Seminar
Title: Precision study on rare inclusive B decays
Speaker: Prof. Qin Qin (HUST)
Time: 10:00 am, Friday, Nov. 8th, 2019
Place: R319, Theoretical Physics Division
Abstract: Rare inclusive B decays such as B - Xs(Xd)ll are interesting probes for physics beyond the Standard Model. Due to the complementarity to their exclusive counterparts, they might shed light on the anomalies currently seen in exclusive b-s transitions. By making use of operator product expansion, the rate of the decay can be calculated by systematic expansion of strong coupling and 1/mb. However, various long distance effects, especially those induced by charm loops, would pollute the calculation and reduce the precision. In the present work we revisit and improve the description of these effects in inclusive decays such as charmonium and light-quark resonances, nonfactorisable power corrections, and cascade decays. We then apply these results to a state-of-the-art phenomenological study of B - Xdll. Preliminary results for B - Xsll will also be presented.
秦溱，男，華中科技大學(xué)物理學(xué)院副教授。2011年于南京大學(xué)物理學(xué)院獲物理學(xué)專業(yè)學(xué)士學(xué)位，2016年于中科院高能所獲理論物理專業(yè)博士學(xué)位。其后在德國錫根大學(xué)從事博士后研究工作，2019年入職華中科技大學(xué)物理學(xué)院。長期研究粒子物理唯象學(xué)，目前主要領(lǐng)域?yàn)橹乜淇宋锢?，專注相關(guān)物理過程的精確計(jì)算，將標(biāo)準(zhǔn)模型理論預(yù)言與實(shí)驗(yàn)對比，從而尋找新物理信號。同時(shí)也關(guān)心對撞機(jī)物理和新物理模型唯象學(xué)。
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