neutrino parameters in the minimal gauged $$\hbox {U}(1)_{L_\mu -L_\tau }$$ U ( 1 ) L μ - L τ model

Neutrino trident scattering at near detectors

Neutrino oscillation constraints on U(1)′ models: from non-standard interactions to long-range forces

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