scholarly journals Running axial mass of the nucleon as a phenomenological tool for calculating quasielastic neutrino–nucleus cross sections

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Igor D. Kakorin ◽  
Konstantin S. Kuzmin ◽  
Vadim A. Naumov
Keyword(s):  
Cross Sections ◽  
Axial Vector ◽  
Neutrino Energy ◽  
Neutrino Interaction ◽  
Charged Current ◽  
Event Generator ◽  
Wide Energy Range ◽  
Final State ◽  
Axial Mass ◽  
Wide Energy

AbstractWe suggest an empirical rule-of-thumb for calculating the cross sections of charged-current quasielastic (CCQE) and CCQE-like interactions of neutrinos and antineutrinos with nuclei. The approach is based on the standard relativistic Fermi-gas model and on the notion of neutrino energy dependent axial-vector mass of the nucleon, governed by a couple of adjustable parameters, one of which is the conventional charged-current axial-vector mass. The inelastic background contributions and final-state interactions are therewith simulated using GENIE 3 neutrino event generator. An extensive comparison of our calculations with earlier and current accelerator CCQE and CCQE-like data for different nuclear targets shows good or at least qualitative overall agreement over a wide energy range. We also discuss some problematical issues common to several competing contemporary models of the CCQE (anti)neutrino–nucleus scattering and to the current neutrino interaction generators.

scholarly journals Cross section calculations for neutrino-nucleus reactions at low and intermediate energies.

2020 ◽  
Vol 15 ◽  
pp. 249
Author(s):  
V. Ch. Chasioti ◽  
T. S. Kosmas ◽  
P. Divari
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Axial Vector ◽  
Random Phase ◽  
Neutrino Energy ◽  
Reaction Cross ◽  
Neutrino Experiment ◽  
Final State ◽  
Quasi Particle ◽  
Intermediate Energies

Inelastic neutrino-nucleus reaction cross sections are studied focusing on the neutral current processes. Particularly, we investigate the angular and initial neutrino-energy dependence of the differential and integrated cross sections for low and intermediate energies of the incoming neutrino (or antineutrino). Contributions coming from both, the vector and axial-vector components of the corresponding hadronic currents have been included. The initial and final state nuclear wave-functions have been calculated in the context of the Quasi-particle Random Phase Approximation (QRPA) tested on the reproducibility of the low-lying energy spectrum (up to about 5 MeV) of the studied nuclei. The results presented here refer to the nuclear isotopes 16O and 98Mo. As it is well known, O plays a significant role in supernova evolution phenomena and Mo is used as a target in the MOON neutrino experiment at Japan.

Computation of Nuclear Reactions with Light-Heavy Ions

1991 ◽  
Vol 02 (01) ◽  
pp. 238-242
Author(s):  
T.L. BELYAEVA ◽  
N.S. ZELENSKAYA
Keyword(s):  
Cross Sections ◽  
Heavy Ions ◽  
Nuclear Reactions ◽  
Transition Amplitude ◽  
Computer Code ◽  
Wide Energy Range ◽  
Final State ◽  
Medium Mass ◽  
Wide Energy ◽  
The Spectator

The computer code OLYMPS for calculation of the inclusive cross sections for nuclear reactions induced by light heavy ions on medium-mass nuclei at beam energies of 10–20 MeV per nucleon is developed. Our calculations are based on the description of the massive transfer reactions in the spectator model. In view of the fact that most of the considered reactions have more than two particles in the final state and require an allowance for the continuum spectrum, the standard distorted wave Born approximation (DWBA) code fails to work. In our method the transition amplitude is witten in a prior-form of exact finite range DWBA and an exact numerical integration over the transfer momentum is carried out. This requires knowledge of the optical potentials between interacting light and heavy ions in a wide energy range. In addition, OLYMPS provides for the alternative ways of calculation of the wave functions of the relative motion of the heavy ions.

A high precision narrow-band neutrino beam: The ENUBET project

2020 ◽  
Vol 35 (34n35) ◽  
pp. 2044017
Author(s):  
M. Torti ◽  
F. Acerbi ◽  
A. Berra ◽  
M. Bonesini ◽  
A. Branca ◽  
...  
Keyword(s):  
Cross Sections ◽  
Narrow Band ◽  
A Priori ◽  
Large Angle ◽  
Neutrino Energy ◽  
Neutrino Interaction ◽  
Neutrino Beam ◽  
Final State ◽  
Long Baseline ◽  
Charged Leptons

The knowledge of the initial flux, energy and flavor of current neutrino beams is the main limitation for a precise measurement of neutrino cross-sections. The ENUBET ERC project is studying a facility based on a narrow-band neutrino beam capable of constraining the neutrino fluxes normalization through the monitoring of the associated charged leptons in an instrumented decay tunnel. In ENUBET, the identification of large-angle positrons from [Formula: see text] decays at single particle level can potentially reduce the [Formula: see text] flux uncertainty at the level of 1%. This setup would allow for an unprecedented measurement of the [Formula: see text] cross-section at the GeV scale. This input would be highly beneficial to reduce the budget of systematic uncertainties in the next long baseline oscillation projects. Furthermore, in narrow-band beams, the transverse position of the neutrino interaction at the detector can be exploited to determine a priori with significant precision the neutrino energy spectrum without relying on the final state reconstruction. This contribution will present the advances in the design and simulation of the hadronic beam line. Special emphasis will be given to a static focusing system of secondary mesons that can be coupled to a slow extraction proton scheme. The consequent reduction of particle rates and pile-up effects makes the determination of the [Formula: see text] flux through a direct monitoring of muons after the hadron dump viable, and paves the way to a time-tagged neutrino beam. Time-coincidences among the lepton at the source and the neutrino at the detector would enable an unprecedented purity and the possibility to reconstruct the neutrino kinematics at source on an event-by-event basis. We will also present the performance of positron tagger prototypes tested at CERN beamlines, a full simulation of the positron reconstruction chain and the expected physics reach of ENUBET.

scholarly journals Measurement of the muon neutrino charged-current cross sections on water, hydrocarbon and iron, and their ratios, with the T2K on-axis detectors

2019 ◽  
Vol 2019 (9) ◽  
Author(s):  
K Abe ◽  
R Akutsu ◽  
A Ali ◽  
C Andreopoulos ◽  
L Anthony ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Laboratory Frame ◽  
Neutrino Energy ◽  
Muon Neutrino ◽  
Neutrino Interaction ◽  
Neutrino Beam ◽  
Charged Current ◽  
Measured Cross Section ◽  
Good Agreement

Abstract We report a measurement of the flux-integrated $\nu_{\mu}$ charged-current cross sections on water, hydrocarbon, and iron in the T2K on-axis neutrino beam with a mean neutrino energy of 1.5 GeV. The measured cross sections on water, hydrocarbon, and iron are $\sigma^{\rm{H_{2}O}}_{\rm{CC}} = (0.840\pm 0.010(\mathrm{stat.})^{+0.10}_{-0.08}(\mathrm{syst.}))\times10^{-38}\,\mathrm{cm}^2$/nucleon, $\sigma^{\rm{CH}}_{\rm{CC}} = (0.817\pm 0.007(\mathrm{stat.})^{+0.11}_{-0.08}(\mathrm{syst.}))\times10^{-38}\,\mathrm{cm}^2$/nucleon, and $\sigma^{\rm{Fe}}_{\rm{CC}} = (0.859\pm 0.003(\mathrm{stat.})^{+0.12}_{-0.10}(\mathrm{syst.}))\times10^{-38}\,\mathrm{cm}^2$/nucleon, respectively, for a restricted phase space of induced muons: $\theta_{\mu}<45^{\circ}$ and $p_{\mu}>$0.4 GeV/$c$ in the laboratory frame. The measured cross section ratios are ${\sigma^{\rm{H_{2}O}}_{\rm{CC}}}/{\sigma^{\rm{CH}}_{\rm{CC}}} = 1.028\pm 0.016(\mathrm{stat.})\pm 0.053(\mathrm{syst.})$, ${\sigma^{\rm{Fe}}_{\rm{CC}}}/{\sigma^{\rm{H_{2}O}}_{\rm{CC}}} = 1.023\pm 0.012(\mathrm{stat.})\pm 0.058(\mathrm{syst.})$, and ${\sigma^{\rm{Fe}}_{\rm{CC}}}/{\sigma^{\rm{CH}}_{\rm{CC}}} = 1.049\pm 0.010(\mathrm{stat.})\pm 0.043(\mathrm{syst.})$. These results, with an unprecedented precision for the measurements of neutrino cross sections on water in the studied energy region, show good agreement with the current neutrino interaction models used in the T2K oscillation analyses.

Differential and integral electron scattering cross sections from tetrahydrofuran (THF) over a wide energy range: 1–10 000 eV

2014 ◽  
Vol 68 (6) ◽  
Author(s):  
Martina C. Fuss ◽  
Ana G. Sanz ◽  
Francisco Blanco ◽  
Paulo Limão-Vieira ◽  
Michael J. Brunger ◽  
...  
Keyword(s):  
Energy Range ◽  
Electron Scattering ◽  
Cross Sections ◽  
Wide Energy Range ◽  
Scattering Cross ◽  
Wide Energy ◽  
Scattering Cross Sections

Channel-specific dielectronic recombination of Ge(XXXII), Se(XXXIV), and Kr(XXXVI)

2004 ◽  
Vol 82 (4) ◽  
pp. 277-289 ◽  
Author(s):  
G El Machtoub
Keyword(s):  
High Temperature ◽  
Energy Range ◽  
Cross Sections ◽  
Emission Spectra ◽  
Dielectronic Recombination ◽  
Wide Energy Range ◽  
Wide Energy

We present explicit calculations of channel-specific dielectronic recombination cross sections for hydrogen-like germanium, Ge(XXXII); selenium, Se(XXXIV); and krypton, Kr(XXXVI). The convoluted cross sections characterize K-shell emission spectra over a wide energy range where contributions from high-n (n = 2–10), satellite lines are included. The high-n contributions presented are important for better diagnostics in the domain of high-temperature plasmas. PACS Nos.: 32.30.Rj, 32.70.Rm, 34.70.te

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