Journal article 890 views 110 downloads
Dilaton potential and lattice data
Physical Review D, Volume: 101, Issue: 7
Swansea University Author:
Maurizio Piai
-
PDF | Version of Record
Released under the terms of a Creative Commons Attribution 4.0 International license (CC-BY).
Download (1.12MB)
DOI (Published version): 10.1103/physrevd.101.075025
Abstract
We study an effective field theory (EFT) describing the interaction of an approximate dilaton with a set of pseudo-Nambu-Goldstone bosons (pNGBs). The EFT is inspired by, and employed to analyse, recent results from lattice calculations that reveal the presence of a remarkably light singlet scalar p...
Published in: | Physical Review D |
---|---|
ISSN: | 2470-0010 2470-0029 |
Published: |
American Physical Society (APS)
2020
|
Online Access: |
Check full text
|
URI: | https://cronfa.swan.ac.uk/Record/cronfa53857 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Abstract: |
We study an effective field theory (EFT) describing the interaction of an approximate dilaton with a set of pseudo-Nambu-Goldstone bosons (pNGBs). The EFT is inspired by, and employed to analyse, recent results from lattice calculations that reveal the presence of a remarkably light singlet scalar particle. We adopt a simple form for the scalar potential for the EFT, which interpolates among earlier proposals. It describes departures from conformal symmetry, by the insertion of a single operator at leading order in the EFT. To fit the lattice results, the global internal symmetryis explicitly broken, producing a common mass for the pNGBs, as well as a further, additive deformation of the scalar potential. We discuss sub-leading corrections arising in the EFT from quantum loops. From lattice measurements of the scalar and pNGB masses and of the pNGB decay constant, we extract model parameter values, including those that characterise the scalar potential.The result includes the possibility that the conformal deformation is clearly non-marginal. The extrapolated values for the decay constants and the scalar mass would then be not far below thecurrent lattice-determined values. |
---|---|
Issue: |
7 |