Nuclear study of the exotic neutrino interactions

Open neutrino physics issues require precision studies, both theoretical and experimental ones, and towards this aim coherent neutral current neutrino-nucleus scattering events are expected to be observed soon. In this work, we explore ν -nucleus processes from a nuclear theory point of view and obtain results with high confidence level based on accurate nuclear structure cross sections calculations. The present study explores the differential event rates as well as the total number of events expected to be measured by nuclear detectors, indicating measurable rates. We concentrate on the possibility of detecting supernova neutrinos by using massive detectors like those of the GERDA and SuperCDMS dark matter experiments and at spallation neutron source facilities (at Oak Ridge National Lab) by the COHERENT experiment.

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Standard and Nonstandard Neutrino-Nucleus Reactions Cross Sections and Event Rates to Neutrino Detection Experiments

Advances in High Energy Physics ◽

10.1155/2015/763648 ◽

2015 ◽

Vol 2015 ◽

pp. 1-17 ◽

Cited By ~ 30

Author(s):

D. K. Papoulias ◽

T. S. Kosmas

Keyword(s):

Cross Sections ◽

Particle Physics ◽

Point Of View ◽

Oak Ridge ◽

Upper Limits ◽

The Standard Model ◽

Theory Point ◽

Event Rates ◽

Nuclear Detectors ◽

Lepton Flavour

In this work, we exploreν-nucleus processes from a nuclear theory point of view and obtain results with high confidence level based on accurate nuclear structure cross sections calculations. Besides cross sections, the present study includes simulated signals expected to be recorded by nuclear detectors and differential event rates as well as total number of events predicted to be measured. Our original cross sections calculations are focused on measurable rates for the standard model process, but we also perform calculations for various channels of the nonstandard neutrino-nucleus reactions and come out with promising results within the current upper limits of the corresponding exotic parameters. We concentrate on the possibility of detecting (i) supernova neutrinos by using massive detectors like those of the GERDA and SuperCDMS dark matter experiments and (ii) laboratory neutrinos produced near the spallation neutron source facilities (at Oak Ridge National Lab) by the COHERENT experiment. Our nuclear calculations take advantage of the relevant experimental sensitivity and employ the severe bounds extracted for the exotic parameters entering the Lagrangians of various particle physics models and specifically those resulting from the charged lepton flavour violatingμ-→e-experiments (Mu2e and COMET experiments).

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Coherent and incoherent channels of neutrino-nucleus reactions

HNPS Proceedings ◽

10.12681/hnps.2583 ◽

2020 ◽

Vol 16 ◽

pp. 75

Author(s):

P. C. Divari ◽

T. S. Kosmas

Keyword(s):

Cross Sections ◽

Neutral Current ◽

Charged Current ◽

Preliminary Results ◽

Scattering Cross ◽

Neutrino Detection ◽

Intermediate Energies ◽

Nucleus Scattering ◽

Scattering Cross Sections

Inelastic neutrino-nucleus scattering cross sections at low and intermediate energies are investigated for currently interesting nuclei employed in neutrino-detection experiments. This is an extension to charged current processes of our previous QRPA calculations referred to neutral current neutrino/antineutrino-nucleus reactions. Our preliminary results for the reactions 56Fe(νe, e−)56Co and 40Ar(νe, e−)40K compare rather well with similar calculations obtained in the context of continuum RPA.

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Electron-capture modes with realistic nuclear structure calculations

HNPS Proceedings ◽

10.12681/hnps.1997 ◽

2019 ◽

Vol 21 ◽

pp. 4

Author(s):

P. G. Giannaka ◽

T. S. Kosmas

Keyword(s):

Electron Capture ◽

Cross Sections ◽

Nuclear Reactions ◽

Random Phase ◽

Point Of View ◽

Electron Neutrino ◽

Β Decay ◽

Decay Modes ◽

Theory Point ◽

Nuclear Structure Calculations

Nuclear electron capture posses prominent position among other weak interaction processes occuring in explosive nucleosynthesis. In particular, this process plays important role in the core-colapse of massive stars by modifying the electron to baryon ratio Ye. From a nuclear theory point of view, such processes may be studied by using the same nuclear methods (e.g. the quasi-particle random phase approximation, QRPA), employed in the present work with these used for the one-body charge changing nuclear reactions (β-decay modes, charged-current electron-neutrino absorption by nuclei, etc). In this work we calculate e−-capture cross sections on 56Fe using two different approaches. At first, original cross section calculations are perfored by using the pn-QRPA method considering all the accessible transitions of the final nucleus 56Mn. Secondly, we evaluate the Gamow-Teller strength distributions and obtain the cross sections at the limit of zero-momentum transfer. The agreement between the two methods is very good.

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Convolutedν-Signals on114Cd Isotope from Astrophysical and Laboratory Neutrino Sources

Advances in High Energy Physics ◽

10.1155/2015/632131 ◽

2015 ◽

Vol 2015 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Vaitsa Tsakstara

Keyword(s):

Cross Sections ◽

Neutral Current ◽

Random Phase ◽

Intermediate Energy ◽

Double Beta Decay ◽

Quasiparticle Random Phase Approximation ◽

Simulation Techniques ◽

Nucleus Scattering ◽

Reactor Neutrinos ◽

Scattering Cross Sections

At first, we evaluate scattering cross sections of low, and intermediate-energy neutrinos scattered off the114Cd isotope, the most abundant Cd isotope present also in the COBRA detector (CdTe and CdZnTe materials) which aims to search for double beta decay events and neutrino observations at Gran Sasso laboratory (LNGS). The coherentν-nucleus channel addressed here is the dominant reaction channel of the neutral currentν-nucleus scattering. Ourν-nucleus cross sections (calculated with a refinement of the quasiparticle random-phase approximation, QRPA) refer to thegs→gstransitions forν-energiesεν≤100 MeV. Subsequently, simulatedν-signals on114Cd isotope are derived. Towards this purpose, the required folded cross section comes out of simulation techniques by employing several low, and intermediate-energy neutrino distributions of the astrophysicalν-sources, like the solar, supernova, and Earth neutrinos, as well as the laboratory neutrinos, the reactor neutrinos, the pion-muon stopped neutrinos, and theβ-beam neutrinos.

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EFFECT OF STRANGENESS FOR NEUTRINO-NUCLEON AND NEUTRINO-NUCLEUS SCATTERING IN QUASIELASTIC REGION

Modern Physics Letters A ◽

10.1142/s021773230900036x ◽

2009 ◽

Vol 24 (11n13) ◽

pp. 955-959

Author(s):

K. S. KIM ◽

MYUNG-KI CHEOUN ◽

BYUNG GEEL YU

Keyword(s):

Cross Section ◽

Cross Sections ◽

Strange Quark ◽

Neutral Current ◽

Charged Current ◽

Particle Model ◽

Protons And Neutrons ◽

Nucleus Scattering ◽

Single Particle Model ◽

The Cross

We present the neutral-current (NC) and charged-current (CC) reactions by incident neutrino (antineutrino) scattering on the nucleon, and also on the 12 C target in quasi-elastic region within the framework of a relativistic single particle model. Effects of the strangeness are studied on the cross sections, the ratios between the NC and CC reactions, and the asymmetries. We found that there exists some cancellation of the strange quark contributions between the knocked-out protons and neutrons in the neutrino (antineutrino)-nucleus scattering. The effect of the strangeness on the asymmetry exhibits larger than that on the ratio and the cross section.

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Coherent and Incoherent Neutral Current Scattering for Supernova Detection

Advances in High Energy Physics ◽

10.1155/2012/379460 ◽

2012 ◽

Vol 2012 ◽

pp. 1-18 ◽

Cited By ~ 7

Author(s):

P. C. Divari

Keyword(s):

Cross Sections ◽

Neutral Current ◽

Neutrino Energy ◽

Total Cross Sections ◽

Neutrino Scattering ◽

Neutrino Detection ◽

Supernova Neutrino ◽

Dirac Distribution ◽

The Individual ◽

Event Rates

The total cross sections as well as the neutrino event rates are calculated in the neutral current neutrino scattering off40Ar and132Xe isotopes at neutrino energies (Ev<100 MeV). The individual contribution coming from coherent and incoherent channels is taking into account. An enhancement of the neutral current component is achieved via the coherent (0gs+→0gs+) channel which is dominant with respect to incoherent (0gs+→Jf) one. The response of the above isotopes as a supernova neutrino detection has been considered, assuming a two parameter Fermi-Dirac distribution for the supernova neutrino energy spectra. The calculated total cross sections are tested on a gaseous spherical TPC detector dedicated for supernova neutrino detection.

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Neutral-Current Neutrino-Nucleus Scattering off Xe Isotopes

Advances in High Energy Physics ◽

10.1155/2018/9163586 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 9

Author(s):

P. Pirinen ◽

J. Suhonen ◽

E. Ydrefors

Keyword(s):

Nuclear Structure ◽

Cross Sections ◽

Direct Detection ◽

Neutral Current ◽

Random Phase ◽

Solar Neutrinos ◽

Neutrino Energy ◽

Quasiparticle Random Phase Approximation ◽

Nucleus Scattering ◽

Nuclear Structure Calculations

Large liquid xenon detectors aiming for dark matter direct detection will soon become viable tools also for investigating neutrino physics. Information on the effects of nuclear structure in neutrino-nucleus scattering can be important in distinguishing neutrino backgrounds in such detectors. We perform calculations for differential and total cross sections of neutral-current neutrino scattering off the most abundant xenon isotopes. The nuclear-structure calculations are made in the nuclear shell model for elastic scattering and also in the quasiparticle random-phase approximation (QRPA) and microscopic quasiparticle-phonon model (MQPM) for both elastic and inelastic scattering. Using suitable neutrino energy distributions, we compute estimates of total averaged cross sections for 8B solar neutrinos and supernova neutrinos.

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Chemical analysis: Information contribution of results

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19910505 ◽

1991 ◽

Vol 56 (3) ◽

pp. 505-559 ◽

Cited By ~ 7

Author(s):

Karel Eckschlager

Keyword(s):

Analytical Chemistry ◽

Information Theory ◽

Set Theory ◽

Fuzzy Set Theory ◽

Information Gain ◽

Analytical Signal ◽

Point Of View ◽

System A ◽

Review Analysis ◽

Theory Point

In this review, analysis is treated as a process of gaining information on chemical composition, taking place in a stochastic system. A model of this system is outlined, and a survey of measures and methods of information theory is presented to an extent as useful for qualitative or identification, quantitative and trace analysis and multicomponent analysis. It is differentiated between information content of an analytical signal and information gain, or amount of information, obtained by the analysis, and their interrelation is demonstrated. Some notions of analytical chemistry are quantified from the information theory and system theory point of view; it is also demonstrated that the use of fuzzy set theory can be suitable. The review sums up the principal results of the series of 25 papers which have been published in this journal since 1971.

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