Looking for anomalous gamma-gamma-H and Z-gamma-H couplings at future linear collider

We consider the possibility of studying anomalous contributions to the gamma-gamma-H and Z-gamma-H vertices through the process e-gamma--> e-H at future e-gamma linear colliders, with Sqrt(S)=500-1500 GeV. We make a model independent analysis based on SU(2)xU(1) invariant effective operators of dim=6 added to the standard model lagrangian. We consider a light Higgs boson (mostly decaying in bar(b)-b pairs), and include all the relevant backgrounds. Initial e-beam polarization effects are also analyzed. We find that the process e-gamma--> e-H provides an excellent opportunity to strongly constrain both the CP-even and the CP-odd anomalous contributions to the gamma-gamma-H and Z-gamma-H vertices.Comment: LaTeX, 33 pages, 16 eps figures, extended section

How to choose the endorser: An experimental analysis on the effects of fit and notoriety

The present study is focused on the endorser topic following two different paths: firstly, proposing an extension of the theoretical match-up model, enlarge it through two other potential types of consistency: the typicality fit and the imagery fit. Secondly, the present study aims verifies the applicability of the same framework to the emerging situation with a brand linked to a not well-known endorser (internal as the founder or external as a web influencer). An experimental 3*2 (fit typology*high/low notoriety) between subject analysis was conducted in the food service domain. It showed some interesting considerations.From a theoretical point of view, the first relevant finding is that endorsement might be assimilated to a co-branding strategy, confirming the match-up model as an effective theoretical framework in this domain as well, with significant differences among the three fit typologies investigated. The typicality fit reveals to be the less effective in increasing attitude and other behavioural effects on consumers in spite of the large adoption of this kind of fit by companies. Instead, the imagery fit, seems to be the most impactful in terms of positive word of mouth activation and viral communication activities, at the same level at the categorical one. Moreover, the categorical fit induces the wider range of positive effect on the dependent variables (attitudes, willingness to pay and willingness to buy). Another interesting contribution is that the presence of an appropriate fit (in particular the categorical one) is able to compensate the absence of endorser notoriety and, on the average, the usage of a very popular endorser from the same domain of the brand is not necessary more effective in comparison with a not well-known endorser form the same domain. This result is the peak of the present research from a managerial point of view, as it leads to consider the opportunity to support the emerging practices by which companies turn to not well-known people (disclosing the founder, or presenting some workers, or adopting a common consumer as an influencer). The endorser not well-known, but presented with an adequate story-telling might be the best choice: less onerous and more effective than a big unrelated celebrity

Travail des femmes, caractéristiques familiales et sociales : le cas du Maroc

L’objectif de cet article est d’analyser les déterminants de la participation des femmes au marché du travail au Maroc selon une approche comparative à la fois « temporelle », portant sur la dernière décennie, et « spatiale », en ce qu’elle distingue les milieux urbains des milieux ruraux. Les résultats obtenus mettent en évidence que le processus général de modernisation du pays ne semble pas avoir mené, comme dans d’autres pays, à une plus grande insertion des femmes dans le marché du travail. Néanmoins, la stabilité de la participation féminine au marché du travail, telle qu’observée, pourrait être considérée non pas comme une « occasion perdue » dans le processus d’amélioration du statut des femmes, mais plutôt comme une étape obligée de leur affranchissement d’activités dégradantes ancrées dans un système de production arriéré.The objective of this study is to investigate the main determinants of female labour force participation in Morocco. A comparative approach is used, over time to analyse the evolution during the past decade, and in space to take into account the consequences of urbanisation. The findings reveal that the general process of modernisation under way in Morocco has not yet led to greater participation of women in the labour market. Nevertheless, the results also suggest that the stability of female labour force participation observed in this Maghrebian country could be considered an indispensable step in their emancipation from degrading activities in an outdated system of production, rather than as a « lost opportunity » in the process of improvement of women’s status

Measuring Z-gamma-Higgs vertex effects at e-gamma linear colliders

The one-loop process e,gamma->e,h for intermediate Higgs masses is considered. Exact cross sections for unpolarized and longitudinally polarized beams are computed and found to be more than two orders of magnitude larger than the rates for the crossed process e,e->gamma,h, in the energy range \sqrt{s}=(0.5-2) TeV. We show that, apart from being competitive with the gamma,gamma->H process for testing the one-loop gamma-gamma-H vertex, by requiring a final electron tagged at large angle the channel e,gamma->e,h provides an excellent way of testing the Z-gamma-H vertex.Comment: 11 pages, 8 figures. A gzipped complete postscript file is available at ftp://hpteo.roma1.infn.it/pub/preprints/mele/Rome1-1178.ps.gz To appear in the Report DESY 97-123

Bounds on anomalous gamma-gamma-H and Z-gamma-H couplings at future e-gamma linear colliders

We study the bounds on the anomalous contributions to the gamma-gamma-H and Z-gamma-H vertices that can be obtained via the process e-gamma-->e H. We consider the representative case of an intermediate Higgs mass production of MH=120 GeV and for a center of mass energy of Sqrt{S}=500 GeV and Sqrt{S}=1500 GeV. We use a model independent analysis based on SU(2)xU(1) invariant operators of dimension 6 added to the Standard Model lagrangian. We find that this process provides an excelent way to put strong constraints both in the sector of CP-even and CP-odd anomalous couplings contribution to the gamma-gamma-H and Z-gamma-H vertices.Comment: LaTeX, 6 pages, To appear in the proceedings of the International Workshop on Linear Colliders, Sitges, Barcellona, Spain, April 28 - May 5, (1999

Anomalous gamma-gamma-H and Z-gamma-H couplings in the process e,gamma->e,H

The bounds on the anomalous contributions to the ggh and zgh vertices that can be obtained via the process eg->eh are discussed through a model independent analysis based on SU(2) X U(1) invariant operators of dim=6. A light Higgs boson with m_H ~ 120 GeV and center-of-mass energies of \sqrt{S}=500 GeV and \sqrt{S}=1500 GeV are assumed. The process eg->eh is shown to provide an excellent way to strongly constraint both the CP-even and CP-odd anomalous contributions in the ggH and ZgH couplings.Comment: 8 pages. To appear in the DESY report on "Physics Studies for a Future Linear Collider", DESY 123

Testing the ZγHZ\gamma H vertex at future linear colliders for intermediate Higgs masses

Higgs production in $e\gamma$ collisions, through the one-loop reaction $e\gamma\to eH$ at large $p_T$, can provide a precise determination of the $Z\gamma H$ vertex.Comment: 2 pages (standard LaTeX code); Contribution to the Proceedings of the Int. Europhysics Conference on High Energy Physics (Jerusalem, 19-26 August 1997

ZγHZ\gamma H Vertex Effects at Future Colliders

We show that the Higgs production in $e\gamma$ collisions, through the one-loop reaction $e\gamma\to eH$ at large transverse momentum, can provide a precise determination of the $Z\gamma H$ vertex. We concentrate on the analysis of signal rates vs background looking for strategies to improve the ratio $S/B$. Possible bounds on anomalous contributions to the $Z\gamma H$ vertex are derived.Comment: 5 pages (standard LaTeX code); Talk given at "Beyond the Standard Model V" Conference, April 29 - May 4 1997, Balholm (Norway); to be published in the Proceeding