Publication details for Mikael ChalaChala, Mikael, Lenz, Alexander, Rusov, Aleksey V. & Scholtz, Jakub (2019). Delta ACP within the Standard Model and beyond. Journal of High Energy Physics 2019(7): 161.
- Publication type: Journal Article
- ISSN/ISBN: 1029-8479 (electronic)
- DOI: 10.1007/JHEP07(2019)161
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
In light of the recent LHCb observation of CP violation in the charm sector, we
review standard model (SM) predictions in the charm sector and in particular for ∆ACP.
We get as an upper bound in the SM |∆ASM
CP| ≤ 3.6 × 10−4
, which can be compared to
the measurement of ∆ALHCb2019
CP = (−15.4 ± 2.9) × 10−4
. We discuss resolving this tension
within an extension of the SM that includes a flavour violating Z
that couples only to ¯ss
and ¯cu. We show that for masses below 80 GeV and flavour violating coupling of the order
, this model can successfully resolve the tension and avoid constraints from dijet
searches, D0 − D
0 mixing and measurements of the Z width.