Exploring new physics from ν events in OPERA

Meloni, Davide

doi:10.1016/j.physletb.2019.03.042

Cited by 7 publications

(8 citation statements)

References 22 publications

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“…Despite such difficulties, upcoming multipurpose neutrino experiments, such as DUNE [14], are well posed to detect tau neutrinos given their large fiducial volume, powerful neutrino beam and exquisite track reconstruction capability. There have been a number of works which explore the tau neutrino sector including pioneering proposals for observing ν τ at beam dump experiments [15] and the subsequent experimental search by NOMAD [16], polarization effects on τ decay products for atmospheric and beam ν τ searches [17][18][19][20][21], optimization of cuts on τ decay products in the DUNE beam neutrino sample [22], tests of unitarity and patterns of leptonic mixing [23][24][25] and beyond the Standard Model physics probes with ν τ measurements [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Tau neutrinos at DUNE: New strategies, new opportunities

2020

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We propose a novel analysis strategy, which leverages the unique capabilities of the DUNE experiment, to study tau neutrinos. We integrate collider physics ideas, such as jet clustering algorithms in combination with machine learning techniques, into neutrino measurements. Through the construction of a set of observables and kinematic cuts, we obtain a superior discrimination of the signal (S) over the background (B). In a single year, using the nominal neutrino beam mode, DUNE may achieve S= ffiffiffi ffi B p of 3.3 and 2.3 for the hadronic and leptonic decay channels of the tau respectively. Operating in the tau-optimized beam mode would increase S= ffiffiffi ffi B p to 8.8 and 11 for each of these channels. We premier the use of the analysis software RIVET, a tool ubiquitously used by the LHC experiments, in neutrino physics. For wider accessibility, we provide our analysis code.

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Section: Introductionmentioning

confidence: 99%

Tau neutrinos at DUNE: New strategies, new opportunities

2020

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“…We observe that a fit to the OPERA ν τ events [32] did in Ref. [46] predicted the bound | µτ | 0.41 (marginalising over all parameters including NSI parameters) which is almost a factor of two larger than the worst limit DUNE can set. Table 7: Same as Tab.6 but for a 20% systematic uncertainty for the ν τ appearance channel.…”

Section: Effect Of Systematics Experimental Reach and ν τ Detection mentioning

confidence: 77%

“…We observe that a fit to the OPERA ν τ events [32] did in Ref. [46] predicted the bound | µτ | 0.41 (marginalising over all parameters including NSI parameters) which is almost a factor of two larger than the worst limit DUNE can set. We checked that the other NSI parameters do not benefit so much from the ν τ appearance channel and the sensitivity reach remains roughly the same as in the standard DUNE scenario with ν e appearance and ν µ disappearance only.…”

Section: Effect Of Systematics Experimental Reach and ν τ Detection E...mentioning

confidence: 77%

“…For ∆m 2 31 , instead, an improvement of approximately 30% can be reached passing from the worst case (S/B = 2.45, with ν τ detection efficiency at 6%) to the best one (S/B = 18.6, with ν τ detection efficiency at 18%). Notice that the OPERA experiment measured ∆m 2 31 = (2.7 ± 0.7) × 10 −3 eV 2 [32,46] while the DUNE setup here discussed with an 18% τ detection efficiency reaches a much better relative uncertainty of about 8%.…”

Section: Standard Fluxmentioning

confidence: 81%

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On the role of the ντ appearance in DUNE in constraining standard neutrino physics and beyond

Ghoshal¹,

Giarnetti²,

Meloni³

2019

J. High Energ. Phys.

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We consider the ν µ → ν τ appearance channel in the future Deep Underground Neutrino Experiment (DUNE) which offers a good statistics of the ν τ sample. In order to measure its impact on constraining the oscillation parameters, we consider several assumptions on the efficiency for ν τ charged-current signal events (with subsequent τ → e decay) and the related backgrounds and study the effects of various systematic uncertainties. Two different neutrino fluxes have been considered, namely a CP-violation optimized flux and a ν τ optimized flux.Our results show that the addition of the ν µ → ν τ appearance channel does not reduce the current uncertainties on the standard 3-ν oscillation parameters while it can improve in a significant way the sensitivity to the Non-Standard Interaction parameter | µτ | and to the new mixing angle θ 34 of a sterile neutrino model of the 3 + 1 type.

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“…Despite such difficulties, upcoming multi-purpose neutrino experiments, such as DUNE [14], are well posed to detect tau neutrinos given their large fiducial volume, powerful neutrino beam and exquisite track reconstruction capability. There have been a number of works which explore the tau neutrino sector including pioneering proposals for observing ν τ at beam dump experiments [15] and the subsequent experimental search by NOMAD [16], polarization effects on τ decay products for atmospheric and beam ν τ searches [17][18][19][20][21], optimization of cuts on τ decay products in the DUNE beam neutrino sample [22], tests of unitarity and patterns of leptonic mixing [23][24][25] and beyond the Standard Model physics probes with ν τ measurements [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Tau neutrinos at DUNE: new strategies, new opportunities

Machado,

Schulz,

Turner

2020

Preprint

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We propose a novel analysis strategy, that leverages the unique capabilities of the DUNE experiment, to study tau neutrinos. We integrate collider physics ideas, such as jet clustering algorithms in combination with machine learning techniques, into neutrino measurements. Through the construction of a set of observables and kinematic cuts, we obtain a superior discrimination of the signal (S) over the background (B). In a single year, using the nominal neutrino beam mode, DUNE may achieve S/ √ B of 3.3 and 2.3 for the hadronic and leptonic decay channels of the tau respectively. Operating in the tau-optimized beam mode would increase S/ √ B to 8.8 and 11 for each of these channels. We premier the use of the analysis software Rivet, a tool ubiquitously used by the LHC experiments, in neutrino physics. For wider accessibility, we provide our analysis code.

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Exploring new physics from ν events in OPERA

Abstract: We analyze in details the impact of the 10 ν τ events seen in the OPERA experiment [1] in constraining the Non Standard Interaction parameter ε µτ affecting neutrino propagation in matter and the allowed parameter space of models with one sterile neutrino of the 3 + 1 type.

Cited by 7 publications

References 22 publications

Tau neutrinos at DUNE: New strategies, new opportunities

Tau neutrinos at DUNE: New strategies, new opportunities

On the role of the ντ appearance in DUNE in constraining standard neutrino physics and beyond

Tau neutrinos at DUNE: new strategies, new opportunities

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