English
Related papers

Related papers: Estimating epsilon'/epsilon. A Review

200 papers

We study the minimal version of the supersymmetric standard model with spontaneous CP breaking. In this model, the KM matrix is real and contributions to $\varepsilon$ arise from box diagrams involving squarks. We analyze the region of the…

High Energy Physics - Phenomenology · Physics 2010-11-01 Alex Pomarol

Supersymmetric models with an approximate CP, $10^{-3} \lsim \phi_{CP} \ll 1$, are a viable framework for the description of nature. The full high energy theory has exact CP and horizontal symmetries that are spontaneously broken with a…

High Energy Physics - Phenomenology · Physics 2007-05-23 Galit Eyal

In this paper we propose to associate a temporal two-component wave-function to the decay process of meson particles. This simple quantum model provides a good estimation of the CP symmetry violation parameter. This result is based on our…

Quantum Physics · Physics 2009-03-25 M. Courbage , T. Durt , S. M. Saberi Fathi

The parameter $\epsilon_K$ describes CP violation in the neutral kaon system and is one of the most sensitive probes of new physics. The large uncertainties related to the charm-quark contribution to $\epsilon_K$ have so far prevented a…

High Energy Physics - Phenomenology · Physics 2020-10-28 Joachim Brod , Martin Gorbahn , Emmanuel Stamou

I review the implications of recent measurements of CP violation in D meson decays in the context of standard model extensions. Using effective theory methods, one can derive significant constraints on the possible non-standard…

High Energy Physics - Phenomenology · Physics 2013-02-18 Jernej F. Kamenik

The Positronium (Ps) system, a bound state of an electron and a positron, is suitable for testing the predictions of quantum electrodynamics (QED), since its properties can be perturbatively calculated to high accuracy and, unlike the…

Nuclear Experiment · Physics 2021-12-21 Elena Perez del Rio

We discuss a class of models in which CP is violated softly in a heavy sector adjoined to the standard model. Heavy-sector loops produce the observed CP violation in kaon physics, yielding a tiny and probably undetectable value for…

High Energy Physics - Phenomenology · Physics 2009-09-11 Howard Georgi , Sheldon L. Glashow

In the K and Bd systems, indirect CP violation is quantified by the parameters epsilon_K and sin 2beta respectively. Within the Standard Model, the uniqueness of the CP violating phase implies that the measurement of either between…

High Energy Physics - Phenomenology · Physics 2011-02-15 Diego Guadagnoli

Employing an effective formalism for decaying system we are able to investigate Heisenberg's uncertainty relation for observables measured at accelerator facilities. In particular we investigate the neutral K--meson system and show that,…

High Energy Physics - Phenomenology · Physics 2015-05-27 Beatrix C. Hiesmayr

We study the possibility of measuring nonstandard CP violation effects through Dalitz plot analysis in B --> D_s D^0\pi^0 decays. The accuracy in the extraction of CP violating phases is analyzed by performing a Monte Carlo simulation of…

High Energy Physics - Phenomenology · Physics 2007-05-23 Alejandro Szynkman

This series of five lectures describes aspects of CP violation, emphasizing its description within the standard electroweak model. After discussing the kaon system, the only place in which CP violation has been seen so far, we turn to the…

High Energy Physics - Phenomenology · Physics 2007-05-23 Jonathan L. Rosner

Within the standard model we carry out an analysis of $CP$-violating observables in neutral $B$-meson decays at the $\Upsilon (4S)$ resonance. Both time-dependent and time-integrated $CP$ asymmetries are calculated, without special…

High Energy Physics - Phenomenology · Physics 2010-11-01 H. Fritzsch , D. Wu , Z. Xing

We discuss the testing of the Standard Model of CP violation, and the search for CP-violating effects from beyond the Standard Model, in $B$ decays. We then focus on the quantum mechanics of the experiments on CP violation to be performed…

High Energy Physics - Phenomenology · Physics 2009-09-25 Boris Kayser

Phenomenological CP-violating parameters in decays of neutral B-mesons are discussed with special attention to the degree of their measurability. Important role of the sign of \Delta m_B is emphasized. We briefly describe how it could be…

High Energy Physics - Phenomenology · Physics 2016-11-03 Ya. Azimov

We study the possibility of measuring nonstandard CP violation effects through Dalitz plot analysis in B^\pm -> D_s^\pm D^0 pi^0 decays. The accuracy in the extraction of CP violating phases is analyzed by performing a Monte Carlo…

High Energy Physics - Phenomenology · Physics 2009-11-10 L. Epele , D. Gomez Dumm , R. Mendez-Galain , A. Szynkman

I discuss recent developments on non-leptonic and radiative kaon decays mainly related to direct CP-violation within the combined ChPT and 1/N_c expansion approaches. In particular, I review the status of K -> pi pi, epsilon_K', direct…

High Energy Physics - Phenomenology · Physics 2008-11-26 Joaquim Prades

A complete analysis of isospin breaking in $K\to 2\pi$ amplitudes, including both strong and electromagnetic corrections at next-to-leading order in chiral perturbation theory, has been achieved recently. We discuss the implication of these…

High Energy Physics - Phenomenology · Physics 2014-11-17 A. Pich

We discuss several aspects of rare decays and CP violation in the standard model including the impact of the recent top quark discovery. In particular we review the present status of next-to-leading QCD calculations in this field stressing…

High Energy Physics - Phenomenology · Physics 2010-11-01 Andrzej J. Buras

Using their full Tevatron Run II data sets, the CDF and D0 Experiments present measurements of CP-violating asymmetries in the charmless decay of bottom baryons Lambda-b => p pi-, Lambda-b => p K-, and also for Bs0 => K- pi+, B0 => K+ pi-,…

High Energy Physics - Experiment · Physics 2014-09-03 Peter H. Garbincius

We construct phenomenologically viable supersymmetric models where CP is an approximate symmetry. The full high energy theory has exact CP and horizontal symmetries that are spontaneously broken with a naturally induced hierarchy of scales,…

High Energy Physics - Phenomenology · Physics 2009-10-31 Galit Eyal , Yosef Nir