Abstract
An all orders proof of factorization is given for B̄0→D+π- and B-→D0π-, in the limit where the heavy quark masses approach infinity. In particular, three types of factorization are distinguished. First, the generalized factorization of matrix elements of four quark operators into a form factor describing the B → D transition and a convolution of a short distance coefficient with the pion wave function is proved. A second type of factorization, between hard and infrared scales, is related to defining the correct effective theory. Finally, a third type is factorization theorems between soft and collinear degrees of freedom.
Original language | English |
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Article number | 201806 |
Pages (from-to) | 201806/1-201806/4 |
Journal | Physical Review Letters |
Volume | 87 |
Issue number | 20 |
State | Published - 12 Nov 2001 |