D0-D ¯0 mixing in the standard model and beyond from Nf=2 twisted mass QCD
Abstract
We present the first unquenched lattice QCD results for the bag parameters controlling the short distance contribution to D meson oscillations in the standard model and beyond. We have used the gauge configurations produced by the European Twisted Mass collaboration with Nf=2 dynamical quarks, at four lattice spacings and light meson masses in the range 280-500 MeV. Renormalization is carried out nonperturbatively with the regularization-independent momentum subtraction method. The bag-parameter results have been used to constrain new physics effects in D0-D ¯0 mixing, to put a lower bound to the generic new physics scale and to constrain off-diagonal squark mass terms for TeV-scale supersymmetry.
- Publication:
-
Physical Review D
- Pub Date:
- July 2014
- DOI:
- 10.1103/PhysRevD.90.014502
- arXiv:
- arXiv:1403.7302
- Bibcode:
- 2014PhRvD..90a4502C
- Keywords:
-
- 12.38.Gc;
- 12.60.-i;
- 14.40.Lb;
- Lattice QCD calculations;
- Models beyond the standard model;
- Charmed mesons;
- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology
- E-Print:
- 18 pages, 4 figures, 10 tables, updated to match the version accepted for publication in Physical Review D. This article draws form arXiv:1308.1851 which is on B-Bbar mixing instead of D-Dbar mixing