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We report a high-precision calculation of the Standard Model electroweak radiative corrections in the $K\to \pi e^+\nu(\gamma)$ decay as a part of the combined theory effort to understand the existing anomaly in the determinations of…

High Energy Physics - Phenomenology · Physics 2021-08-11 Chien-Yeah Seng , Daniel Galviz , Mikhail Gorchtein , Ulf-G. Meißner

We present a complete calculation of the K_{l3} decays K^+ --> pi^0 l^+ nu_l and K^0 --> pi^- l^+ nu_l to O(p^4, (m_d-m_u) p^2, e^2 p^2) in chiral perturbation theory with virtual photons and leptons. We introduce the concept of generalized…

High Energy Physics - Phenomenology · Physics 2008-11-26 V. Cirigliano , M. Knecht , H. Neufeld , H. Rupertsberger , P. Talavera

The measurements of $V_{us}$ in leptonic $(K_{\mu 2})$ and semileptonic $(K_{l3})$ kaon decays exhibit a $3\sigma$ disagreement, which could originate either from physics beyond the Standard Model or some large unidentified Standard Model…

High Energy Physics - Phenomenology · Physics 2021-11-30 Chien-Yeah Seng , Daniel Galviz , Mikhail Gorchtein , Ulf-G. Meißner

We review some recent progress in the theory of electroweak radiative corrections in semileptonic decay processes. The resurrection of the so-called Sirlin's representation based on current algebra relations permits a clear separation…

High Energy Physics - Phenomenology · Physics 2021-10-07 Chien-Yeah Seng

We study the radiative corrections to all Kl3 decay modes to leading non-trivial order in the chiral effective field theory, working with a fully inclusive prescription on real photon emission. We present new results for Kmu3 modes and…

High Energy Physics - Phenomenology · Physics 2009-01-06 Vincenzo Cirigliano , Maurizio Giannotti , Helmut Neufeld

We present a simple method for considering radiative corrections. Precision data are well described by an adequate Born approximation and only the first evidence for deviations from the tree level formulas and the presence of the loop…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Vysotsky , ITEP , Moscow , Russia

Motivated by recent experimental results and ongoing measurements, we review the chiral perturbation theory prediction for radiative Ke3 decays (neutral kaons). Special emphasis is given on the stability of the inner…

High Energy Physics - Phenomenology · Physics 2011-07-19 J. Gasser , B. Kubis , N. Paver , M. Verbeni

The aim of this article is to review the very important role played by radiative corrections in precision electroweak physics, in the framework of both the Fermi Theory of Weak Interactions and the Standard Theory of Particle Physics.…

High Energy Physics - Phenomenology · Physics 2015-06-11 Alberto Sirlin , Andrea Ferroglia

After a short status report on chiral perturbation theory, I review recent progress in determining some of the low-energy couplings by matching the effective theory to QCD. Consequences for K_{l3} decays and for the extraction of the CKM…

High Energy Physics - Phenomenology · Physics 2009-11-11 G. Ecker

The estimation of rare K decay matrix-elements from Kl3 experimental data is extended beyond LO in Chiral Perturbation Theory. Isospin-breaking effects at NLO (and partially NNLO) in the ChPT expansion, as well as QED radiative corrections…

High Energy Physics - Phenomenology · Physics 2008-11-26 Federico Mescia , Christopher Smith

We re-investigate the radiative charged kaon decay K+- --> pi0 e+- nu_e gamma in chiral perturbation theory, merging the chiral expansion with Low's theorem. We thoroughly analyze the precision of the predicted branching ratio relative to…

High Energy Physics - Phenomenology · Physics 2008-11-26 Bastian Kubis , Eike H. Müller , Jürg Gasser , Martin Schmid

We discuss radiative corrections to K_{e3} and pi_{e3} decays within chiral perturbation theory with virtual photons and leptons. We then present the extraction of the CKM elements V_{us} and V_{ud} using the presently available…

High Energy Physics - Phenomenology · Physics 2007-05-23 V. Cirigliano

Aspects of theoretical electroweak physics are summarized, including the status of electroweak radiative corrections, the hadronic contribution to the running of alpha, global fits to precision data and their implication for testing the…

High Energy Physics - Phenomenology · Physics 2007-05-23 Paul Langacker

A new framework to study electroweak physics at one-loop level in general ${\rm SU(2)_L \times U(1)_Y}$ theories is introduced. It separates the 1-loop corrections into two pieces: process specific ones from vertex and box contributions and…

High Energy Physics - Phenomenology · Physics 2008-02-03 K. Hagiwara , S. Matsumoto , C. S. Kim

We discuss the development of the theory of electroweak radiative corrections and its role in testing the Standard Model, predicting the top quark mass, constraining the Higgs boson mass, and searching for deviations that may signal the…

High Energy Physics - Phenomenology · Physics 2008-11-26 Alberto Sirlin

Rare K decays are an important testing ground of the electroweak flavour theory. They can provide new signals of CP-violation phenomena and, perhaps, a window into physics beyond the Standard Model. The interplay of long-distance QCD…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Pich

An adequate description of the neutral-current Drell-Yan process at the Tevatron and the LHC, in particular, requires the inclusion of electroweak radiative corrections. We extend earlier work in this direction in various ways. First, we…

High Energy Physics - Phenomenology · Physics 2014-11-20 Stefan Dittmaier , Max Huber

A concise review about the status of the calculation of radiative corrections to the Drell-Yan processes is presented. The effect of matching together exact electroweak O(alpha) corrections with higher-order QED effects due to multiple…

High Energy Physics - Phenomenology · Physics 2007-05-23 C. M. Carloni Calame , G. Montagna , O. Nicrosini , A. Vicini

I give a short overview of what has been done in radiative and semileptonic Kaon decays in Chiral Perturbation Theory. This includes for semileptonic decays the work which has been done to order $p^6$ including preliminary results of…

High Energy Physics - Phenomenology · Physics 2008-11-26 Johan Bijnens

We introduce a useful framework for high-precision studies of the neutron beta decay by merging the current algebra description and the fixed-order effective field theory calculation of the electroweak radiative corrections to the neutron…

High Energy Physics - Phenomenology · Physics 2024-07-23 Chien-Yeah Seng
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