English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Discrepancy between experimental and theoretical ß-decay rates resolved from first principles

Gysbers, P., Hagen, G., Holt, J. D., Jansen, G. R., Morris, T. D., Navratil, P., et al. (2019). Discrepancy between experimental and theoretical ß-decay rates resolved from first principles. Nature Physics, 15, 428-431. doi:10.1038/s41567-019-0450-7.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0004-F253-D Version Permalink: http://hdl.handle.net/21.11116/0000-0004-F254-C
Genre: Journal Article

Files

show Files
hide Files
:
1903.00047.pdf (Preprint), 2MB
Name:
1903.00047.pdf
Description:
File downloaded from arXiv at 2019-10-30 10:44
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show
hide
Locator:
https://doi.org/10.1038/s41567-019-0450-7 (Publisher version)
Description:
-

Creators

show
hide
 Creators:
Gysbers, P., Author
Hagen, G., Author
Holt, J. D., Author
Jansen, G. R., Author
Morris, T. D., Author
Navratil, P., Author
Papenbrock, T., Author
Quaglioni, S., Author
Schwenk, A.1, Author              
Stroberg, S. R., Author
Wendt, K. A., Author
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              

Content

show
hide
Free keywords: Nuclear Theory, nucl-th
 MPINP: Starke Wechselwirkung und exotische Kerne – Abteilung Blaum
 Abstract: $\beta$-decay, a process that changes a neutron into a proton (and vice versa), is the dominant decay mode of atomic nuclei. This decay offers a unique window to physics beyond the standard model, and is at the heart of microphysical processes in stellar explosions and the synthesis of the elements in the Universe. For 50 years, a central puzzle has been that observed $\beta$-decay rates are systematically smaller than theoretical predictions. This was attributed to an apparent quenching of the fundamental coupling constant $g_A \simeq $ 1.27 in the nucleus by a factor of about 0.75 compared to the $\beta$-decay of a free neutron. The origin of this quenching is controversial and has so far eluded a first-principles theoretical understanding. Here we address this puzzle and show that this quenching arises to a large extent from the coupling of the weak force to two nucleons as well as from strong correlations in the nucleus. We present state-of-the-art computations of $\beta$-decays from light to heavy nuclei. Our results are consistent with experimental data, including the pioneering measurement for $^{100}$Sn. These theoretical advances are enabled by systematic effective field theories of the strong and weak interactions combined with powerful quantum many-body techniques. This work paves the way for systematic theoretical predictions for fundamental physics problems. These include the synthesis of heavy elements in neutron star mergers and the search for neutrino-less double-$\beta$-decay, where an analogous quenching puzzle is a major source of uncertainty in extracting the neutrino mass scale.

Details

show
hide
Language(s):
 Dates: 2019-03-11
 Publication Status: Published online
 Pages: 20 pages, 18 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 1903.00047
DOI: 10.1038/s41567-019-0450-7
URI: http://arxiv.org/abs/1903.00047
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Nature Pub. Group
Pages: - Volume / Issue: 15 Sequence Number: - Start / End Page: 428 - 431 Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850