TY - JOUR
T1 - Testing factorization in B→D(*) X decays
AU - Bauer, C. W.
AU - Grinstein, B.
AU - Pirjol, D.
AU - Stewart, I. W.
PY - 2003
Y1 - 2003
N2 - In QCD the amplitude for B̄0→D(*)+ π- factorizes in the large Nc limit or in the large energy limit Q ≫ΛQCD where Q = {mb, m c, mb-mc}. Data also suggest factorization in the exclusive processes B →D*π+ π- π- π0 and B→D*ωπ-; however, by themselves neither a large Nc nor a large Q can account for this. We give exact large Nc relations among isospin amplitudes for B̄→D(*)X and B̄→D(*)X, which can be used to test factorization through exclusive or inclusive measurements. Noting that the condition for large energy release in B̄0→D+ π- is enforced by the small velocity limit, mb≫ mb-mc≫Λ, we propose that the combined large Nc and SV limits justify factorization in B→D(*)X. This combined limit is tested with the B→D*X inclusive decay spectrum measured by CLEO.
AB - In QCD the amplitude for B̄0→D(*)+ π- factorizes in the large Nc limit or in the large energy limit Q ≫ΛQCD where Q = {mb, m c, mb-mc}. Data also suggest factorization in the exclusive processes B →D*π+ π- π- π0 and B→D*ωπ-; however, by themselves neither a large Nc nor a large Q can account for this. We give exact large Nc relations among isospin amplitudes for B̄→D(*)X and B̄→D(*)X, which can be used to test factorization through exclusive or inclusive measurements. Noting that the condition for large energy release in B̄0→D+ π- is enforced by the small velocity limit, mb≫ mb-mc≫Λ, we propose that the combined large Nc and SV limits justify factorization in B→D(*)X. This combined limit is tested with the B→D*X inclusive decay spectrum measured by CLEO.
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U2 - 10.1103/PhysRevD.67.014010
DO - 10.1103/PhysRevD.67.014010
M3 - Article
AN - SCOPUS:0037285532
SN - 0556-2821
VL - 67
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 1
M1 - 014010
ER -