Nuclear Theory·nucl-th

Friday·March 31, 2023

10 papers—5 primary·5 cross-listed

06
Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment
DUNE Collaboration: A. Abed Abud · B. Abi · R. Acciarri · M. A. Acero · M. R. Adames · G. Adamov · M. Adamowski · D. Adams · M. Adinolfi · C. Adriano · A. Aduszkiewicz · J. Aguilar and 1306 other authors
A primary goal of the upcoming Deep Underground Neutrino Experiment (DUNE) is to measure the $O (10)$ MeV neutrinos produced by a Galactic core-collapse supernova if one should occur during the lifetime of the experiment. The liquid-argon-based detectors planned for DUNE are expected to be uniquely sensitive to the $ν_{e}$ component of the supernova flux, enabling a wide variety of physics and astrophysics measurements. A key requirement for a correct interpretation of these measurements is a good understanding of the energy-dependent total cross section $σ (E_{ν})$ for charged-current $ν_{e}$ absorption on argon. In the context of a simulated extraction of supernova $ν_{e}$ spectral parameters from a toy analysis, we investigate the impact of $σ (E_{ν})$ modeling uncertainties on DUNE's supernova neutrino physics sensitivity for the first time. We find that the currently large theoretical uncertainties on $σ (E_{ν})$ must be substantially reduced before the $ν_{e}$ flux parameters can be extracted reliably: in the absence of external constraints, a measurement of the integrated neutrino luminosity with less than 10\% bias with DUNE requires $σ (E_{ν})$ to be known to about 5%. The neutrino spectral shape parameters can be known to better than 10% for a 20% uncertainty on the cross-section scale, although they will be sensitive to uncertainties on the shape of $σ (E_{ν})$ . A direct measurement of low-energy $ν_{e}$ -argon scattering would be invaluable for improving the theoretical precision to the needed level.
↳ hep-exhep-phnucl-thPRD(2023)·31 citations
07
Hot QCD White Paper
M. Arslandok🇺🇸 · S. A. Bass🇺🇸 · A. A. Baty🇺🇸 · I. Bautista🇲🇽 · C. Beattie🇺🇸 · F. Becattini🇮🇹 · R. Bellwied🇺🇸 · Y. Berdnikov🇷🇺 · A. Berdnikov🇷🇺 · J. Bielcik🇨🇿 · J. T. Blair🇺🇸 · F. Bock🇺🇸 and 162 other authors
Hot QCD physics studies the nuclear strong force under extreme temperature and densities. Experimentally these conditions are achieved via high-energy collisions of heavy ions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). In the past decade, a unique and substantial suite of data was collected at RHIC and the LHC, probing hydrodynamics at the nucleon scale, the temperature dependence of the transport properties of quark-gluon plasma, the phase diagram of nuclear matter, the interaction of quarks and gluons at different scales and much more. This document, as part of the 2023 nuclear science long range planning process, was written to review the progress in hot QCD since the 2015 Long Range Plan for Nuclear Science, as well as highlight the realization of previous recommendations, and present opportunities for the next decade, building on the accomplishments and investments made in theoretical developments and the construction of new detectors. Furthermore, this document provides additional context to support the recommendations voted on at the Joint Hot and Cold QCD Town Hall Meeting, which are reported in a separate document.
↳ nucl-exhep-exhep-phnucl-th124 citations
08
Examination of cluster production in excited light systems at Fermi energies from new experimental data and comparison with transport model calculations
C. Frosin🇮🇹 · S. Piantelli🇮🇹 · G. Casini🇮🇹 · A. Ono🇯🇵 · A. Camaiani🇧🇪 · L. Baldesi🇮🇹 · S. Barlini🇮🇹 · B. Borderie🇫🇷 · R. Bougault🇫🇷 · C. Ciampi🇮🇹 · M. Cicerchia🇮🇹 · A. Chbihi🇫🇷 and 35 other authors
Four different reactions, $^{32}$ S+ $^{12}$ C and $^{20}$ Ne+ $^{12}$ C at 25 and 50 MeV/nucleon, have been measured with the FAZIA detector capable of full isotopic identification of most forward emitted reaction products. Fragment multiplicities, angular distributions and energy spectra have been measured and compared with Monte Carlo simulations, i.e. the antisymmetrized molecular dynamics (AMD) and the heavy-ion phase space exploration (HIPSE) models. These models are combined with two different afterburner codes (HF $l$ and SIMON) to describe the decay of the excited primary fragments. In the case of AMD, the effect of including the clustering and inter-clustering processes to form bound particles and fragments is discussed. A clear confirmation of the role of cluster aggregation in the reaction dynamics and particle production for these light systems, for which the importance of the clustering process increases with bombarding energy, is obtained.
↳ nucl-exnucl-thPRC(2023)·24 citations
09
Constraining a relativistic mean field model using neutron star mass-radius measurements I: Nucleonic models
Chun Huang🇨🇳 · Geert Raaijmakers🇳🇱 · Anna L. Watts🇳🇱 · Laura Tolos🇪🇸 · Constança Providência🇵🇹
Measurements of neutron star mass and radius or tidal deformability deliver unique insight into the equation of state (EOS) of cold dense matter. EOS inference is very often done using generalized parametric or non-parametric models which deliver no information on composition. In this paper we consider a microscopic nuclear EOS model based on a field theoretical approach. We show that current measurements from NICER and gravitational wave observations constrain primarily the symmetric nuclear matter EOS. We then explore what could be delivered by measurements of mass and radius at the level anticipated for future large-area X-ray timing telescopes. These should be able to place very strong limits on the symmetric nuclear matter EOS, in addition to constraining the nuclear symmetry energy that determines the proton fraction inside the neutron star.
↳ astro-ph.HEastro-ph.SRnucl-thMNRAS(2024)·70 citations
10
Small- $x$ Quark and Gluon Helicity Contributions to the Proton Spin Puzzle
Yossathorn Tawabutr🇫🇮
A small- $x$ helicity evolution has been derived in 2016-18 and received an important modification in 2022. This article discusses its general framework and summarizes the recent theoretical developments, including the asymptotic behaviors of helicity PDFs and $g_{1}$ structure function at small $x$ . The latest fits to various polarized scattering data are also discussed. The results from this research program will provide important theoretical inputs for the future polarized small- $x$ measurements at the electron-ion collider (EIC).
↳ hep-phhep-exnucl-exnucl-thActa Phys.Polon.Supp.(2023)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE

Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment

Hot QCD White Paper

Examination of cluster production in excited light systems at Fermi energies from new experimental data and comparison with transport model calculations

Constraining a relativistic mean field model using neutron star mass-radius measurements I: Nucleonic models

Small-x Quark and Gluon Helicity Contributions to the Proton Spin Puzzle

Affiliations

Small- $x$ Quark and Gluon Helicity Contributions to the Proton Spin Puzzle