Yoshimasa Kurihara

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We describe a scheme for producing polarised positrons at the ILC from polarised X-rays created by Compton scattering of a few-GeV electron beam off a CO 2 or YAG laser. This scheme is very energy effective using high finesse laser cavities in conjunction with an electron storage ring. At the ILC there exists a well motivated physics case to have not only(More)
Recently the collider physics community has seen significant advances in the formalisms and implementations of event generators. This review is a primer of the methods commonly used for the simulation of high energy physics events at particle colliders. We provide brief descriptions, references, and links to the specific computer codes which implement the(More)
We present a study of single-W production (e + e − → e − ¯ ν e W +) as a new probe of the anomalous couplings at the LEP energy region. We introduce simple cuts to separate the single-W process from W-pair production and have performed cross-section calculations using 4-fermion generator " grc4f ". The cross-section of the single-W process is found to be(More)
We investigate a single scalar neutrino production at the upgraded HERA with high luminosity in the framework of an R-parity violating super-symmetric model. We find that the scalar neutrino with mass around 100GeV could be observed through investigating the multilepton production process e − p → µ − ν τ X → µ − (e − µ +)X. The signal would be characterized(More)
A set of one-loop vertex and box tensor-integrals with massless internal particles has been obtained directly without any reduction method to scalar-integrals. The results with one or two massive external lines for the vertex integral and zero or one massive external lines for the box integral are shown in this report. Dimensional regularization is employed(More)