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Related papers: A Lower Bound on sin 2\beta from Minimal Flavour V…

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We discuss corrections to $\Delta M_{B_d}$, $\Delta M_{B_s}$ and to the CP violation parameter $\epsilon$ in two examples of (generalized) minimal flavour violation models: 2HDM and MSSM in the large $\tan\beta$ limit. We show that for…

High Energy Physics - Phenomenology · Physics 2017-08-23 Janusz Rosiek

The measurement of $\sin 2 \beta$ is discussed within and beyond the standard model. In the presence of new physics, the angle $\beta$ extracted from the global fit(denoted by $\beta^{SM}_{fit}$) and the one extracted from $B\to J/\psi K_S$…

High Energy Physics - Phenomenology · Physics 2014-11-17 Yue-Liang Wu , Yu-Feng Zhou

We present formulae for the mass differences $\Delta M_d$ and $\Delta M_s$ in the \BBds systems and for the CP violation parameter $\epsilon$ which are valid in minimal flavour violation models giving rise to new four-fermion $\Delta F=2$…

High Energy Physics - Phenomenology · Physics 2010-05-28 Andrzej J. Buras , Piotr H. Chankowski , Janusz Rosiek , Lucja Slawianowska

We explore the would-be consequences of a low value of the CP-violating phase $\sin2\beta_{\psi K}$. The importance of a reference triangle obtained from measurements that are independent of $B$--$\bar B$ and $K$--$\bar K$ mixing is…

High Energy Physics - Phenomenology · Physics 2010-11-23 Alexander L. Kagan , Matthias Neubert

Rather than sticking to the full $U(3)^3$ approximate symmetry normally invoked in Minimal Flavour Violation, we analyze the consequences on the current flavour data of a suitably broken $U(2)^3$ symmetry acting on the first two generations…

High Energy Physics - Phenomenology · Physics 2011-10-26 Riccardo Barbieri , Gino Isidori , Joel Jones-Perez , Paolo Lodone , David M. Straub

This decade should provide the first definitive signals of New Physics (NP) beyond the Standard Model (SM) and the goal of these lectures is a review of flavour physics in various extensions of the SM that have been popular in the last ten…

High Energy Physics - Phenomenology · Physics 2015-03-17 Andrzej J. Buras

The flavor structure of a wide class of models, denoted as next to minimal flavor violation (NMFV), is considered. In the NMFV framework, new physics (NP), which is required for stabilization of the electroweak symmetry breaking (EWSB)…

High Energy Physics - Phenomenology · Physics 2007-05-23 Kaustubh Agashe , Michele Papucci , Gilad Perez , Dan Pirjol

We consider the approximate U(2)^3 flavour symmetry exhibited by the quark sector of the Standard Model and all its possible breaking terms appearing in the quark Yukawa couplings. Taking an Effective Field Theory point of view, we…

High Energy Physics - Phenomenology · Physics 2015-06-05 Riccardo Barbieri , Dario Buttazzo , Filippo Sala , David M. Straub

With the help of the light-quark triangle, which is essentially congruent to the rescaled unitarity triangle for a variety of textures of the quark mass matrices, we calculate the CP-violating quantity \sin 2\beta and the ratio of |V_{ub}|…

High Energy Physics - Phenomenology · Physics 2010-11-23 Harald Fritzsch , Zhi-zhong Xing

A sample of 400 $B^0_d/\bar{B}{^0_d} \to J/\psi K^0_s$ decays collected in $\bar{p}p$ collisions by the CDF detector is used to directly measure the CP-violation parameter $\sin(2\beta)$. We find $\sin(2\beta) = 0.79…

High Energy Physics - Experiment · Physics 2007-05-23 G. Bauer

I review the status of CP violation in the Standard Model from the combination of flavour constraints within the CKMfitter frequentist approach and I describe studies of New Physics restricted to the Delta F=2 sector to explain recent…

High Energy Physics - Phenomenology · Physics 2015-06-11 Sébastien Descotes-Genon

Results by the BaBar and Belle experiments of the measurements $\sin 2\alpha$, $\sin 2\beta$ and $\sin (2\beta + \gamma)$ along with the CKM matrix elements $V_{cb}$ and $V_{ub}$ are presented. The BaBar and Belle experiments $b \to…

High Energy Physics - Experiment · Physics 2010-11-23 E. O. Olaiya

We provide a short account of the effects one expects on meson-antimeson oscillations in the context of the Minimal Supersymmetric Standard Model (MSSM). This issue is largely dependent on the assumptions made on the MSSM parameter space.…

High Energy Physics - Phenomenology · Physics 2007-10-11 Diego Guadagnoli

We present an analysis of low energy CP violating observables in the Minimal Supersymmetric Standard Model (MSSM). We focus on the predictions of CP violation in b -> s transitions in the framework of a flavor blind MSSM, where the CKM…

High Energy Physics - Phenomenology · Physics 2015-05-14 Wolfgang Altmannshofer

The recently reported measurements of the CP asymmetry a(psi K) by the BABAR and BELLE collaborations are in good agreement with the standard model prediction. With the anticipated precision in a(psi K) at the B factories and hadron…

High Energy Physics - Phenomenology · Physics 2007-05-23 E. Lunghi

The D0 collaboration has recently announced evidence for a dimuon CP asymmetry in B_{d,s} decays of order one percent. If confirmed, this asymmetry requires new physics. We argue that for minimally flavor violating (MFV) new physics, and at…

High Energy Physics - Phenomenology · Physics 2014-11-21 Kfir Blum , Yonit Hochberg , Yosef Nir

The stringent correlations between flavour observables in models with CMFV are consistent with the present data except for the correlation Delta M_{s,d}-epsilon_K. Motivated by the recent work of Barbieri et al, we compare the CMFV…

High Energy Physics - Phenomenology · Physics 2015-06-05 Andrzej J. Buras , Jennifer Girrbach

Here we propose an $A_4$ flavour symmetry model which implies a lower bound on the neutrinoless double beta decay rate, corresponding to an effective mass parameter $M_{ee} \gsim 0.03$ eV, and a direct correlation between the expected…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Hirsch , Anjan S. Joshipura , S. Kaneko , J. W. F. Valle

We confront the new physics models with extra iso-singlet down quarks in the new CP violation experimental era with $\sin{(2\beta)}$ and $\epsilon'/\epsilon$ measurements, $K^+ \to \pi^+ \nu \bar{\nu}$ events, and $x_s$ limits. The…

High Energy Physics - Phenomenology · Physics 2010-11-23 Donovan Hawkins , Dennis Silverman

This paper reports an updated measurement of the Standard Model CP violation parameter $\sin2\beta$ using the CDF Detector at Fermilab. The entire Run I data sample of 110 pb$^{-1}$ of proton antiproton collisions at $\sqrt{s}=1.8 TeV$ is…

High Energy Physics - Experiment · Physics 2012-08-27 CDF Collaboration