### Conveners

#### ACFA Physics

- Shinya Kanemura (University of Toyama)

#### ACFA Physics

- Seong Youl Choi (Chonbuk National University)

#### ACFA Physics

- Seong Youl Choi (Chonbuk, Korea)

#### ACFA Physics

- Tomohiko Tanabe (University of Tokyo)

#### ACFA Physics

- Junping Tian (KEK)

#### ACFA Physics

- Timothy Barklow (SLAC)

Rohini Godbole
(Indian Institute of Science)

4/24/12, 8:30 AM

Koji Tsumura
(National Taiwan University)

4/24/12, 9:10 AM

We study the feasibility of Type-X two Higgs doublet model (THDM-X) at collider experiments. In THDM-X, new Higgs states are almost decaying into tau leptons. Such scalar bosons are less constrained by current experimental data, because production cross sections are not enhanced by quark Yukawa interaction, and decay products includes multiple missing neutrinos. In this talk, we discuss a...

Tetsuo Shindou
(Kogakuin University)

4/24/12, 9:35 AM

We consider extended Higgs sectors in SUSY SM in which extra chiral superfields are introduced to the MSSM. In such extended models, deviations from the MSSM can remain in predictions of several Higgs measurements by the non-decoupling effect, even if the extra scalars are all heavy. It is interesting to see the property of such non-decoupling effects in various model. In this talk, we focus...

Michael E. Peskin
(SLAC)

4/24/12, 2:00 PM

I will discuss a few theoretical models that motivate pushing the accuracy on Higgs branching ratios to the percent level.

Hiroaki Ono
(Nippon Dental University)

4/24/12, 2:40 PM

Recent LHC results indicate the light Higgs (115 < Mh < 131 GeV) and the possibility of the 250 GeV ILC machine is increasing. To catch up with these inputs, we update the Higgs BR results from LOI including H->WW* with concerning the several masses at the CM energy of 250 GeV. We also study the vvH BR at 1 TeV as a benchmarking process of DBD. In this talk, we present the latest results of...

Junping Tian
(KEK)

4/24/12, 3:05 PM

WWH and ZZH couplings are two of the fundamental couplings. Precision measurement of these two couplings are crucial to test the SM and constraint the new physics models. In this talk, we will present the WWH coupling measurement using vvH at 500 GeV and also the ZZH coupling by combining all the possible channels.

Constantino Calancha
(KEK)

4/24/12, 3:30 PM

The determination of the Higgs boson branching fractions is central to the ILC physics programme. In particular, the rare decay H -> gamma gamma is one of the benchmark process for the DBD. Assuming an integrated luminosity of 250 fb-1 with the ILD detector at sqrt(s)=250 Gev we present preliminary results on the estimation of the statistical uncertainty on this branching ratio.

Marcel Vos
(IFIC Valencia)
,
Roman Poeschl
(LAL)

4/25/12, 8:30 AM

A study of top quark production at the future International Linear Collider with a centre-of-mass energy of 500\,GeV has is presented. The emphasis is put on determining the sensitivity to physics beyond standard model. The analysis has been carried out with a full simulation of the ILD detector. The presentation introduces the top quark helicity as observable to increase the sensitivity to...

Hajrah Tabassam
(Quaid-i-Azam University Islamabad)

4/25/12, 9:10 AM

At a linear collider, $e^+e^- \to t\bar{t}H$ will give a direct measurement of top-Higgs Yukawa coupling. We present here the prospect of such measurement in the context of International Linear Collider at $\sqrt{s}=1$ TeV as an extension to our previous work at $\sqrt{s}=500$ GeV. The study will be constructed for a Standard Model Higgs boson with a mass of 120 GeV using the semi-leptonic and...

Ryo Katayama
(University of Tokyo)

4/25/12, 9:35 AM

We report on the full simulation study of measuring the O(1 eV) mass of the stable very light gravitino. Such a light gravitino typically appears in GMSB scenarios and is attractive from the point of view of cosmological constraints. Assuming NLSP stau of ~120 GeV mass and ~100 um/c lifetime, we simulate stau pair creation events at Ecm=500 GeV ILC with the ILD detector model. Tau decays are...

Taikan Suehara
(ICEPP, The University of Tokyo)

4/25/12, 10:30 AM

In SM, Higgs self-coupling is responsible for the EWSB and mass generation. It is almost impossible to measure it at LHC for a light Higgs. It's a crucial task to make the Higgs self-coupling measurement be possible at the ILC 500. In this talk, we will present the latest study based on the full detector simulation.

Mikael Berggren
(DESY)

4/25/12, 10:55 AM

Full and fast simulations studies of determination of sparticle masses and production cross-sections in SUSY scenarios with low mass differences is presented. Models that realise such spectra while respecting LHC limits, the LHC Higgs-hint as well as low energy and cosmological constrains are discussed.

Seong Youl Choi
(Chonbuk National University)

4/25/12, 11:20 AM

In this talk, I describe how to distinguish MSSM neutralinos from Dirac neutralinos by exploiting simple kinematic variables at various relevant processes available the ILC.

Monalisa Patra
(Indian Institute of Science)

4/25/12, 11:45 AM

We study the possibility of fingerprinting a strongly interacting $W$ boson sector, consistent with present day LHC searches at the ILC with longitudinal as well as transversely polarized electron and positron beams. We account for the final state interaction using a suitable Omn\`es formalism in terms of a plausible resonance description, and carry out thorough analyses of cross sections,...

Kei Yagyu
(National Central University)

4/25/12, 2:50 PM

Higgs triplet fields are introduced in several new physics models beyond the SM such as the type II seesaw model, the left-right symmetric model and so on. Therefore, studying properties of the Higgs sector with triplet fields are important to clarify new physics models. In this talk, we focus on the Higgs triplet model, where Y=1 triplet field is added to the SM. We first discuss the...

Paul Grannis
(State University of New York)

4/25/12, 4:00 PM

Following the shutdown of the Tevatron in 2011, the CDF and DZero experiments are analyzing the full data set, focusing on those measurements that are unique or that complement the LHC experiments. I will summarize recent results that bear on our understanding of QCD, heavy flavor states, and electroweak symmetry breaking.

Takehiro Nabeshima
(University of Toyama)

4/25/12, 4:40 PM

I would like to talk about the TeV-scale seesaw model in which U(1)_{B-L} gauge symmetry can be the common origin of neutrino masses, the dark matter mass, and stability of the dark matter. In our model, Majorana masses of right handed neutrinos and Dirac mass of dark matter are induced by spontaneous U(1)_{B-L} breaking. After electroweak symmetry breaking, light neutrino masses are generated...