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5 papers · 1 filter
Probing Anomalous Top-Quark Couplings Induced by Dim.6 Operators at Photon Colliders
Bohdan Grzadkowski, Zenro Hioki, Kazumasa Ohkuma +1
Possible anomalous top-quark couplings induced by SU(2) x U(1) gauge-invariant dimension-6 effective operators were studied in the process of t t-bar productions and decays at pola…
Fractional S^z excitation and its bound state around the 1/3 plateau of the S=1/2 Ising-like zigzag XXZ chain
Kouichi Okunishi, Takashi Tonegawa
We present the microscopic view for the excitations around the 1/3 plateau state of the Ising-like zigzag XXZ chain. We analyze the low-energy excitations around the plateau with t…
Probing Polarized Gluon Distributions through Charmed Hadron Production in Polarized pp Collisions at BNL--RHIC Energy
Toshiyuki Morii, Kazumasa Ohkuma
In order to extract information about behavior of polarized gluons in the nucleon, charmed hadron productions, i.e. D* meson and Lambda_c baryon productions, are studied in polariz…
Magnetic properties of the distorted diamond chain at T=0
Kiyomi Okamoto, Takashi Tonegawa, Makoto Kaburagi
We explore, at T=0, the magnetic properties of the antiferromagnetic distorted diamond chain described by the Hamiltonian ${\cal H} = \sum_{j=1}^{N/3}{J_1 ({\bi S}_{3j-1} \…
Photon yields from nitrogen gas and dry air excited by electrons
M. Nagano, K. Kobayakawa, N. Sakaki +1
In order to detect ultrahigh-energy cosmic rays (UHECR), atmospheric fluorescence light from the trajectory of the extensive air shower may be measured by mirror-photosensor system…