Halo effective field theory constrains the solar Beryllium-7 + proton -> Boron-8 + photon rate

Abstract

We report an improved low-energy extrapolation of the cross section for the process Beryllium-7+proton -> Boron-8+photon, which determines the Boron-8 neutrino flux from the Sun. Our extrapolant is derived from Halo Effective Field Theory (EFT) at next-to-leading order. We apply Bayesian methods to determine the EFT parameters and the low-energy S-factor, using measured cross sections and scattering lengths as inputs. Asymptotic normalization coefficients of Boron-8 are tightly constrained by existing radiative capture data, and contributions to the cross section beyond external direct capture are detected in the data at E < 0.5 MeV. Most importantly, the S-factor at zero energy is constrained to be S(0)= 21.3 + - 0.7 eV b, which is an uncertainty smaller by a factor of two than previously recommended. That recommendation was based on the full range for S(0) obtained among a discrete set of models judged to be reasonable. In contrast, Halo EFT subsumes all models into a controlled low-energy approximant, where they are characterized by nine parameters at next-to-leading order. These are fit to data, and marginalized over via Monte Carlo integration to produce the improved prediction for S(E).

7 pages, 3 figures, 2 tables, and 1 supplemental material

References in corpus (8)

• Quantifying truncation errors in effective field theory
• alpha-alpha Scattering in Halo Effective Field Theory
• Universal properties and structure of halo nuclei
• Asymptotic normalization coefficients from ab initio calculations
• Bayesian Methods for Parameter Estimation in Effective Field Theories
• Radiative Neutron Capture on Lithium-7
• Causality constraints for charged particles
• Constraining Low-Energy Proton Capture on Beryllium-7 through Charge Radius Measurements

Cited by in corpus (33)

• Nuclear effective field theory: status and perspectives
• A new Generation of Standard Solar Models
• Machine Learning in Nuclear Physics
• Effective field theory description of halo nuclei
• Bayesian parameter estimation for effective field theories
• Eigenvector Continuation as an Efficient and Accurate Emulator for Uncertainty Quantification
• Get on the BAND Wagon: A Bayesian Framework for Quantifying Model Uncertainties in Nuclear Dynamics
• Efficient emulators for scattering using eigenvector continuation
• Bayesian Estimation of Thermonuclear Reaction Rates
• Can nuclear physics explain the anomaly observed in the internal pair production in the Beryllium-8 nucleus?
• Nuclear Forces for Precision Nuclear Physics -- a collection of perspectives
• Performing Bayesian analyses with AZURE2 using BRICK: an application to the ${}^7$Be system
• Can a protophobic vector boson explain the ATOMKI anomaly?
• $S$-factor and scattering-parameter extractions from ${}^3\mathrm{He}+{}^4\mathrm{He}\to {}^7\mathrm{Be}+\gamma$
• Ab initio calculations of low-energy nuclear scattering using confining potential traps
• Ab initio informed evaluation of the radiative capture of protons on ${}^7$Be
• Solar fusion III: New data and theory for hydrogen-burning stars
• The effects of a revised ${}^7$Be e${}^{-}$-capture rate on solar neutrino fluxes
• Models, measurements, and effective field theory: proton capture on Beryllium-7 at next-to-leading order
• Universal physics of bound states of a few charged particles
• $\beta$-delayed proton emission from ${}^{11}$Be in effective field theory
• Constraining the ${}^7$Be($p,\gamma$)${}^8$B $S$-factor with the new precise ${}^7$Be solar neutrino flux from Borexino
• A Bayesian analysis of light-front models and the nucleon's charmed sigma term
• Three-body systems in physics of cold atoms and halo nuclei
• Astrophysical S factor and rate of ${}^7\mathrm{Be}(p,\gamma {)}^8\mathrm{B}$ direct capture reaction in a potential model
• $Z_{cs}(3985)$ in next-to-leading-order chiral effective field theory -- the first truncation uncertainty analysis
• Corrections to nucleon capture cross sections computed in truncated Hilbert spaces
• Coupled-channels treatment of ${}^7\mathrm{Be}(p,\gamma {)}^8\mathrm{B}$ in effective field theory
• What hath Weinberg wrought? Reflections on what Weinberg's papers on 'Nuclear Forces from Chiral Lagrangians' did and did not accomplish
• Radiative proton capture on ${}^{15}\mathrm{N}$ within effective field theory
• Perspectives on few-body cluster structures in exotic nuclei
• Finite-Size Effects in Heavy Halo Nuclei from Effective Field Theory
• A study of the fine-structure constant dependence of radiative capture in Halo-EFT