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Search Results: 1 - 10 of 138822 matches for " K. Tsuno "
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Recent Results of High $p_{T}$ Physics at the CDF II
Soushi Tsuno
Physics , 2005,
Abstract: The Tevatron Run II program is in progress since 2001. The CDF experiment have accumulated roughly five times more data than in Run I, with much improved detectors. Preliminary results from the CDF experiment are presented. We focus on the recent high $p_{T}$ physics results in Tevatron Run II program.
Integration of GRACE and PYTHIA
K. Sato,S. Tsuno,J. Fujimoto,T. Ishikawa,Y. Kurihara,S. Odaka
Physics , 2001, DOI: 10.1063/1.1405307
Abstract: We have successfully developed a technique to integrate an automatic event-generator generation system GRACE and a general-purpose event generator framework PYTHIA. The codes generated by GRACE are embedded in PYTHIA in the created event generator program. The embedded codes give information on parton-level hard interactions directly to PYTHIA. The choice of PDF is controlled by the ordinary parameter setting in PYTHIA. This technique enables us to create easy-to-handle event generators for any processes in hadron collisions. Especially, in virtue of large capability of GRACE, we can easily deal with those processes containing many (four or more) partons in the final state, such as multiple heavy particle productions. This project is being carried out as a collaboration between the Japanese Atlas group and the Minami-Tateya group, aiming at developing event generators for Tevatron and LHC experiments.
New Method for Reconstructing Effective Top Quark Spin
Y. Sumino,S. Tsuno
Physics , 2005, DOI: 10.1016/j.physletb.2005.12.068
Abstract: We propose a new method for reconstructing an effective spin direction of a semi-leptonically decayed top quark. The method is simple: for instance, it does not require the spin information of the antitop quark in a ttbar event. The reconstructed effective spin is expected to be useful in hadron collider experiments. We demonstrate its usefulness in an analysis of the top decay vertex.
Multi Anode Photomultiplier Tube Reliability Assessment for the JEM-EUSO Space Mission
H. Prieto-Alfonso,L. del Peral,M. Casolino,K. Tsuno,T. Ebisuzaki,M. D. Rodríguez Frías,JEM-EUSO Collaboration
Physics , 2015, DOI: 10.1016/j.ress.2014.08.014
Abstract: Reliability assessment in concerned with the analysis of devices and systems whose individual components are prone to fail. This reliability analysis documents the process and results of reliability determination of the JEM-EUSO photomultiplier tube component using the methods 217 Plus. Quantum efficiency degradation and radiation hardness assurance. In conclussion, the levels of damage suffered by the PMTs which comprise the focal surface of JEM-EUSO Space Telescope, are acceptable. The results show as well the greatest contribution to the failure is due to radiation SET. The guaranteed performance of this equipment is a 99.45 per cent, an accepted value of reliability thus fulfilling the objectives and technological challenges of JEM-EUSO.
Aqua{4,4′,6,6′-tetrafluoro-2,2′-[(piperazine-1,4-diyl)dimethylene]diphenolato}copper(II)
Koji Kubono,Yuki Tsuno,Keita Tani,Kunihiko Yokoi
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810040080
Abstract: In the title compound, [Cu(C18H16F4N2O2)(H2O)], the CuII atom shows a distorted square-pyramidal coordination geometry with the N,N′,O,O′-tetradentate piperazine–diphenolate ligand forming the basal plane. The apical site is occupied by the O atom of a coordinated water molecule. Neighbouring complexes are associated through intermolecular O—H...O and O—H...F hydrogen bonds between the water molecule and a phenolate O atom or an F atom from an adjacent ligand, respectively, forming a centrosymmetric dimer. Dimers are linked by additional intermolecular C—H...O and C—H...F hydrogen bonds, giving infinite chains propagating along the a axis.
4,4′-Dichloro-2,2′-(piperazine-1,4-diyldimethylene)diphenol
Koji Kubono,Yuki Tsuno,Keita Tani,Kunihiko Yokoi
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808035769
Abstract: In the titile compound, C18H20Cl2N2O2, the piperazine ring adopts a chair conformation. The molecule has a non-crystallographic inversion centre in the middle of the piperazine ring at approximate position (3/4, 1/8, 3/8). There are intramolecular O—H...N hydrogen bonds forming S(6) ring motifs. Intermolecular C—H...O hydrogen bonds generate antiparallel C(5) chain motifs propagating along the b axis, forming sheets parallel to the bc plane with a first-level graph-set S(6)C(5)R66(26).
A monoclinic polymorph of 4,4′-dichloro-2,2′-(piperazine-1,4-diyldimethylene)diphenol
Koji Kubono,Yuki Tsuno,Keita Tani,Kunihiko Yokoi
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808038750
Abstract: The titile compound, C18H20Cl2N2O2, crystallizes as a monoclinic form in the space group P21/n, with Z′ = 1/2. It is polymorphic with the previously reported orthorhombic form [Kubono, Tsuno, Tani & Yokoi (2008). Acta Cryst. E64, o2309]. In the present polymorph, the molecule lies on a crystallographic inversion centre at the piperazine ring centroid. An intramolecular O—H...N hydrogen bond forms an S(6) ring motif. Intermolecular C—H...O hydrogen bonding generates a C(5) chain motif propagating along the b axis, forming sheets parallel to (overline{2}02) with a first-level graph set S(6)C(5)R66(34).
Transmission electron microscopic observations of nanobubbles and their capture of impurities in wastewater
Uchida Tsutomu,Oshita Seiichi,Ohmori Masayuki,Tsuno Takuo
Nanoscale Research Letters , 2011,
Abstract: Unique properties of micro- and nanobubbles (MNBs), such as a high adsorption of impurities on their surface, are difficult to verify because MNBs are too small to observe directly. We thus used a transmission electron microscope (TEM) with the freeze-fractured replica method to observe oxygen (O2) MNBs in solutions. MNBs in pure water and in 1% NaCl solutions were spherical or oval. Their size distribution estimated from TEM images close to that of the original solution is measured by light-scattered methods. When we applied this technique to the observation of O2 MNBs formed in the wastewater of a sewage plant, we found the characteristic features of spherical MNBs that adsorbed surrounding impurity particles on their surface. PACS: 68.03.-g, 81.07.-b, 92.40.qc
Longitudinal Changes in the Government-Certified Index Stage and Requisite Costs for Long-Term Care Insurance System among the Community-Dwelling Demented Elderly in Japan
Shunichiro Shinagawa,Shiori Nakamura,Makoto Iwamoto,Norifumi Tsuno
International Journal of Alzheimer's Disease , 2013, DOI: 10.1155/2013/164919
Abstract:
Search for Anomalous Couplings in Top Decay at Hadron Colliders
S. Tsuno,I. Nakano,Y. Sumino,R. Tanaka
Physics , 2005, DOI: 10.1103/PhysRevD.73.054011
Abstract: We present a quantitative study on sensitivities to the top-decay anomalous couplings, taking into account realistic experimental conditions expected at Tevatron and LHC. A double angular distribution of W and charged lepton in the top decay is analyzed, using ttbar events in the lepton+jets channel. In order to improve sensitivities to the anomalous couplings, we apply two techniques: (1) We use a likelihood fitting method for full kinematical reconstruction of each top event. (2) We develop a new effective spin reconstruction method for leptonically-decayed top quarks; this method does not require spin information of the antitop side. For simplicity, we neglect couplings of right-handed bottom quark as well as CP violating couplings. The 95% C.L. estimated bound on a ratio of anomalous couplings reads -0.81 < f_2/f_1 < -0.70, -0.12
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