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Production cross sections of hyperons and charmed baryons from e+e− annihilation near s=10.52 GeV
Niiyama, M.,Sumihama, M.,Nakano, T.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Barberio, E.,Berger, M.,Bhardwaj, V. American Physical Society 2018 Physical Review D Vol.97 No.7
Interference Effect betweenϕandΛ(1520)Production Channels in theγp→K+K−pReaction near Threshold
Ryu, S. Y.,Ahn, J. K.,Nakano, T.,Ahn, D. S.,Ajimura, S.,Akimune, H.,Asano, Y.,Chang, W. C.,Chen, J. Y.,Daté,, S.,Ejiri, H.,Fujimura, H.,Fujiwara, M.,Fukui, S.,Hasegawa, S.,Hicks, K.,Horie, K.,Ho American Physical Society 2016 Physical Review Letters Vol.116 No.23
<P>The phi-Lambda(1520) interference effect in the gamma p -> K(+)K(-)p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between phi and Lambda(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K- pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the root s = 2.1 GeV bump structure in forward differential cross sections for phi photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.</P>
Measurement of time-dependent CP asymmetries in B0→KS0ηγ decays
Nakano, H.,Ishikawa, A.,Sumisawa, K.,Yamamoto, H.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bansal, V.,Behera, P.,Beleñ,o, C.,Bhuyan, American Physical Society 2018 Physical Review D Vol.97 No.9
<P>We report a measurement of time-dependent CP violation parameters in B-0 -> K-S(0)eta gamma decays. The study is based on a data sample, containing 772 x 10(6)B(B)over-bar pairs, that was collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain the CP violation parameters of S = -1.32 +/- 0.77(stat) +/- 0.36(syst) and A = -0.48 +/- 0.41(stat) f 0.07(syst) for the invariant mass of the K-S(0)eta system up to 2.1 GeV/c(2).</P>
OCT Findings in Patients With Recanalization of Organized Thrombi in Coronary Arteries
Kang, S.J.,Nakano, M.,Virmani, R.,Song, H.G.,Ahn, J.M.,Kim, W.J.,Lee, J.Y.,Park, D.W.,Lee, S.W.,Kim, Y.H.,Lee, C.W.,Park, S.W.,Park, S.J. Elsevier 2012 JACC CARDIOVASCULAR IMAGING Vol.5 No.7
Objectives: The purpose of this study was to determine the angiographic and optical coherence tomographic (OCT) characteristics of coronary lesions with recanalized thrombi. Background: Although spontaneous recanalization of thrombi has been reported pathologically, it is rarely recognized in clinical practice. Methods: Based on histopathologic features, recanalization of thrombi was defined by characteristics on OCT. Results: Recanalization of thrombi was identified in 6 patients (3 male, 3 female; median age 63 years; age range 54 to 72 years). Based on symptoms, 3 patients were diagnosed with unstable angina; 2 were diagnosed with stable angina; and 1, who had mitral stenosis and huge left atrial thrombi, was diagnosed with post-infarct angina. All had normal serum concentrations of cardiac markers at admission. Angiography showed irregular linear filling defects and haziness. Two patients with near total occlusion had Thrombolysis In Myocardial Infarction (TIMI) flow grade 1 and collaterals, whereas 4 patients had TIMI flow grade 3 and no collaterals. All patients showed OCT findings consistent with recanalized thrombi, which consisted of signal-rich, high backscattered septa that divided the lumen into multiple small cavities communicating with each other. These structures, which had smooth inner borders, created a ''Swiss cheese'' appearance. Percutaneous coronary intervention was performed in 5 patients with angiographic slow flow or inducible-ischemia as documented by invasive or noninvasive stress tests. The remaining 1 patient with restored coronary flow underwent mitral valve surgery and left atrial thrombectomy. Conclusions: OCT provided details on the characteristics of the organization of thrombi in both chronic total occlusion and subtotal narrowing. Coronary lesions containing recanalized thrombi were characterized by multiple small channels, with most showing functional significance.
T. NAKANO,S. MOMOZONO,S. AIZAWA 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
New lubrication mechanism for nanomachine is proposed. This mechanism utilizes the effect of diffusive double layer observed in hydrophobic colloidal solution. Basic idea of the theory is inspired by the research for possible mechanism of bacterial flagellar motor. In this study, formulation of this mechanism is achieved and numerical calculation is performed. It is shown that this mechanism can produce enough load capacitance. Furthermore not only load capacitance to sustain driving force of flagellar motor
Kim, S-H,Kim, E-J,Hitomi, M,Oh, S-Y,Jin, X,Jeon, H-M,Beck, S,Jin, X,Kim, J-K,Park, C G,Chang, S-Y,Yin, J,Kim, T,Jeon, Y-j,Song, J,Lim, Y C,Lathia, J D,Nakano, I,Kim, H Macmillan Publishers Limited 2015 CELL DEATH AND DIFFERENTIATION Vol.22 No.9
Glioblastomas (GBMs) maintain their cellular heterogeneity with glioma stem cells (GSCs) producing a variety of tumor cell types. Here we interrogated the oncogenic roles of Lim domain only 2 (LMO2) in GBM and GSCs in mice and human. High expression of LMO2 was found in human patient-derived GSCs compared with the differentiated progeny cells. LMO2 is required for GSC proliferation both in vitro and in vivo, as shRNA-mediated LMO2 silencing attenuated tumor growth derived from human GSCs. Further, LMO2 is sufficient to induce stem cell characteristics (stemness) in mouse premalignant astrocytes, as forced LMO2 expression facilitated in vitro and in vivo growth of astrocytes derived from Ink4a/Arf null mice and acquisition of GSC phenotypes. A subset of mouse and human GSCs converted into vascular endothelial-like tumor cells both in vitro and in vivo, which phenotype was attenuated by LMO2 silencing and promoted by LMO2 overexpression. Mechanistically, the action of LMO2 for induction of glioma stemness is mediated by transcriptional regulation of Jagged1 resulting in activation of the Notch pathway, whereas LMO2 directly occupies the promoter regions of the VE-cadherin gene for a gain of endothelial cellular phenotype. Subsequently, selective ablation of human GSC-derived VE-cadherin-expressing cells attenuated vascular formation in mouse intracranial tumors, thereby significantly prolonging mouse survival. Clinically, LMO2 expression was elevated in GBM tissues and inversely correlated with prognosis of GBM patients. Taken together, our findings describe novel dual roles of LMO2 to induce tumorigenesis and angiogenesis, and provide potential therapeutic targets in GBMs.
Mizutani, K.,Niiyama, M.,Nakano, T.,Yosoi, M.,Nozawa, Y.,Ahn, D. S.,Ahn, J. K.,Chang, W. C.,Chen, J. Y.,Daté,, S.,Gohn, W.,Hamano, H.,Hashimoto, T.,Hicks, K.,Hiraiwa, T.,Hotta, T.,Hwang, S. H.,I American Physical Society 2017 Physical Review C Vol.96 No.6
<P>Differential cross sections at t = t(min) and decay asymmetries for the gamma p -> phi p reaction have been measured using linearly polarized photons in the range 1.5 to 2.9 GeV. These cross sections were used to determine the Pomeron strength factor. The cross sections and decay asymmetries are consistently described by the t-channel Pomeron and pseudoscalar exchange model in the E-gamma region above 2.37 GeV. In the lower energy region, an excess over the model prediction is observed in the energy dependence of the differential cross sections at t = t(min). This observation suggests that additional processes or interference effects between Pomeron exchange and other processes appear near the threshold region.</P>
Supernova Relic Neutrino search with neutron tagging at Super-Kamiokande-IV
The Super-Kamiokande Collaboration,Zhang, H.,Abe, K.,Hayato, Y.,Iyogi, K.,Kameda, J.,Kishimoto, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakano, Y.,Nakayama, S.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda North-Holland 2015 Astroparticle physics Vol.60 No.-
A search for Supernova Relic Neutrinos ν@?<SUB>e</SUB>'s is first conducted via inverse-beta-decay by tagging neutron capture on hydrogen at Super-Kamiokande-IV. The neutron tagging efficiency is determined to be (17.74+/-0.04<SUB>stat.</SUB>+/-1.05<SUB>sys.</SUB>)%, while the corresponding accidental background probability is (1.06+/-0.01<SUB>stat.</SUB>+/-0.18<SUB>sys.</SUB>)%. Using 960days of data, we obtain 13 inverse-beta-decay candidates in the range of E<SUB>ν@?'e</SUB> between 13.3MeV and 31.3MeV. All of the observed candidates are attributed to background. Upper limits at 90% C.L. are calculated in the absence of a signal.