Time and Date
15:00-17:00, March 8^th, 2023

Title
"Precise determination of |V_{cb}| by renormalon subtraction"
by Yuuki Hayashi (Tohoku U.)

Venue (hybrid)
Room 745, Science Complex B (MAP H-03)

Zoom registration for participants:
https://us02web.zoom.us/meeting/register/tZwtduuqrzMtGNfqHxzgtvCA9eWDjF6e_f9A

Abstract
Predicting the physics of the B meson requires both perturbative and non-perturbative contributions simultaneously, otherwise theoretical accuracy would be limited. In particular, it is necessary to formulate a method for subtracting renormalons that rapidly increase the perturbative expansion from the point of view of perturbation theory. We have developed a new method to subtract renormalons using the Laplace transform. In this talk we discuss the application of the method to the semileptonic B meson decay for the precise determination of |V_{cb}|, one of the CKM matrix elements.

Point
GASP 1

Contact
Yusuke Tanimura (Physics, GP-PU),
E-mail: tanimura * nucl.phys.tohoku.ac.jp (Replace * with @)