Taku Izubuchi - RIKEN & Brookhaven National Laboratory

Mon, 01/28/2019 - 2:10pm
Pupin Hall Theory Center, 8th Floor


"Hadronic decay of tau lepton"

There has been a 3+ sigma deficit of the Cabibbo-Kobayashi Masukawa (CKM) 3-family-unitarity reported from the inclusive hadronic decay of tau lepton. We propose and apply a novel dispersive approach to determine the CKM matrix element Vus using inclusive hadronic tau decay data, and lattice QCD to address the issue of the quark-hadron duality violation. In addition to the results of the new analysis, other related topics of the inclusive hadronic decays and lattice QCD will be discussed.

About the speaker

Izubuchi has made important contributions in developing the mathematical tools for exploring QCD using a four-dimensional space-time lattice. He has contributed to the development of hardware and software for these numerical calculations using the world's most powerful supercomputers, and helped to identify and pursue the important physics problems these techniques can address—including searches for physics beyond the Standard Model and the exploration of fundamental asymmetries in the early universe. Among his list of scientific publications are several highly cited for their innovative methodology and insight into important physics questions. 

Izubuchi plays a leading role in the RIKEN (Japan)-BNL-Columbia and UKQCD collaboration, and had a vital role in the recent installation at Brookhaven of the powerful BlueGene/Q supercomputer for lattice computation. He also serves on the Scientific Program Committee of the USQCD collaboration, which oversees the allocation of nationally funded supercomputing resources for lattice calculations.

Izubuchi received his Ph.D. in 1997 from the University of Tokyo. He held a postdoctoral position at the University of Tsukuba for two years before becoming a tenured assistant professor at Kanazawa University. In 2008, he left that position to join Brookhaven Lab with a joint position as a RIKEN/BNL Research Center (RBRC) Fellow and a member of the High Energy Theory group in the Physics Department. In 2011, he became a founding group leader of the Computing Group of RBRC, and he is now a full-time member of the Physics Department.

More details can be found here.