scholarly journals SEMI-CONTAINED NEUTRINO EVENTS IN MACRO

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 730-732
Author(s):  
R. NOLTY
Keyword(s):  
Low Energy ◽  
Neutrino Interactions ◽  
Energy Formula

Updated results are presented of low-energy [Formula: see text] neutrino interactions observed by the MACRO detector. Two analyses (of different topologies) are presented; individually, and especially in their ratio, they are inconsistent with no oscillations and consistent with maximal mixing at Δm2 of a few times 10-3.

Low Energy Neutrino Interactions

1982 ◽  
pp. 241-257
Author(s):  
Henry W. Sobel ◽  
Frederick Reines ◽  
Elaine Pasierb
Keyword(s):  
Low Energy ◽  
Neutrino Interactions ◽  
Energy Neutrino

scholarly journals Searching for cavities of various densities in the Earth’s crust with a low-energy ν̄e β-beam

2015 ◽  
Vol 30 (29) ◽  
pp. 1550146 ◽  
Author(s):  
C. A. Argüelles ◽  
M. Bustamante ◽  
A. M. Gago
Keyword(s):  
Low Energy ◽  
Earth’S Crust ◽  
Mineral Deposits ◽  
Charge Accumulation ◽  
Confidence Levels ◽  
Long Baseline ◽  
Energy Formula ◽  
Deep Underground ◽  
Earth's Crust ◽  
O 10

We propose searching for deep underground cavities of different densities in the Earth’s crust using a long-baseline [Formula: see text] disappearance experiment, realized through a low-energy [Formula: see text]-beam with highly-enhanced luminosity. We focus on four cases: cavities with densities close to that of water, iron-banded formations, heavier mineral deposits, and regions of abnormal charge accumulation that have been posited to appear prior to the occurrence of an intense earthquake. The sensitivity to identify cavities attains confidence levels (C.L.s) higher than [Formula: see text] and [Formula: see text] for exposure times of three months and 1.5 years, respectively, and cavity densities below [Formula: see text] or above [Formula: see text], with widths greater than 200 km. We reconstruct the cavity density, width, and position, assuming one of them known while keeping the other two free. We obtain large allowed regions that improve as the cavity density differs more from the Earth’s mean density. Furthermore, we demonstrate that the knowledge of the cavity density is important to obtain O(10%) error on the width. Finally, we introduce an observable to quantify the presence of a cavity by changing the orientation of the [Formula: see text] beam, with which we are able to identify the presence of a cavity at the [Formula: see text] to [Formula: see text] C.L.

scholarly journals Constraints on the charged currents in general neutrino interactions with sterile neutrinos

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Tong Li ◽  
Xiao-Dong Ma ◽  
Michael A. Schmidt
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Neutral Current ◽  
New Physics ◽  
Effective Field ◽  
Lepton Number ◽  
Low Energy ◽  
Electroweak Scale ◽  
Sterile Neutrinos ◽  
Neutrino Interactions

Abstract In this work we investigate the implication of low-energy precision measurements on the quark-lepton charged currents in general neutrino interactions with sterile neutrinos in effective field theories. The physics in low-energy measurements is described by the low-energy effective field theory extended with sterile neutrinos (LNEFT) defined below the electroweak scale. We also take into account renormalization group running and match the LNEFT onto the Standard Model (SM) effective field theory with sterile neutrinos (SMNEFT) to constrain new physics (NP) above the electroweak scale. The most sensitive low-energy probes are from leptonic decays of pseudoscalar mesons and hadronic tau lepton decays in terms of precise decay branching fractions, the lepton flavor universality and the Cabibbo-Kobayashi-Maskawa (CKM) unitarity. We also consider other constraints including nuclear beta decay. The constraints on charged current operators are generally stronger than the ones for quark-neutrino neutral current operators. We find that the most stringent bounds on the NP scale of lepton-number-conserving and lepton- number-violating operators in SMNEFT are 74 (110) TeV and 9.8 (13) TeV, respectively, for the operators with down (strange) quark.

scholarly journals Non-standard neutrino interactions and low energy experiments

2019 ◽  
Vol 2019 (9) ◽  
Author(s):  
Wolfgang Altmannshofer ◽  
Michele Tammaro ◽  
Jure Zupan
Keyword(s):  
Low Energy ◽  
Neutrino Interactions
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