5 papers
Studying Possible Anomalous Top-Quark Couplings at Photon Colliders
Bohdan Grzadkowski, Zenro Hioki, Kazumasa Ohkuma +1
Search for new-physics through possible anomalous t tbar gamma, tbW and gamma gamma H couplings which are generated by SU(2) X U(1) gauge-invariant dimension-6 effective operators…
Optimal-Observable Analysis of Possible New Physics Using the b-quark in gamma gamma -> tt -> bX
Bohdan Grzadkowski, Zenro Hioki, Kazumasa Ohkuma +1
We study possible anomalous top-quark couplings generated by SU(2) x U(1) gauge invariant dimension-6 effective operators, using the final b-quark momentum distribution in gamma ga…
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…
Charmed Hadron Production in Polarized pp Reactions as a Probe of Polarized Gluons in the Proton
Toshiyuki Morii, Kazumasa Ohkuma
To probe the behavior of polarized gluons in the proton, we propose the charmed hadron, such as Lambda_c and D^*, production in the forthcoming RHIC experiments. We found that the…
Charmed Hadron Production in Polarized pp Collisions
Toshiyuki Morii, Kazumasa Ohkuma
To extract information about polarized gluons in the proton, production of charmed hadrons, in particular, Λ_c^+ baryon in pp collisions was studied. We calculated the transverse m…