Nuclear Theory·nucl-th

Friday·May 17, 2024

12 papers—9 primary·3 cross-listed

10
[Submitted on 16 May 2024] (cross-list from hep-ph)
Probing neutrino-nucleus interaction in DUNE and MicroBooNE
R Lalnuntluanga🇮🇳 · R K Pradhan🇮🇳 · A Giri🇮🇳
The neutrino experiments utilize heavy nuclear targets to achieve high statistics neutrino-nucleus interaction event rate, which leads to systematic uncertainties in the oscillation parameters due to the nuclear effects and uncertainties in the cross-section. Understanding the interaction of neutrinos with the nucleus becomes crucial in determining the oscillation parameters with high precision. We investigate the uncertainty in quasi-elastic interaction due to nuclear effects by selecting exactly 1 proton, 0 pions, and any number of neutrons in the final state in DUNE and MicroBooNE detectors, and the effects on the neutrino oscillation in the DUNE detector. The calorimetric method with this selection can be used for accurate neutrino energy reconstruction in the quasi-elastic channel where the nuclear effects are inevitable.
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
arXiv:
2405.09994 [pdf]
NPB(2024)·3 citations
11
[Submitted on 16 May 2024] (cross-list from nucl-ex)
The 3He(\vec n,p)3H parity-conserving asymmetry
M. Viviani · S. Baeßler · L. Barrón-Palos · N. Birge · J.D. Bowman · J. Calarco · V. Cianciolo · C.E. Coppola · C.B. Crawford · G. Dodson · N. Fomin · I. Garishvili and 19 other authors
Recently, the n $^{3}$ He collaboration reported a measurement of the parity-violating (PV) proton directional asymmetry $A_{PV} = (1.55 \pm 0.97 (st at) \pm 0.24 (sys)) \times 1 0^{- 8}$ in the capture reaction of $^{3}$ He $(n, p)^{3}$ H at meV incident neutron energies. The result increased the limited inventory of precisely measured and calculable PV observables in few-body systems required to further understand the structure of hadronic weak interaction. In this letter, we report the experimental and theoretical investigation of a parity conserving (PC) asymmetry $A_{PC}$ in the same reaction (the first ever measured PC observable at meV neutron energies). As a result of S- and P-wave mixing in the reaction, the $A_{PC}$ is inversely proportional to the neutron wavelength $λ$ . The experimental value is $(λ \times A_{PC}) \equiv β = (- 1.97 \pm 0.28 (stat) \pm 0.12 (sys)) \times 1 0^{- 6}$ Amstrongs. We present results for a theoretical analysis of this reaction by solving the four-body scattering problem within the hyperspherical harmonic method. We find that in the $^{3}$ He $(n, p)^{3}$ H reaction, $A_{PC}$ depends critically on the energy and width of the close $0^{-}$ resonant state of $^{4}$ He, resulting in a large sensitivity to the spin-orbit components of the nucleon-nucleon force and even to the three-nucleon force. The analysis of the accurately measured $A_{PC}$ and $A_{PV}$ using the same few-body theoretical models gives essential information needed to interpret the PV asymmetry in the $^{3}$ He $(n, p)^{3}$ H reaction.
Comments:
8 pages, 3 figures
Subjects:
Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2405.10258 [pdf]
1 citation
12
[Submitted on 16 May 2024] (cross-list from quant-ph)
Corrections to adiabatic behavior for long paths
Thomas D. Cohen🇺🇸 · Hyunwoo Oh🇺🇸
The cost and the error of the adiabatic theorem for preparing the final eigenstate are discussed in terms of path length. Previous studies in terms of the norm of the Hamiltonian and its derivatives with the spectral gap are limited in their ability to describe the cost of adiabatic state preparation for certain physically large systems. We argue that total time is not a good measure for determining the computational difficulty of adiabatic quantum computation by developing a no-go theorem. From the result of time-periodic Hamiltonian cases, we suggest that there are proxies for computational cost which typically grow as path length increases when the error is kept fixed and small and consider possible conjectures on how general the behavior is.
Comments:
11 pages, 0 figures
Subjects:
Quantum Physics (quant-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
2405.10294 [pdf]
PRA(2024)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE

Probing neutrino-nucleus interaction in DUNE and MicroBooNE

The 3He(\vec n,p)3H parity-conserving asymmetry

Corrections to adiabatic behavior for long paths

Affiliations