1 / 12

R. Belusevic & T. Higo

An X-band e+e-/ gg Higgs factory at KEK. R. Belusevic & T. Higo. R. Belusevic: KEK Preprint 2008-33, ArXiv:0810.3187v2. Main characteristics of the proposed facility:. Based on CLIC-type cavities and the existing RF technology (XL4 klystrons, ScandiNova modulators, SLED II system).

nova
Download Presentation

R. Belusevic & T. Higo

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. An X-band e+e-/gg Higgs factory at KEK R. Belusevic & T. Higo R. Belusevic: KEK Preprint 2008-33, ArXiv:0810.3187v2

  2. Main characteristics of the proposed facility: Based on CLIC-typecavities and the existing RF technology (XL4 klystrons, ScandiNova modulators, SLED II system) 1 A two-beam schemecould be implemented at a later stage as a test facility for CLIC 2 An optical FELwould be used to produce high-energy photon beams for a gg collider 3 In the first stage of operation (e+e- Z, WW and gg H) the proposed facility could be built within the KEK site 4

  3. Main characteristics of the proposed facility: If the initial operational mode is with photon beams, then there is no need for an e+ sourceand a positron DR 5 With a crossing angle of ~25 mrad for both e+e- and gg beams, only a single beam dump line would be required 6 For some processes, the required CM energyis considerably lower at the proposed facility than at an e+e- or pp collider 7 The rich set of final states in e+e- and gg collisions is essential for measuring all the properties of the Higgs boson 8

  4. Higgs production in e+e- and gg collisions The following Higgs properties can be measured in these processes: MH, spin, CP MH, spin, CP CP violation H-Z coupling GggBr(W*W) Gtot GggBr(bb), … Br(W*W), Br(bb), … Combining the two sets of measurements yields Ggg, which is a unique measure of physics beyond the Standard Model.

  5. Higgs self-coupling in e+e- and gg collisions The trilinear Higgs self-coupling can be measured in the process gg HH just above the kinematic threshold of 2MH (Eee ~ 340 GeV), and at Eee ~ 500 GeV in the process e+e- ZHH. Sensitivity to the trilinear Higgs self-coupling is expected to be similar in e+e- and gg collisions. Detailed MC simulations are currently carried out at Hiroshima University and KEK (K. Fujii et al.). R. Belusevic & G. Jikia: Phys. Rev. D 70, 073017-1 (2004)

  6. Schematic layout of the collider

  7. Optics assembly at the gg interaction region Elements of the assembly were designed and prototyped at LLNL

  8. Concluding remarks: The proposed facility would be a highly versatile Higgs factory. The total length of the two linacs would be only about 3.6 km at Eee ~ 250 GeV. If a two-beam scheme is implemented (even partially) at a later stage, the proposed X-band machine could serve as a genuine test facility for CLIC.

More Related