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D-0-(D)over-bar(0) mixing in the standard model and beyond from N-f=2 twisted mass QCD

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D-0-(D)over-bar(0) mixing in the standard model and beyond from N-f=2 twisted mass QCD

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Carrasco Vela, Nuria; Ciuchini, M.; Dimopoulos, P.; Frezzotti, R.; Giménez Gómez, Vicente; Lubicz, V.; Rossi, G.C.; Sanfilippo, F.; Silvestrini, L.; Simula, S.; Tarantino, C.

Aquest document és un/a article, creat/da en: 2014

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.

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