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19912026
Showing 2003 · hep-phShow all

28 papers · 2 filters

hep-ph2003★ 182 cited

Predictions for g-2 of the muon and alpha_QED(M_Z^2)

K. Hagiwara, A. D. Martin, Daisuke Nomura +1

We calculate (g-2) of the muon and the QED coupling alpha(M_Z^2), by improving the determination of the hadronic vacuum polarization contributions and their uncertainties. We inclu…

hep-ph2003★ 14 cited

Lifting degeneracies in the oscillation parameters by a neutrino factory

Mayumi Aoki, Kaoru Hagiwara, Naotoshi Okamura

We study the potential of a very long baseline neutrino oscillation experiment with a neutrino factory and a large segmented water-Cerenkov calorimeter detector in resolving the de…

hep-ph2003★ 55 cited

Higgs-mediated muon-electron conversion process in supersymmetric seesaw model

Ryuichiro Kitano, Masafumi Koike, Shinji Komine +1

We study the effect of the Higgs-exchange diagram for the lepton flavor violating muon-electron conversion process in nuclei in the supersymmetric seesaw model. The contribution is…

hep-ph2003★ 8 cited

Color Ferromagnetism of Quark Matter and Quantum Hall States of Gluons in SU(3) Gauge Theory

A. Iwazaki, O. Morimatsu, T. Nishikawa +1

We show a possibility that a color ferromagnetic state exists in SU(3) gauge theory of quark matter with two flavors. Although the state involves three types of unstable modes of g…

hep-ph2003★ 48 cited

Full order alpha electroweak corrections to double Higgs-strahlung at the linear collider

G. Belanger, F. Boudjema, J. Fujimoto +4

We present the full order alpha electroweak radiative corrections to the double Higgs-strahlung process e+e- --> ZHH. The computation is performed with the help of GRACE-loop. Afte…

hep-ph2003★ 75 cited

Neutrino Production of Resonances

Emmanuel A. Paschos, Makoto Sakuda, Ji--Young Yu

We take a fresh look at the analysis of resonance production by neutrinos. We consider three resonances and with a detailed discussion of their form facto…

hep-ph2003★ 3 cited

Cosmological gravitino problem confronts electroweak physics

Gi-Chol Cho, Yosuke Uehara

A generic feature of gauge-mediated supersymmetry breaking models is that the gravitino is the lightest supersymmetric particle (LSP). In order not to overclose the universe, the g…

hep-ph2003★ 135 cited

GRACE at ONE-LOOP: Automatic calculation of 1-loop diagrams in the electroweak theory with gauge parameter independence checks

G. Belanger, F. Boudjema, J. Fujimoto +4

We describe the main building blocks of a generic automated package for the calculation of Feynman diagrams. These blocks include the generation and creation of a model file, the g…

hep-ph2003★ 57 cited

Full order_alpha electroweak and order alpha_s corrections to e^+e^- --> t t H

G. Belanger, F. Boudjema, J. Fujimoto +5

We present the full electroweak radiative corrections to associated Higgs top pair production in collisions. We combine these results with a new calculation…

hep-ph2003★ 1 cited

Neutrino Masses and Beyond from Supersymmetry

Otto C. W. Kong

A generic form of the supersymmetric SM naturally gives rise to the lepton number violating neutrino masses and mixings, without the need for extra superfields beyond the minimal s…

hep-ph2003★ 2 cited

Remarks on the recently observed B decays into and

C. S. Kim, Sechul Oh

In light of the recent experimental results on decays and from Belle, we study the type decays, $B^{\…

hep-ph2003★ 88 cited

B-Bbar mixing in unquenched lattice QCD

JLQCD Collaboration, S. Aoki, M. Fukugita +13

We present an unquenched lattice calculation for the transition amplitude. The calculation, carried out at an inverse lattice spacing = 2.22(4) GeV, incorpora…

hep-ph2003★ 62 cited

A Possibility of large electro-weak penguin contribution in B -> K pi modes

Tadashi Yoshikawa

We discuss about a possibility of large electro-weak penguin contribution in B -> K pi from recent experimental data. The several relations among the branching ratios which realize…

hep-ph2003★ 29 cited

Exploring flavor structure of supersymmetry breaking from rare B decays and unitarity triangle

Toru Goto, Yasuhiro Okada, Yasuhiro Shimizu +2

We study effects of supersymmetric particles in various rare B decay processes as well as in the unitarity triangle analysis. We consider three different supersymmetric models, the…

hep-ph2003★ 9 cited

Neutrino Magnetic Moments and Minimal Supersymmetric SO(10) Model

Takeshi Fukuyama, Tatsuru Kikuchi, Nobuchika Okada

We examine supersymmetric contributions to transition magnetic moments of Majorana neutrinos. We first give the general formula for it. In concrete evaluations, informations of neu…

hep-ph2003★ 32 cited

Probing the CP nature of the Higgs bosons by top-pair production at photon linear colliders

Eri Asakawa, Kaoru Hagiwara

We study effects of heavy Higgs bosons on the top-pair production process at photon linear colliders. The interference patterns between the resonant Higgs-production amplitudes and…

hep-ph2003★ 111 cited

Exclusive J/ψProductions at e^+ e^- Colliders

K. Hagiwara, E. Kou, C. -F. Qiao

Exclusive quarkonium pair production in electron-positron collisions is studied in non-relativistic QCD. The obtained cross section for J/ψ+ η_c production in the leading order is…

hep-ph2003★ 9 cited

Heavy Baryonic Decays of Λ_b \to Λη^{(\prime)} and Nonspectator Contribution

M. R. Ahmady, C. S. Kim, Sechul Oh +1

We calculate the branching ratios of the hadronic Λ_b decays to ηand η^\prime in the factorization approximation where the form factors are estimated via QCD sum rules and the pole…

hep-ph2003★ 75 cited

Tau Polarization in Tau-Neutrino Nucleon Scattering

K. Hagiwara, K. Mawatari, H. Yokoya

We investigate the spin polarization of τ^{\pm} leptons produced in ν_τ and \barν_τ nucleon scattering via charged currents. Quasi-elastic scattering, Δresonance production and dee…

hep-ph2003★ 16 cited

B -> eta^(\prime) l nu decays and the flavor-singlet form factor

C. S. Kim, Sechul Oh, Chaehyun Yu

We study semileptonic decays B -> eta^(\prime) l nu, taking into account the flavor-singlet contribution (F^{singlet}_+) to the B -> eta^(\prime) form factors, which arises from th…

hep-ph2003★ 9 cited

Effect of pion thermal width on the sigma spectrum

Yoshimasa Hidaka, Osamu Morimatsu, Tetsuo Nishikawa +1

We study the effect of thermal width of on the spectral function of applying a resummation technique called optimized perturbation theory at finite temperature () to ${\…

hep-ph2003★ 3 cited

What can we learn from phi_1 and B_d^0 -> pi^+ pi^- ?

Tadashi Yoshikawa

We discuss what we can understand from and decay mode. Using a convention without weak phases and , we can solve the parameters from the time-d…

hep-ph2003★ 67 cited

Lepton Flavor Violating Processes and Muon g-2 in Minimal Supersymmetric SO(10) Model

Takeshi Fukuyama, Tatsuru Kikuchi, Nobuchika Okada

In the recently proposed minimal supersymmetric SO(10) model, the neutrino Dirac Yukawa coupling matrix, together with all the other fermion mass matrices, is completely determined…

hep-ph2003★ 9 cited

Large Direct CP Violation in B -> phi phi Xs Decays

Masashi Hazumi

We present a novel method to search for a new CP-violating phase in b -> ss~ss~s transition using B -> phi phi Xs decays, where Xs represents a final state with a specific strange…