Power Corrections in Charmless Nonleptonic B Decays: Annihilationis Factorizable and Real

Journal Article · Tue Oct 10 04:00:00 EDT 2006 · Physical Review D

OSTI ID:925517

Arnesen, Christian M; Ligeti, Zoltan; Rothstein, Ira Z; Stewart, Iain W

We classify {Lambda}{sub QCD}/m{sub b} power corrections to nonleptonic B {yields} M{sub 1}M{sub 2} decays, where M{sub 1,2} are charmless non-isosinglet mesons. Using recent developments in soft-collinear effective theory, we prove that the leading contributions to annihilation amplitudes of order {alpha}{sub s}(m{sub b}) {Lambda}{sub QCD}/m{sub b} are real. The leading annihilation amplitudes depend on twist-2 and the twist-3 three parton distributions. A complex nonperturbative parameter from annihilation first appears at {Omega}[{alpha}{sub s}{sup 2}({radical}{Lambda}m{sub b}){Lambda}{sub QCD}/m{sub b}]. 'Chirally enhanced' contributions are also factorizable and real at lowest order. Thus, incalculable strong phases are suppressed in annihilation amplitudes, unless the {alpha}{sub s}({radical}{Lambda}m{sub b}) expansion breaks down. Modeling the distribution functions, we find that (11 {+-} 9)% and (15 {+-} 11)% of the absolute values of the measured {bar B}{sup 0} {yields} K{sup -}{pi}{sup +} and B{sup -} {yields} K{sup -}K{sup 0} penguin amplitudes come from annihilation. This is consistent with the expected size of power corrections.

• Research Organization: COLLABORATION - MIT
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 925517
• Report Number(s): LBNL--60196; BnR: KA1401020
• Journal Information: Physical Review D, Journal Name: Physical Review D Vol. 77
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANNIHILATION
DISTRIBUTION FUNCTIONS
MESONS
SIMULATION