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Featured researches published by S. Rosier-Lees.


Journal of High Energy Physics | 2004

Lower limit on the neutralino mass in the general MSSM

G. Belanger; F. Boudjema; Aurélien Cottrant; A. Pukhov; S. Rosier-Lees

We discuss constraints on SUSY models with non-unified gaugino masses and R P conservation. We derive a lower bound on the neutralino mass combining the direct limits from LEP, the indirect limits from (g?2)? , b? s?, B s ??+?? and the relic density constraint from WMAP. The lightest neutralino m 1 0 ? 6 GeV is found in models with a light pseudoscalar with MA 18(29) GeV for tan? = 50(10). We show that even a very conservative bound from the muon anomalous magnetic moment can increase the lower bound on the neutralino mass in models with ? < 0 and/or large values of tan?. We then examine the potential of the Tevatron and the direct detection experiments to probe the SUSY models with the lightest neutralinos allowed in the context of light pseudoscalars with high tan?. We also examine the potential of an e + e ? collider of 500 GeV to produce SUSY particles in all models with neutralinos lighter than the W. In contrast to the mSUGRA models, observation of at least one sparticle is not always guaranteed.


Proceedings of The 34th International Cosmic Ray Conference — PoS(ICRC2015) | 2016

A new look at the cosmic ray positron fraction

Mathieu Boudaud; Pierre Salati; Yoann Genolini; L. Tao; V. Poireau; G. Belanger; A. Putze; C. Goy; S. Caroff; Vivian Poulin; M. Vecchi; S. Rosier-Lees; S. Aupetit

Mathieu Boudaud∗a, Sandy Aupetita, Sami Caroffb, Antje Putzea, Geneviève Bélangera, Yoann Genolinia, Corrine Goyb, Vincent Poireaub, Vivian Poulina, Sylvie Rosierb, Pierre Salatia, Li Taob, and Manuela Vecchic aLAPTh, Université Savoie Mont Blanc & CNRS, 9 Chemin de Bellevue, B.P.110 Annecy-le-Vieux, F-74941, France bLAPP, Université Savoie Mont Blanc & CNRS, 9 Chemin de Bellevue, B.P.110 Annecy-le-Vieux, F-74941, France cInstituto de Fisica de Saõ Carlos Av. Trabalhador saõ-carlense, 400 CEP: 13566-590 Saõ Carlos (SP), Brazil


Proceedings of The 34th International Cosmic Ray Conference — PoS(ICRC2015) | 2016

Uncertainties on propagation parameters: impact on the interpretation of the positron fraction

Mathieu Boudaud; Pierre Salati; Yoann Genolini; L. Tao; G. Belanger; V. Poireau; A. Putze; C. Goy; S. Caroff; Vivian Poulin; M. Vecchi; S. Rosier-Lees; S. Aupetit

Mathieu Boudauda, Sandy Aupetita, Sami Caroffb, Antje Putzea, Genevieve Belangera, Yoann Genolini∗a, Corine Goyb, Vincent Poireaub, Vivian Poulina, Sylvie Rosierb, Pierre Salatia, Li Taob, and Manuela Vecchic aLAPTh, Universite Savoie Mont Blanc & CNRS, 9 Chemin de Bellevue, B.P.110 Annecy-le-Vieux, F-74941, France bLAPP, Universite Savoie Mont Blanc & CNRS, 9 Chemin de Bellevue, B.P.110 Annecy-le-Vieux, F-74941, France cInstituto de Fisica de Sao Carlos Av. Trabalhador sao-carlense, 400 CEP: 13566-590 Sao Carlos (SP), Brazil

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G. Belanger

Centre national de la recherche scientifique

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Mathieu Boudaud

Centre national de la recherche scientifique

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S. Aupetit

Centre national de la recherche scientifique

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V. Poireau

Centre national de la recherche scientifique

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C. Goy

University of Savoy

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L. Tao

University of Savoy

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M. Vecchi

Aix-Marseille University

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