KILC12

Session

ACFA Physics

24 Apr 2012, 08:30

Hotel Inter-Brugo EXCO

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)

Presentation materials

WebEX (4/24 08:00~)

WebEx_Meeting_invitation_ACFA_Physics_Arpil_24.htm

WebEX (4/25 08:00~)

WebEx_Meeting_invitation_ACFA_Physics_Arpil_25_morning.htm

WebEX (4/25 15:30~)

WebEx_Meeting_invitation_ACFA_Physics_Arpil_25_evening.htm

22. Recent progress for the LC: polarization and precision calculations (via WebEx)

Rohini Godbole (Indian Institute of Science)

24/04/2012, 08:30

23. Multi tau lepton signatures in leptophilic two Higgs doublet model at the ILC

Koji Tsumura (National Taiwan University)

24/04/2012, 09:10

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...

24. The supersymmetric Higgs sector with four doublets and its decoupling property

Tetsuo Shindou (Kogakuin University)

24/04/2012, 09:35

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...

25. Motivations for precision Higgs physics

Michael E. Peskin (SLAC)

24/04/2012, 14:00

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

26. Higgs branching fractions study in ILC

Hiroaki Ono (Nippon Dental University)

24/04/2012, 14:40

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...

27. Precision measurement of Higgs to gauge bosons couplings

Junping Tian (KEK)

24/04/2012, 15:05

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.

28. Higgs -> gamma gamma branching ratio

Constantino Calancha (KEK)

24/04/2012, 15:30

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.

30. Physics studies for a staged construction of CLIC

Frank Simon (MPI)

24/04/2012, 15:55

We present the status of a study of the physics performance of CLIC for a staged construction with three energy stages at 500 GeV, 1.4 TeV and 3 TeV. For each stage, detailed information on the luminosity spectrum and the background level, in particular of mini-jet production in two photon processes, is used in full detector simulations. At the first energy stage, the capability for a top...

126. Top quark studies at 500 GeV

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

25/04/2012, 08:30

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...

176. Top Higgs Yukawa coupling analysis - status report (via WebEx)

Hajrah Tabassam (Quaid-i-Azam University Islamabad)

25/04/2012, 09:10

At a linear collider, $e^{+}{e}^{-}\to t\overline{t}H$ 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...

127. Measuring very light gravitino with stau NLSP at the ILC

Ryo Katayama (University of Tokyo)

25/04/2012, 09:35

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...

29. Study of Higgs self-coupling at the ILC

Taikan Suehara (ICEPP, The University of Tokyo)

25/04/2012, 10:30

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.

46. Determination of sparticle properties in SUSY scenarios with small mass differences at the ILC

Mikael Berggren (DESY)

25/04/2012, 10:55

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.

47. Distinguishing MSSM and Dirac neutralinos at the ILC

Seong Youl Choi (Chonbuk National University)

25/04/2012, 11:20

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.

48. Probing strongly interacting W's at the ILC with polarized beams

Monalisa Patra (Indian Institute of Science)

25/04/2012, 11:45

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,...

49. F-term loop driven electroweak baryogenesis

Eibun Senaha (KIAS)

25/04/2012, 14:00

The nondecoupling phenomena of the Higgs sector is essential for successful electroweak baryogenesis and its collider test. It is known that in the 2HDM, the strong first order phase transition can be realized by the nondecoupling loop effects of the heavy Higgs bosons, and its effects inevitably lead to a significant deviation of the triple Higgs boson coupling from the standard model value...

50. Structure of dimension-six derivative interactions in pseudo Nambu-Goldstone N Higgs doublet models

Yohei Kikuta (KEK)

25/04/2012, 14:25

The composite Higgs is one of the candidates for the beyond the SM and the Linear Collider experiments can reveal the composite nature of the Higgs. In this talk, I derive the general structure of dimension-six derivative interactions in the N Higgs doublet models, where Higgs fields arise as pseudo Nambu-Goldstone modes of a strongly interacting sector. As phenomenological processes, I show...

128. Phenomenology of the Higgs triplet model at the ILC

Kei Yagyu (National Central University)

25/04/2012, 14:50

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...

129. Recent results from the Tevatron

Paul Grannis (State University of New York)

25/04/2012, 16:00

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.

130. Seesaw model with a loop-induced Dirac mass term and dark matter from $U(1{)}_{B-L}$ gauge symmetry breaking

Takehiro Nabeshima (University of Toyama)

25/04/2012, 16:40

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...

131. LHC and ILC implications of a 125 GeV Higgs boson in supersymmetry (via WebEx)

Oscar Stal (DESY)

25/04/2012, 17:05

In light of the recent hints from the LHC for a positive Higgs signal around 125 GeV, we discuss the possible interpretations of such a scenario in supersymmetry. We derive constraints on the parameters of the minimal supersymmetric extension of the SM, and discuss phenomenological implications for this model at the LHC and the ILC.

132. R-parity violation at LHC & ILC (via WebEx)

Benedikt Vormwald (DESY)

25/04/2012, 17:30

Supersymmetric models with R-parity violation (RPV) offer a broad range of interesting phenomenologies that can differ from R-parity conserving SUSY, depending of the strength of the breaking. The most important consequence of RPV is that the lightest supersymmetric particle is no longer stable and can decay into Standard Model particles. This makes RPV SUSY much harder to test at the LHC. In...