重いクォ-クの有効理論とストレンジ・ハドロン

名古屋大学Nagoya University博士(工学)重いクオークの有効理論(Heavy Quark Effective Theory)は､重いクオークの質量を無限大としたときに現れるスピン･フレーバー対称性に基づくQCDの有効理論である｡この有効理論はbあるいはcクオークを含んだハドロンの現象論的解析に大きな威力を発揮してきた｡特に､セミ･レプトニック崩壊β→D^*l\bar{ν}_lのデータを用いて､小林－益川行列の要素|V_cd|をmodel-independentに決定する可能性を与え､現在の素粒子物理学の課題に対して､重要な役割を果たした｡重いクオークの有効理論には､\bar{Λ}/mQを展開パラメーターとする系統的な補正の導入が可能であり､この補正を考慮することにより､ハドロンの質量を解析することができるようになる｡更にまたsクオークがこの有効理論の枠組みに入る可能性が生じる｡重いクオークの有効理論に基づく質量公式をsクオークに適用することにより､基底状態のハドロンの質量を再現することができる｡この質量公式はQ\bar{q}メソン､Qqqバリオンのみならず､QQqバリオンにも適用可能なものである｡重いクォークの有効理論において励起状態を考察するとき､そのハドロンの｢軽い自由度｣のスピン･パリティを同定することが重要な課題となる｡この同定は､重いクォークのスピン対称性から生じる崩壊振幅の間の関係を､調べることによって可能となる。この考えをsクオークに適用することで､ストレンジ･メソンの励起状態も､｢軽い自由度｣のスピン･パリティで分類し得ることが明らかとなる｡BメソンとDメソンのヤミレプトニック崩壊についての実験データは、同一の形状因子を用いて再現される。これらの現象論的考察からは､sクォークへの重いクォークの有効理論の適用の正当性が示唆される。更に､このセミレプトニック崩壊の実験データを用いて､展開パラメーター\bar{Λ}がs､c､bクォークのフレーバーに依存しない量であることが示され､重いクォークの有効理論のsクオークへの適用可能性が検証される｡重いクォークの有効理論をsクォークに適用し､その有効性を確立したことは重いクォークの有効理論の発展であり､更に1/m_Q補正の効果を知る上で重要な示唆を与えるものである｡名古屋大学博士学位論文 学位の種類:博士(理学) (課程) 学位授与年月日:平成7年3月27日doctoral thesi

The impact of the combination of kidney and physical function on cognitive decline over 2 years in older adults with pre-dialysis chronic kidney disease

application/pdfClinical and Experimental Nephrology. 2019, 23 (6), P.756-762journal articl

ＲＤＤ調査の現状と今後 : 携帯電話番号を対象にする場合の課題〔パネルディスカッション〕

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Upper Bound on the Decay τ→μγ from the Belle Detector

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Corrosion Diagnosis Investigation of Archaeological Iron Objects in Exhibition Case of Tottori Mukibanda Yayoi Settlement Site

departmental bulletin pape

SOME OSCILLATION THEOREMS FOR THIRD ORDER NON-LINEAR DIFFERENTIAL EQUATIONS

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Intracellular concentrations of TYMS mRNA and hTS.

*<p>Using an estimated cell volume of 1.86*10⁻¹² L.</p><p>Intracellular concentrations of hTS protein and TYMS mRNA are indicated. The amounts of hTS protein (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047318#pone.0047318.s002" target="_blank">figure S2</a>) and TYMS mRNA in the pull down fraction after immunoprecipitation are also shown. Antibody against Beta-tubulin was used to evaluate the non-specific binding between TYMS mRNA and a generic protein. The non-specific interaction between mRNAs and hTS protein was checked by quantification of GAPDH mRNA bound to hTS in the pull down fraction. (Intracellular concentration: n = 5, error = ±S.D. Pull down amount: n = 2, error = ±S.E.)</p

Measurements of TS mRNA stability.

<p>The level of TS mRNA was determined in 2008 cells (panel A) and C13* cells (panel B) by Real Time PCR at different times after the addition of DRB (inhibitor of RNA pol II). Results represent the mean of three separate experiments. Statistical significance was estimated by two-tailed unequal variance Student's t-test comparing samples treated with DRB with samples treated with DRB+5-FU at each selected time, (n = 3). Error bars indicate S.D.</p

Role of TS mRNA synthesis in TS protein up-regulation.

<p>The concentration of TS protein in 2008 (panel A) and C13* cells (panel B) was determined by Western blotting at various times after the addition of 5-FU to the control media (closed squares) and DRB (inhibitor of RNA pol II)-treated cells (closed triangles). For each time selected 10 µg of protein extract was resolved in SDS-PAGE (12%) and the TS protein amount is given with respect to time 0. Results represent the mean of five separate experiments. Red Ponceau staining of the membranes prior to immune-detection was used as loading control <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047318#pone.0047318-RomeroCalvo1" target="_blank">[66]</a> (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047318#pone.0047318.s003" target="_blank">Figure S3</a>). Immunodetection of typical experiment is shown in the bottom part of each panel. Statistical significance was estimated by two-tailed with unequal variance Student's t-test comparing samples treated with 5-FU with samples treated with 5-FU+DRB at each selected time (*P<0.05; **P<0.01, n = 5). Error bars indicate S.D.</p

Effects of sequential combination of 5-FU with cDDP and DENSpm on SQ values in 2008 and C13* cells.

<p>Synergism of growth inhibition was determined by treatment of cells with 5-FU, DENSpm and cDDP alone and in sequential combination where the first drug was added at Day 1 and the second drug was added at Day 2. Counting the cell biomass was done at Day 4. Synergism Quotients (SQ) have been calculated as reported in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047318#s2" target="_blank">material and methods</a>. The concentration of 5-FU was chosen to obtain values for percentage growth inhibition no greater than 30% when added alone. Statistical significance was estimated by two-tailed paired Student's t-test comparing the samples where 5-FU was added before the other drug with the samples where 5-FU was added after the other drug. (^a,b,c,d P<0.05, n = 3, error = standard deviation (SD)).</p