Testing the CKM Picture of Flavour and CP Violation in Rare K and B Decays and Particle-Antiparticle Mixing

Buras, Andrzej J.

doi:10.1143/ptp.122.145

Cited by 10 publications

(13 citation statements)

References 68 publications

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“…The simplest class of extensions of the SM are models with Constrained Minimal Flavour Violation (CMFV) [17][18][19][20]. They are formulated as follows:…”

Section: Master Formula For Weak Decaysmentioning

confidence: 99%

Flavour Theory: 2009

Buras¹

2010

Proceedings of European Physical Society Europhysics Conference on High Energy Physics — PoS(EPS-HEP 2009)

158

246

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“…The simplest class of extensions of the SM are models with Constrained Minimal Flavour Violation (CMFV) [17][18][19][20]. They are formulated as follows:…”

Section: Master Formula For Weak Decaysmentioning

confidence: 99%

Flavour Theory: 2009

Buras¹

2010

Proceedings of European Physical Society Europhysics Conference on High Energy Physics — PoS(EPS-HEP 2009)

158

246

View full text Add to dashboard Cite

“…As we have seen in §III B, new physics contributions are extremely small in s ↔ d, b ↔ d, s ↔ b, and c ↔ u transitions. For summaries of tests of the CKM paradigm in flavor physics, see [97] for an experimental perspective and a look ahead, and [74] for a theoretical perspective.…”

Section: )mentioning

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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“…The study of B mesons at the B factories, BABAR [1] and Belle [2], and the Tevatron experiments [3,4] has significantly advanced the precision with which various standard model (SM) parameters are known, and consequently has placed stringent constraints on models of new physics affecting quark flavor [5]. The prevailing view is that such new physics must reside at or above the electroweak scale, manifesting at low energies in modifications to the Wilson coefficients of effective flavor-changing operators that arise once the heavy degrees of freedom are integrated out.…”

Section: Introductionmentioning

confidence: 99%

Multilepton signatures of a hidden sector in rareBdecays

2011

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We explore the sensitivity of flavor-changing b ! s transitions to a (sub-) GeV hidden sector with generic couplings to the standard model through the Higgs, vector, and axion portals. The underlying twobody decays of B mesons, B ! X s S, and B 0 ! SS, where S denotes a generic new GeV-scale particle, may significantly enhance the yield of monochromatic lepton pairs in the final state via prompt S ! l " l decays. Existing measurements of the charged lepton spectrum in neutral-current semileptonic B decays provide bounds on the parameters of the light sector that are significantly more stringent than the requirements of naturalness. New search modes, such as B ! X s þ nðl " lÞ and B 0 ! nðl " lÞ with n ! 2, can provide additional sensitivity to scenarios in which both the Higgs and vector portals are active, and are accessible to (super-) B factories and hadron colliders.

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Testing the CKM Picture of Flavour and CP Violation in Rare K and B Decays and Particle-Antiparticle Mixing

Cited by 10 publications

References 68 publications

Flavour Theory: 2009

Flavour Theory: 2009

Unanswered Questions in the Electroweak Theory

Multilepton signatures of a hidden sector in rareBdecays

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