Showing 2004 · hep-phShow all

54 papers · 2 filters

hep-ph2004★ 1 cited

Nuclear modification of valence-quark distributions and its effects on NuTeV sin^2 theta_W anomaly

M. Hirai, S. Kumano, T. -H. Nagai

We investigated a nuclear modification difference between up- and down-valence quark distributions by analyzing structure function F_2 and Drell-Yan cross-section ratios. Although…

hep-ph2004★ 46 cited

Higgs Masses in the Minimal SUSY SO(10) GUT

Takeshi Fukuyama, Amon Ilakovac, Tatsuru Kikuchi +2

We explicitly show that minimal SUSY SO(10) Higgs-Higgsino mass matrices evaluated by various groups are mutually consistent and correct. We comment on the corresponding results of…

hep-ph2004★ 20 cited

Nuclear modification difference between u_v and d_v distributions and its relation to NuTeV sin^2 theta_W anomaly

M. Hirai, S. Kumano, T. -H. Nagai

We investigate a possible nuclear correction to the NuTeV measurement of the weak-mixing angle sin^2 theta_W. In particular, a nuclear modification difference between u_v and d_v d…

hep-ph2004★ 21 cited

Perturbative SO(10) Grand Unification

Darwin Chang, Takeshi Fukuyama, Yong-Yeon Keum +2

We consider a phenomenologically viable SO(10) grand unification model of the unification scale around GeV which reproduces the MSSM at low energy and allows pertu…

hep-ph2004★ 170 cited

Electroweak baryogenesis and quantum corrections to the triple Higgs boson coupling

Shinya Kanemura, Yasuhiro Okada, Eibun Senaha

A phenomenological consequence of electroweak baryogenesis is studied in connection with the Higgs physics. In a two Higgs double model, the first order phase transition can be str…

hep-ph2004★ 1 cited

Yukawa Matrix for the Neutrino and Lepton Flavour Violation

S. Kanemura, K. Matsuda, T. Ota +3

We estimate the magnitude of Lepton Flavour Violation (LFV) from the phase of the neutrino Yukawa matrix. In the minimal supersymmetric standard model with right-handed neutrinos,…

hep-ph2004

Exploring Leptonic CP Violation with Combined Analysis of Reactor and Neutrino Superbeam Experiments

Hiroaki Sugiyama

We investigate the possibility to find the leptonic CP-violation by combining the reactor experiment with the superbeam experiment without antineutrino superbeam. We show also how…

hep-ph2004★ 52 cited

Recent results from lattice calculations

Shoji Hashimoto

Recent results from lattice QCD calculations relevant to particle physics phenomenology are reviewed. They include the calculations of strong coupling constant, quark masses, kaon…

hep-ph2004★ 6 cited

Theta++ from QCD sum rule

Tetsuo Nishikawa, Yoshiko Kanada-En'yo, Osamu Morimatsu +1

We study the pentaquark with and I=1 () in the QCD sum rule approach. We derive the QCD sum rules for positive and negative parity states of the pentaq…

hep-ph2004★ 36 cited

Study of Black Holes with the ATLAS detector at the LHC

Junichi Tanaka, Taiki Yamamura, Shoji Asai +1

We evaluate the potential of the ATLAS detector for discovering black holes produced at the LHC, as predicted in models with large extra dimensions where quantum gravity is at the…

hep-ph2004★ 2 cited

Mass and Cross-section Measurements of Chargino at Linear Colliders in Large tan(beta) Case

Yukihiro Kato, Keisuke Fujii, Teruki Kamon +2

The lighter chargino pair production () is one of key processes for determination of supersymmetric parameters at a linear collider. If…

hep-ph2004★ 13 cited

Spin-3/2 pentaquark in the QCD sum rule

Tetsuo Nishikawa, Yoshiko Kanada-En'yo, Yoshihiko Kondo +1

We study and pentaquark states with in the QCD sum rule approach. The QCD sum rule for positive parity states and that for negative parity are…

hep-ph2004★ 408 cited

Physics Interplay of the LHC and the ILC

LC Study Group, G. Weiglein, T. Barklow +120

Physics at the Large Hadron Collider (LHC) and the International e+e- Linear Collider (ILC) will be complementary in many respects, as has been demonstrated at previous generations…

hep-ph2004★ 58 cited

On Measurements Using Decays

Alex Bondar, Tim Gershon

We point out that in decays of the type , where the neutral meson is an admixture of and , there is an effective strong phase differen…

hep-ph2004★ 20 cited

Physics prospects of future neutrino oscillation experiments in Asia

Kaoru Hagiwara

The three neutrino model has 9 physical parameters, 3 neutrino masses, 3 mixing angles and 3 CP violating phases. Among them, neutrino oscillation experiments can probe 6 parameter…

hep-ph2004

Narrow Pentaquark States in a Quark Model with Antisymmetrized Molecular Dynamics

Y. Kanada-En'yo, O. Morimatsu, T. Nishikawa

The exotic baryon is studied with microscopic calculations in a quark model by using a method of antisymmetrized molecular dynamics(AMD). We predict narrow state…

hep-ph2004★ 3 cited

Unravelling soft components in the shape function for inclusive B decays

Hiroyuki Kawamura, Jiro Kodaira, Kazuhiro Tanaka

In the heavy-quark limit, the decay spectrum for radiative and semileptonic inclusive B-meson decays is determined by a universal structure function, i.e. the shape function. We st…

hep-ph2004★ 56 cited

Mixing-Induced CP Violation in B -> P_1 P_2 gamma in Search of Clean New Physics Signals

David Atwood, Tim Gershon, Masashi Hazumi +1

We show that in a decay of the form B_d or B_s-> P_1 P_2 gamma (where P_1 and P_2 are pseudoscalar mesons), through a flavor changing dipole transition, time dependent oscillations…

hep-ph2004★ 7 cited

Comparison of electron-nucleus quasi-elastic cross sections using spectral functions with (e,e') data from 0.5 GeV to 1.5 GeV and effects on neutrino quasi-elastic cross sections

Hiroki Nakamura, Ryoichi Seki, Makoto Sakuda

We carry out a relativistic calculation of the cross sections of electron-16O and -12C quasi-elastic scattering and quasi-free Delta production and compare with the (e,e') data sys…

hep-ph2004★ 2 cited

Phase contribution to LFV

S. Kanemura, K. Matsuda, T. Ota +3

We analyze the phase effect of the neutrino Yukawa matrix in the context of the Minimal Supersymmetric Standard Model with right-handed neutrinos. Its effect can change the Lepton…

hep-ph2004★ 8 cited

Systematic limits on sin^2{2theta_{13}} in neutrino oscillation experiments with multi-reactors

H. Sugiyama, O. Yasuda, F. Suekane +1

Sensitivities to sin^2{2theta_{13}} without statistical errors (``systematic limit'') are investigated in neutrino oscillation experiments with multiple reactors. Using an analytic…

hep-ph2004★ 34 cited

Top Spin Correlations in Theories with Large Extra-Dimensions at the Large Hadron Collider

Masato Arai, Nobuchika Okada, Karel Smolek +1

In theories with large extra dimensions, we study the top spin correlations at the Large Hadron Collider. The s-channel process mediated by graviton Kaluza-Klein modes contributes…

hep-ph2004★ 45 cited

Tauonic B decays in the Minimal Supersymmetric Standard Model

Hideo Itoh, Shinji Komine, Yasuhiro Okada

We study new physics effects on B decay processes including a final particle, namely and . An important feature of these processes is that a charged Higg…

hep-ph2004★ 245 cited

Higgs coupling constants as a probe of new physics

Shinya Kanemura, Yasuhiro Okada, Eibun Senaha +1

We study new physics effects on the couplings of weak gauge bosons with the lightest CP-even Higgs boson (), , and the tri-linear coupling of the lightest Higgs boson, $hhh…