D0 - (D)over-bar0 mixing in the standard model and beyond from Nf=2 twisted mass QCD

被引：37

作者：

Carrasco, N. ^{[1
]}

Ciuchini, M. ^{[1
]}

Dimopoulos, P. ^{[3
,4
,5
]}

Frezzotti, R. ^{[3
,6
]}

Gimenez, V. ^{[7
,8
]}

Lubicz, V. ^{[1
,2
]}

Rossi, G. C. ^{[3
,6
]}

Sanfilippo, F. ^{[10
]}

Silvestrini, L. ^{[9
]}

Simula, S. ^{[1
]}

Tarantino, C. ^{[1
,2
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy

[2] Univ Roma Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy

[3] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[4] Compendio Viminale, Ctr Fermi Museo Storico Fis, I-00184 Rome, Italy

[5] Compendio Viminale, Ctr Studi & Ric Enrico Fermi, I-00184 Rome, Italy

[6] Ist Nazl Fis Nucl, Sez Tor Vergata, I-00133 Rome, Italy

[7] Univ Valencia, CSIC, Dept Fis Teor, E-46100 Valencia, Spain

[8] Univ Valencia, CSIC, IFIC, E-46100 Valencia, Spain

[9] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[10] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 01期

基金：

欧洲研究理事会;

关键词：

CONSTRAINTS; LATTICE; FCNC; SYMMETRY; FERMIONS; PHYSICS;

D O I：

10.1103/PhysRevD.90.014502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：9

共 58 条

[41] TeV scale left-right symmetry and flavor changing neutral Higgs effects [J].