Physics Case for the 250 GeV Stage of the International Linear Collider

Keisuke Fujii , Christophe Grojean , Michael E. Peskin , Tim Barklow , Yuanning Gao , Shinya Kanemura , Hyungdo Kim , Jenny List , Mihoko Nojiri , Maxim Perelstein , Roman Poeschl (1) , Juergen Reuter , Frank Simon , Tomohiko Tanabe , James D. Wells , Jaehoon Yu , Mikael Berggren , Moritz Habermehl , Sunghoon Jung , Robert Karl , Tomohisa Ogawa , Junping Tian , James Brau , Hitoshi Murayama

1 LAL - Laboratoire de l'Accélérateur Linéaire

The International Linear Collider is now proposed with a staged machine design, with the first stage at 250 GeV with a luminosity goal of 2 ab-1. In this paper, we review the physics expectations for this machine. These include precision measurements of Higgs boson couplings, searches for exotic Higgs decays, other searches for particles that decay with zero or small visible energy, and measurements of e+e- annihilation to W+W- and 2-fermion states with improved sensitivity. A summary table gives projections for the achievable levels of precision based on the latest full simulation studies.

Mots clés: electron positron: annihilation; electron positron: colliding beams; polarized beam; polarization: longitudinal; polarization: transverse; Higgs particle: electroproduction; Higgs particle: coupling; new physics: search for; Higgs particle: rare decay; W: pair production; ILC Coll; sensitivity; numerical calculations: Monte Carlo; proposed experiment

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique des Hautes Energies - Phénoménologie [hep-ph]

Keisuke Fujii, Christophe Grojean, Michael E. Peskin, Tim Barklow, Yuanning Gao, et al.. Physics Case for the 250 GeV Stage of the International Linear Collider. 2018. ⟨hal-01680382⟩