E<scp>STABLISHMENT OF</scp> <i>CP</i> V<scp>IOLATION IN</scp> <i>B</i> D<scp>ECAYS</scp>

Browder, T. E.; Faccini, R.

doi:10.1146/annurev.nucl.53.041002.110437

Cited by 9 publications

(5 citation statements)

References 40 publications

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“…the decay of neutral K-and Bmesons (Alavi-Harati et al, 2000;Browder and Facini, 2003;Christenson et al, 1964;Fanti et al, 1999), and the excess of baryonic matter over antimatter in the Universe (Riotto and Trodden, 1999). However, the CPviolation that is observed in K-and B-meson decays, and which can be incorporated in the standard model via the quark mixing mechanism, is too weak to explain the excess of baryons over antibaryons.…”

Section: Time Reversal Violationmentioning

confidence: 99%

Tests of the standard electroweak model in nuclear beta decay

2006

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We review the current status of precision measurements in allowed nuclear beta decay, including neutron decay, with emphasis on their potential to look for new physics beyond the standard electroweak model. The experimental results are interpreted in the framework of phenomenological model-independent descriptions of nuclear beta decay as well as in some specific extensions of the standard model. The values of the standard couplings and the constraints on the exotic couplings of the general beta decay Hamiltonian are updated. For the ratio between the axial and the vector couplings we obtain C A /C V = −1.26992(69) under the standard model assumptions. Particular attention is devoted to the discussion of the sensitivity and complementarity of different precision experiments in direct beta decay. The prospects and the impact of recent developments of precision tools and of high intensity low energy beams are also addressed.

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Section: Time Reversal Violationmentioning

confidence: 99%

Tests of the standard electroweak model in nuclear beta decay

2006

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“…Immense experimental effort has produced a rich library of information about decays (both common and rare) neutral-particle mixings, and CP violation (in K and B decays) [91,92,93]. One application of that body of knowledge has been to probe in depth the unitarity of the CKM matrix VV † = I, where I is the 3 × 3 identity, by examining The six vanishing conditions may be represented as triangles in the complex plane, each with an area proportional to…”

Section: Tests Of the Ckm Paradigmmentioning

confidence: 99%

Unanswered Questions in the Electroweak Theory

Quigg

2009

Annu. Rev. Nucl. Part. Sci.

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This article is devoted to the status of the electroweak theory on the eve of experimentation at CERN's Large Hadron Collider. A compact summary of the logic and structure of the electroweak theory precedes an examination of what experimental tests have established so far. The outstanding unconfirmed prediction of the electroweak theory is the existence of the Higgs boson, a weakly interacting spin-zero particle that is the agent of electroweak symmetry breaking, the giver of mass to the weak gauge bosons, the quarks, and the leptons. General arguments imply that the Higgs boson or other new physics is required on the TeV energy scale. Indirect constraints from global analyses of electroweak measurements suggest that the mass of the standard-model Higgs boson is less than 200 GeV. Once its mass is assumed, the properties of the Higgs boson follow from the electroweak theory, and these inform the search for the Higgs boson. Alternative mechanisms for electroweak symmetry breaking are reviewed, and the importance of electroweak symmetry breaking is illuminated by considering a world without a specific mechanism to hide the electroweak symmetry.For all its triumphs, the electroweak theory has many shortcomings. It does not make specific predictions for the masses of the quarks and leptons or for the mixing among different flavors. It leaves unexplained how the Higgs-boson mass could remain below 1 TeV in the face of quantum corrections that tend to lift it toward the Planck scale or a unification scale. The Higgs field that must pervade all of space to hide the electroweak symmetry contributes a vacuum energy density far in excess of what is observed. And the electroweak theory responds inadequately to challenges raised by astronomical observations, including the dark-matter problem and the baryon asymmetry of the Universe. These shortcomings argue for physics beyond the standard model; some possibilities are recalled.The Large Hadron Collider moves experiments squarely into the TeV scale, where answers to important outstanding questions will be found. The questions are developed in the course of this review, and a short summary is attempted of how knowledge might accumulate.

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“…This figure has become very popular and is featured in Fig. 9.2 and in many articles Brower and Faccini, 2003). The value of β in Eq.…”

Section: Decay Rates and Cp Violationmentioning

confidence: 99%

Electroweak Theory

Paschos

2023

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The electroweak theory unifies two basic forces of nature: the weak force and electromagnetism. This is a concise introduction to the structure of the electroweak theory and its applications. It describes the structure and properties of field theories with global and local symmetries, leading to the standard model. It describes the particles and processes predicted by the theory, and compares them with experimental results. It also covers neutral currents, the properties of W and Z bosons, the properties of quarks and mesons containing heavy quarks, neutrino oscillations, CP-asymmetries in K, D, and B meson decays, and the search for Higgs particles. Each chapter contains problems to supplement the text, stemming from the author's long teaching experience. This will be of great interest to graduate students and researchers in elementary particle physics. Originally published in 2007, this title has been reissued as an Open Access publication on Cambridge Core.

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ESTABLISHMENT OF CP VIOLATION IN B DECAYS

Cited by 9 publications

References 40 publications

Tests of the standard electroweak model in nuclear beta decay

Tests of the standard electroweak model in nuclear beta decay

Unanswered Questions in the Electroweak Theory

Electroweak Theory

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