D-Dbar mixings from nonlocal condensate contributions

Melic, Blazenka; Lovro, Dulibic; Alexey, Petrov (2025) D-Dbar mixings from nonlocal condensate contributions. In: Proceedings of Science. Trieste, SISSA, .

PDF - Published Version - article Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (908kB)

Abstract

A significant discrepancy, spanning multiple orders of magnitude, exists between the leading order contribution to the DD mixing parameters and experimental values. This is largely due to the Glashow–Iliopoulos–Maiani (GIM) mechanism, which results in substantial suppression of the theoretical predictions. To bridge this gap, various efforts have been made to account for higher-order terms and nonperturbative effects, which, although suppressed in the operator product expansion (OPE), could potentially lead to a larger contribution by weakening the GIM cancellation through flavour SU(3) symmetry breaking. In this work, we compute the long- distance contributions of nonlocal QCD condensates within different models and, for the first time, determine the impact of the mixed condensate. Although our results still fall short of the experimental value, they represent an improvement over current theoretical estimates by an order of magnitude.

Item Type:	Conference or workshop item published in conference proceedings (UNSPECIFIED)
Uncontrolled Keywords:	flavor physics; heavy quarks; charm meson mixing; nonlocal condensates
Subjects:	NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Theoretical Physics Division
Depositing User:	Lorena Palameta
Date Deposited:	27 May 2025 08:14
URI:	http://fulir.irb.hr/id/eprint/9837
DOI:	10.22323/1.476.0413

Actions (login required)

View Item