PT Journal
AU Carrasco, N
   Ciuchini, M
   Dimopoulos, P
   Frezzotti, R
   Gimenez, V
   Lubicz, V
   Rossi, GC
   Sanfilippo, F
   Silvestrini, L
   Simula, S
   Tarantino, C
TI D-0-(D)over-bar(0) mixing in the standard model and beyond from N-f=2 twisted mass QCD
SO Physical Review D
JI Phys. Rev. D
PY 2014
BP 014502
EP 9pp
VL 90
IS 1
DI 10.1103/PhysRevD.90.014502
LA English
AB 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 N-f = 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 D-0 – (D) over bar (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.
ER