Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Girrbach, Jennifer"'
The experimental value for the isospin amplitude Re(A_2) in K->pi pi decays has been successfully explained within the Standard Model, both within large N approach to QCD and by QCD lattice calculations. On the other hand in both approaches the theor
Externí odkaz:
http://arxiv.org/abs/1404.3824
We investigate how the 331 models face new data on B_{s,d}->mu^+mu^- and B_d->K^*mu^+mu^- taking into account present constraints from Delta F=2 observables, low energy precision measurements, LEP-II and the LHC data. In these models new flavour viol
Externí odkaz:
http://arxiv.org/abs/1311.6729
Autor:
Buras, Andrzej J., Girrbach, Jennifer
Publikováno v:
JHEP12 (2013) 009
In view of the recent improved data on B_{s,d}->mu^+ mu^- and B_d->K^*mu^+mu^- we revisit two simple NP scenarios in which new FCNC currents in b->s mu^+ mu^- transitions are mediated either entirely by a neutral heavy gauge boson Z' with purely LH c
Externí odkaz:
http://arxiv.org/abs/1309.2466
Autor:
Buras, Andrzej J., Girrbach, Jennifer
Publikováno v:
Rep. Prog. Phys. 77 (2014) 086201
We outline a systematic strategy which should help in this decade to identify New Physics beyond the Standard Model by means of quark flavour violating processes and thereby to extend the picture of short distance physics down to the scales as short
Externí odkaz:
http://arxiv.org/abs/1306.3775
Autor:
Girrbach, Jennifer
The coming flavour precision era will allow to uncover various patterns of flavour violation in different New Physics scenarios. We discuss different classes of them. A simple extension of the Standard Model that generally introduces new sources of f
Externí odkaz:
http://arxiv.org/abs/1305.4771
Autor:
Buras, Andrzej J., Girrbach, Jennifer
Publikováno v:
The European Physical Journal C, volume 73, number 9, pages 1-14, year 2013
New Physics contributions to Delta F=2 transitions in models with constrained Minimal Flavour Violation (CMFV), are parametrized by a single variable S(v), the value of the real box diagram function. With already precise experimental values of epsilo
Externí odkaz:
http://arxiv.org/abs/1304.6835
Publikováno v:
JHEP 1307 (2013) 77
The B_s to mu+ mu- decay plays an outstanding role in tests of the Standard Model and physics beyond it. The LHCb collaboration has recently reported the first evidence for this decay at the 3.5 sigma level, with a branching ratio in the ballpark of
Externí odkaz:
http://arxiv.org/abs/1303.3820
Publikováno v:
JHEP 1306 (2013) 111
In many extensions of the Standard Model flavour changing neutral current processes can be mediated by tree-level heavy neutral scalars and/or pseudo-scalars H^0(A^0). This generally introduces new sources of flavour violation and CP violation as wel
Externí odkaz:
http://arxiv.org/abs/1303.3723
We present a detailed study of Delta F=2 observables and of rare K^+(K_L) and B_{s,d} meson decays in a "Minimal Theory of Fermion Masses" (MTFM). In this theory Yukawa couplings are generated through the mixing with heavy vectorlike (VF) fermions. T
Externí odkaz:
http://arxiv.org/abs/1301.5498
The simplest extension of the SM that generally introduces new sources of flavour and CP violation as well as right-handed currents is the addition of a U(1) gauge symmetry to the SM gauge group. If the corresponding heavy gauge boson Z' mediates FCN
Externí odkaz:
http://arxiv.org/abs/1211.1896