Determining gamma from B --> pi(pi) decays without the CP-asymmetry Cpi(0)pi(0) |
| |
Authors: | Bauer Christian W Rothstein Ira Z Stewart Iain W |
| |
Institution: | California Institute of Technology, Pasadena, California 91125, USA. |
| |
Abstract: | Factorization based on the soft-collinear effective theory (SCET) can be used to reduce the number of hadronic parameters in an isospin analysis of B --> pi(pi) decays by one. This gives a theoretically precise method for determining the CP violating phase gamma by fitting to the B --> pi(pi) data without Cpi(0)pi(0). SCET predicts that gamma lies close to the isospin bounds. With the current world averages we find gamma = 75 degrees +/- 2 degrees(+9 degrees)(-13 degrees), where the uncertainties are theoretical, then experimental. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|