다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

https://biblio.ugent.be/publication/685594/file/1130605.pdf

Review of Particle Physics

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

비만아 부모의 돌봄 경험: q 방법론

Precise measurements of the tau lepton properties provide stringent tests of the Standard Model structure and accurate determinations of its parameters. We overview the present status of a few selected topics: lepton universality, QCD tests and the determination of alpha_s, m_s and V_us from hadronic tau decays, and lepton flavor violation phenomena.

Theoretical overview on tau physics

Chiral Perturbation Theory provides a useful framework to analyze rare kaon decays, where long-distance effects are expected to play an important role. Some theoretical predictions obtained within this framework for radiative kaon decays are reviewed, together with the present experimental status. Special consideration is given to the KL → π0e+e− decay, which appears as an ideal candidate to look for new signals of CP-violation within the standard model.

/pdf/rare-kaon-decays-in-chiral-perturbation-theory-4bnzik07eq.pdf

Rare kaon decays in chiral perturbation theory

Nondecoupling effects related to a large m{sub t} affecting nonoblique radiative corrections in vertices (Z{bar b}b) and boxes (B-{bar B} mixing and {epsilon}{sub K}) are sensitive to the mechanism of spontaneous symmetry breaking. In the framework of the effective chiral electroweak standard model there is only one O(p{sup 4}) operator which modifies the longitudinal part of the W{sup +} boson without touching the oblique corrections. This operator affects the Z{bar b}b vertex, the B-{bar B} mixing, and the CP-violating parameter {epsilon}{sub K}, generating interesting correlations among the hard m{sup 4}{sub t}lnm{sup 2}{sub t} corrections to these observables. {copyright} {ital 1997} {ital The American Physical Society}

/pdf/hard-m-t-corrections-as-a-probe-of-the-symmetry-breaking-57y1igebel.pdf

Hard m(t) corrections as a probe of the symmetry breaking sector

In multi-Higgs-doublet models, the alignment in flavour space of all Yukawa matrices coupling to a given right-handed fermion guarantees the absence of tree-level flavour-changing neutral couplings, while introducing new sources of CP violation. With N Higgs doublets (and no right-handed neutrinos) the Yukawa Lagrangian is characterized by the fermion masses, the CKM quark mixing matrix and 3(N-1) complex couplings. Quantum corrections break the alignment, generating a minimal-flavour-violation structure with flavour-blind phases. The aligned multi-Higgs-doublet models lead to a rich and viable phenomenology with an interesting hierarchy of flavour-changing neutral current effects, suppressing them in light-quark systems while allowing potentially relevant signals in heavy-quark transitions.

Flavour constraints on multi-Higgs-doublet models: Yukawa alignment

We consider a simple extension of the electroweak theory, incorporating one SU(2)L doublet of colour-octet scalars with Yukawa couplings satisfying the principle of minimal flavour violation. Using the HEPfit package, we perform a global fit to the available data, including all relevant theoretical constraints, and extract the current bounds on the model parameters. Coloured scalars with masses below 1.05 TeV are already excluded, provided they are not fermiophobic. The mass splittings among the different (charged and CP-even and CP-odd neutral) scalars are restricted to be smaller than 20 GeV. Moreover, for scalar masses smaller than 1.5 TeV, the Yukawa coupling of the coloured scalar multiplet to the top quark cannot exceed the one of the SM Higgs doublet by more than 80%. These conclusions are quite generic and apply in more general frameworks (without fine tunings). The theoretical requirements of perturbative unitarity and vacuum stability enforce relevant constraints on the quartic scalar potential parameters that are not yet experimentally tested.

/pdf/constraints-on-coloured-scalars-from-global-fits-3618crh7dp.pdf

Antonio Pich

Papers

Theoretical overview on tau physics

Rare kaon decays in chiral perturbation theory

Hard m(t) corrections as a probe of the symmetry breaking sector

Flavour constraints on multi-Higgs-doublet models: Yukawa alignment

Constraints on coloured scalars from global fits