Bridging light-cone and NRQCD approaches: asymptotic behavior of B c electromagnetic form factor
نویسندگان
چکیده
منابع مشابه
Electromagnetic form-factor of the π meson with light-cone QCD sum rules
In this article, we calculate the electromagnetic form-factor of the π meson with the light-cone QCD sum rules. The numerical value fp(0) = 0.999±0.001 is in excellent agreement with the experimental data (extrapolated to the limit of zero momentum transfer). For large momentum transfers, the values from the two sum rules are all comparable with the experimental data and theoretical estimations...
متن کاملElectromagnetic Form Factor of the η meson in the Light Cone QCD
The electromagnetic form factor of the η meson is studied using the Light Cone QCD sum rules approach taking in to account higher twists contributions and SU(3) flavor symmetry breaking effects. e-mail: [email protected] e-mail: [email protected]
متن کاملFe b 20 03 Penguin induced B → η transition form factor in light cone QCD
We calculate the penguin form factor for the B → ηl+l− decay. This form factor is calculated in light cone QCD sum rules, including contributions from wave functions up to twist–4, as well as mass corrections of the light η meson. PACS numbers: 13.20.He, 13.20.–v, 14.40.–n e-mail: [email protected] e-mail: [email protected]
متن کاملLarge - Q 2 behavior of the pion electromagnetic form factor *
We study the largeQ 2 behavior of the electromagnetic form factor of the pion, which is viewed as a quarkantiquark bound state in a (nongauge) quantum field theory. When the pion's Bethe-Salpeter wave function is expanded in 0(4) partial waves, it is found that the information needed about the partial-wave amplitudes is their scaling behavior at large momentum and the locations of their poles i...
متن کاملThe B π form factor from light-cone sum rules in soft-collinear effective theory
Recently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory [1]. In these sum rules the short-distance scale refers to “hard-collinear” interactions with virtualities of order ΛQCDmb. Hard scales (related to virtualities of order mb) are integrated out and enter via external coefficien...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2011
ISSN: 1029-8479
DOI: 10.1007/jhep10(2011)105