One-loop QCD contributions to differential cross-sections for Higgs production at N3^3LO

We present one-loop contributions to the fully differential Higgs boson gluon-fusion cross-section for Higgs production via gluon fusion. Our results constitute a necessary ingredient of a complete N$^3$LO determination of the cross-section. We perform our computation using a subtraction method for the treatment of soft and collinear singularities. We identify the infrared divergent parts in terms of universal splitting and eikonal functions, and demonstrate how phase-space integrations yield poles (up to $1/\epsilon^6$ ) in the dimensional regulator $\epsilon=(4-d)/2$. We compute the coefficients of the $\epsilon$ expansion, including the finite part numerically. As a demonstration of our numerical implementation, we present the corrections at N$^3$LO due to one-loop amplitudes in the rapidity and transverse momentum of the Higgs boson.Comment: 25 pages, 2 figure

Higgs-differential cross section at NNLO in dimensional regularisation

We present an analytic computation of the Higgs production cross section in the gluon fusion channel, which is differential in the components of the Higgs momentum and inclusive in the associated partonic radiation through NNLO in perturbative QCD. Our computation includes the necessary higher order terms in the dimensional regulator beyond the finite part that are required for renormalisation and collinear factorisation at N$^3$LO. We outline in detail the computational methods which we employ. We present numerical predictions for realistic final state observables, specifically distributions for the decay products of the Higgs boson in the $\gamma\gamma$ decay channel.Comment: 27 pages, 6 awesome figure

Assessment of DNA damages in lymphocytes of agricultural workers exposed to pesticides by comet assay in a cross-sectional study

Purpose: To assess the predictive power of the comet assay in the context of occupational exposure to pesticides. Materials and methods: The recruited subjects completed a structured questionnaire and gave a blood sample. Exposure to pesticides was measured by means of an algorithm based on Dosemeci’s work (Agricultural Health Study). Approximately 50 images were analyzed for each sample via fluores- cence microscopy. The extent of DNA damage was estimated by tail moment (TM) and is the product of tail DNA (%) and tail Length. Results: Crude significant risks (odds ratios, ORs) for values higher than the 75th percentile of TM were observed among the exposed subjects (score>1). The frequency of some confounding factors (sex, age and smoking) was significantly higher among the exposed workers. A significant dose–effect relationship was observed between TM and exposure score. Significant high-risk estimates (ORs), adjusted by the studied confounding factors, among exposure to pesticides and TM, % tail DNA and tail length were confirmed using unconditional logistic regression models. Conclusions: The adjusted associations (ORs) between the comet parameters and exposure to pesti- cides were significant. The sensitivity of the comet test was low (41%), the specificity (89%) and the predictive positive value (0.77) were found acceptable

Systèmes de contrôle de constitutionnalité par voie incidente et protection des personnes en situation de vulnérabilité

Répondant à l’appel à projets « QPC 2020 » du Conseil constitutionnel, le travail de recherche collectif – dont les résultats sont publiés dans cet ouvrage – entend évaluer l’efficacité de la question prioritaire de constitutionnalité sous l’angle particulier de la protection des personnes en situation de vulnérabilité et selon une approche de droit comparé. La recherche a ainsi eu pour ambition de dresser un bilan de la jurisprudence QPC du Conseil constitutionnel pour ce qui concerne la protection des personnes vulnérables, en la confrontant avec les procédures similaires existant dans deux pays voisins : l’Italie et l’Espagne. La protection effective des personnes qui en ont le plus besoin a semblé en effet être un point de vue particulièrement pertinent pour évaluer, de manière générale, l’efficacité du système de la QPC et pour vérifier s’il constitue un véritable progrès dans la défense des droits fondamentaux. Pour rendre compte de la manière la plus fidèle possible des résultats de cette recherche, l’ouvrage présente, dans une première partie, le rapport de synthèse adressé au Conseil constitutionnel par les porteurs du projet, dans lequel est réalisée la comparaison proprement dite ; puis, dans une seconde partie, les études nationales concernant la jurisprudence constitutionnelle des trois pays étudiés, élaborées par les chercheurs participants au projet scientifique

Vector Fields in a Rindler Space

In questo lavoro ci si propone di studiare la quantizzazione del campo vettoriale, massivo e non massivo, in uno spazio-tempo di Rindler, considerando in particolare i gauge di Feynman e assiale. Le equazioni del moto vengono risolte esplicitamente in entrambi i casi; sotto opportune condizioni, è stato inoltre possibile trovare una base completa e ortonormale di soluzioni delle equazioni di campo in termini di modi normali di Fulling. Si è poi analizzata la quantizzazione dei campi vettoriali espressi in questa base

Mixed QCD-electroweak corrections to Higgs production via gluon fusion in the small mass approximation

Abstract We compute the mixed QCD-electroweak corrections to the cross section for the production of a Higgs boson via gluon fusion, in the limit of a small mass of the electroweak gauge bosons. This limit is regular and we calculate it by setting the W, Z masses to zero in the Feynman rules for their propagators. Our analytic results provide an independent check, in a non-trivial limit, of a recent exact computation for the three-loop mixed QCD and electroweak virtual corrections [1] and the corresponding contribution to the cross section in the soft-virtual approximation [2]. From our calculation in the small mass approximation, we can infer the second term in the expansion of the cross section around the threshold limit with its exact dependence on the masses of the W, Z bosons. Furthermore we find that in the small mass approximation the non-factorizable contributions from the real radiation, so far unknown for full gauge boson mass dependence, are modest in comparison to the known factorizable and virtual contributions to the full O α s 3 α 2 $$\mathcal{O}\left({\alpha}_s^3{\alpha}^2\right)$$ mixed QCD and electroweak cross-section. This furnishes a new phenomenological test of estimates [3] for the mixed QCD and electroweak corrections, which were based on the hypothesis of factorization of QCD and electroweak corrections