Two-loop QCD corrections to the heavy quark form factors: Anomaly contributions
Nuclear Physics B, ISSN: 0550-3213, Vol: 723, Issue: 1, Page: 91-116
2005
- 80Citations
- 2Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
We present closed analytic expressions for the order αs2 triangle diagram contributions to the matrix elements of the singlet and non-singlet axial vector currents between the vacuum and a quark–antiquark state. We have calculated these vertex functions for arbitrary momentum transfer and for four different sets of internal and external quark masses. We show that both the singlet and non-singlet vertex functions satisfy the correct chiral Ward identities. Using the exact expressions for the finite axial vector form factors, we check the quality and the convergence of expansions at production threshold and for asymptotic energies.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0550321305005158; http://dx.doi.org/10.1016/j.nuclphysb.2005.06.025; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=23444449260&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0550321305005158; https://dx.doi.org/10.1016/j.nuclphysb.2005.06.025
Elsevier BV
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