We consider the role of precision measurements of beta decays and light meson semi-leptonic decays in probing physics beyond the Standard Model in the LHC era. We describe all low-energy charged-current processes within and beyond the Standard Model using an effective field theory framework. We first discuss the theoretical hadronic input which in these precision tests plays a crucial role in setting the baseline for new physics searches. We then review the current and upcoming constraints on the various non-standard operators from the study of decay rates, spectra, and correlations in a broad array of light-quark systems. We finally discuss the interplay with LHC searches, both within models and in an effective theory approach. Our discussion illustrates the independent yet complementary nature of precision beta decay measurements as probes of new physics, showing them to be of continuing importance throughout the LHC era.
|Number of pages||26|
|Journal||Progress in Particle and Nuclear Physics|
|State||Published - Jul 2013|
Bibliographical noteFunding Information:
We thank Michael Ramsey-Musolf for carefully reading the manuscript and Martín González-Alonso and Alejandro Garcia for discussions and correspondence. We also thank Doug Bryman, Geoffry Greene, Brad Plaster, and Fred Wietfeldt for comments on the manuscript. The work of BRH is supported in part by the National Science Foundation under grant PHY-0855119 . SG acknowledges partial support from the US Department of Energy under contract DE-FG02-96ER40989 . The work of VC is supported by the US Department of Energy and the LDRD program at Los Alamos National Laboratory .
- Beta decays
- Physics beyond the Standard Model
- Symmetry tests
ASJC Scopus subject areas
- Nuclear and High Energy Physics