O(αs2)andO(αs3)heavy flavor contributions to transversity atQ2≫m2
نویسندگان
چکیده
منابع مشابه
) Heavy Flavor Contributions
In deep-inelastic processes the heavy flavor Wilson coefficients factorize for Q2 ≫ m2 into the light flavor Wilson coefficients of the corresponding process and the massive operator matrix elements (OMEs). We calculate the O(αs) and O(α 3 s) massive OME for the flavor non-singlet transversity distribution. At O(αs) the OME is obtained for general values of the Mellin variable N , while at O(αs...
متن کاملTop - Charm flavor changing contributions to the effective bsZ vertex
We analyze the effects of a tree level flavor changing tcZ vertex induced by a mixing with new isosinglet Q = 2/3 quarks, on the effective bsZ vertex. We compute the contributions arising from the new electroweak penguin diagrams involving one insertion of the tcZ vertex. We show that a generalized GIM mechanism ensures the cancellation of the mass independent terms as well as of the new diverg...
متن کاملNew Heavy Flavor Contributions to the DIS Structure Function
We report on recent results obtained for the massive Wilson coefficients which contribute to the structure function F 2 (x, Q 2) at O(α 3 s) in the region Q 2 /m 2 > ∼ 10. In the calculation new species of harmonic sums and harmonic polylogarithms generated by cyclotomic polynomials arise in intermediary results which are briefly discussed.
متن کاملHeavy flavor contributions to the Drell-Yan cross section.
We investigate the effect of heavy flavor contributions to vector boson (V = γ, Z, W) production which is described by the Drell-Yan mechanism. All reactions with bottom and top quarks (Q i = b, t) in the final state, like q 1 + ¯ q 2 → V + Q 1 + ¯ Q 2 and g + g → V + Q 1 + ¯ Q 2 , are considered. This study also includes the virtual contributions containing heavy flavor loops which were not ta...
متن کاملContributions of Nonvolatile Phytochemicals to Nutrition and Flavor
Small fruit are rich in several types of phytochemicals, vitamins, and minerals. These compounds have health functional properties that may protect humans from cardiovascular disease and certain cancers. Several of these phytochemicals, such as dietary fiber, anthocyanins, and polyphenolics, also contribute to small fruit quality. Other components contribute to appearance and taste. Nonvolatile...
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: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.80.094010