| | |
| | |
Stat |
Members: 3645 Articles: 2'501'711 Articles rated: 2609
20 April 2024 |
|
| | | |
|
Article overview
| |
|
Resummed pole mass, static potential, and Upsilon(1S) spectrum | C. S. Kim
; Taekoon Lee
; Guo-Li Wang
; | Date: |
21 Jun 2004 | Subject: | hep-ph | Abstract: | Employing the heavy quark pole mass and static potential that were obtained from resummation of the renormalon-caused large order behavior to all orders, and matching the resummed static potential to the long distance Cornell potential we obtain a new estimate of the bottom quark mass % $m_b^{ar{ ext % MS}}=4.20$ GeV at $alpha_s(M_z)=0.118$ from $Upsilon$(1S) system. We point out that the pure perturbative QCD approach to $Upsilon$(1S) spectrum should have a sizable systematic error of about 100 MeV, due to the absence of the long distance confining potential, and that the incorporation of the latter is essential for accurate determination of the ground state energy. We also recalculate the nonperturbative Leutwyler-Voloshin effect using a resummed octet potential matched to a confining linear potential, and obtain a result that is substantially smaller than the estimates based on Coulombic potentials. The hyperfine splitting is estimated to be $50 pm 8$ MeV at $alpha_s(M_z)=0.118$. | Source: | arXiv, hep-ph/0406217 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |