From okaday@post.kek.jp Mon May 7 21:34:10 2007 Date: Tue, 8 May 2007 10:33:56 +0900 (JST) From: okaday@post.kek.jp To: Heather Logan , Sven Heinemeyer Cc: "Higgs convenors (LCWS07) -- Tim Barklow" , Yasuhiro Okada , Aliaksei Raspiareza , yuanning.gao@cern.ch Subject: talk by Tsumura Dear all, Dr. Koji Tsumiura (KEK) would like to give a talk in our Higgs session. With barst regards, Yasuhiro Okada *************************************************** Title: New physics effect on the top-Yukawa coupling. Abstract: We discuss the new physics effect on the top-quark couplings. At the ILC, the top-Yukawa coupling can be tested in $e^-e^+ \to t \bar{t}H$ process for relatively light Higgs boson. On the other hand, the vector boson fusion process might be useful probe to study the top-Yukawa coupling for heavier Higgs boson. In this talk, we discuss a possibility to measure the top-Yukawa coupling and their new physics effect which are characterized by higher dimension operators for wide range of Higgs masses trough these processes. This work is collaborated with S. Kanemura (University of Toyama) and K. Matsuda (Tsinghua University) and is based on the extension of "PRD 74, 076007, (2006), S. Kanemura, D. Nomura, and K. Tsumura" -- Theory Group, KEK 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan Office : tel +81-29-879-6102 fax +81-29-864-5755 E-mail : tsumurak@post.kek.jp