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Sökning: WFRF:(Fraas H)

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1.
  • Moortgat-Pick, G., et al. (författare)
  • Polarized positrons and electrons at the linear collider
  • 2008
  • Ingår i: Physics reports. - : Elsevier BV. - 0370-1573 .- 1873-6270. ; 460:4-5, s. 131-243
  • Forskningsöversikt (refereegranskat)abstract
    • The proposed International Linear Collider (ILC) is well-suited for discovering physics beyond the Standard Model and for precisely unraveling the structure of the underlying physics. The physics return can be maximized by the use of polarized beams. This report shows the paramount role of polarized beams and summarizes the benefits obtained from polarizing the positron beam, as well as the electron beam. The physics case for this option is illustrated explicitly by analyzing reference reactions in different physics scenarios. The results show that positron polarization, combined with the clean experimental environment provided by the linear collider, allows to improve strongly the potential of searches for new particles and the identification of their dynamics, which opens the road to resolve shortcomings of the Standard Model. The report also presents an overview of possible designs for polarizing both beams at the ILC, as well as for measuring their polarization.
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2.
  • Badelek, B, et al. (författare)
  • The photon collider at TESLA
  • 2004
  • Ingår i: International Journal of Modern Physics A. - 0217-751X. ; 19:30, s. 5097-5186
  • Forskningsöversikt (refereegranskat)abstract
    • High energy photon colliders (gammagamma,gammae) are based on e(-)e(-) linear colliders where high energy photons are produced using Compton scattering of laser light on high energy electrons just before the interaction point. This paper is a part of the Technical Design Report of the linear collider TESLA.(1) Physics program, possible parameters and some technical aspects of the photon collider at TESLA are discussed.
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3.
  • Bartl, A., et al. (författare)
  • CP-odd observables in neutralino production with transverse e+ and e- beam polarization
  • 2006
  • Ingår i: Journal of High Energy Physics. - : Springer Science and Business Media LLC. - 1029-8479. ; 01, s. 170-197
  • Tidskriftsartikel (refereegranskat)abstract
    • We consider neutralino production and decay e+e-→tilde chi0itilde chi0j, tilde chi0j→tilde chi01fbar f at a linear collider with transverse e+ and e- beam polarization. We propose CP asymmetries by means of the azimuthal distribution of the produced neutralinos and of that of the final leptons, while taking also into account the subsequent decays of the neutralinos. We include the complete spin correlations between production and decay. Our framework is the Minimal Supersymmetric Standard Model with complex parameters. In a numerical study we show that there are good prospects to observe these CP asymmetries at the International Linear Collider and estimate the accuracy expected for the determination of the phases in the neutralino sector.
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  • Resultat 1-4 av 4

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