Nonperturbative dynamics in D-meson mixing

Dulibić, Lovro; Melić, Blaženka; Petrov, Alexey A. (2025) Nonperturbative dynamics in D-meson mixing. Journal of High Energy Physics, 2025 (12). ISSN 1029-8479

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Abstract

Theoretical predictions for the D0D0 mixing parameters fall significantly short of experimental measurements, with discrepancies spanning several orders of magnitude. This gap is mainly due to the Glashow-Iliopoulos-Maiani (GIM) mechanism, which suppresses leading-order contributions by high powers of ms/mc. However, higher-order corrections and nonperturbative effects could reduce this suppression, especially through flavor SU(3)F symmetry breaking. In this work, we investigate the long-distance contributions from QCD condensates, including, for the first time, the effects of mixed quark-gluon and four-quark condensates. Assuming factorization, our results show an increase in the predicted values of D0D0 mixing parameters by two orders of magnitude compared to perturbative NLO result, providing valuable insights into nonperturbative QCD dynamics. Although the theoretical estimates still fall below experimental values, this study represents an important step toward narrowing the gap between theory and observation, highlighting the significance of higher-order 1/mc QCD effects in understanding D0D0 mixing.

Item Type:	Article
Uncontrolled Keywords:	Charm Flavour Violation; Flavour Symmetries; Hadronic Matrix Elements and Weak Decays; Standard Model Parameters
Subjects:	NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Neperturbativni QCD u fizici teških okusa Blaženka Melić IP-2024-05-4427 HRZZ
Depositing User:	Ema Buhin Šaler
Date Deposited:	27 Feb 2026 11:31
URI:	http://fulir.irb.hr/id/eprint/11288
DOI:	10.1007/jhep12(2025)112

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