Finite volume dependence of the quark-antiquark vacuum expectation value
(2006) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 636(1). p.51-55- Abstract
- A general formula is derived for the finite volume dependence of vacuum expectation values analogous to Luscher's formula for the masses. The result involves no integrals over kinematic quantities and depends only on the matrix element between pions at zero momentum transfer thus presenting a new way to calculate the latter, i.e. pion sigma terms. The full order p(6) correction to the vacuum condensate <(q) over barq > is evaluated and compared with the result from the Luscher formula. Due to the size of the p(6) result no conclusion about the accuracy of the Luscher formula can be drawn.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/410288
- author
- Bijnens, Johan LU and Ghorbani, Karim LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 636
- issue
- 1
- pages
- 51 - 55
- publisher
- Elsevier
- external identifiers
-
- wos:000237201100009
- scopus:33645963155
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2006.03.024
- language
- English
- LU publication?
- yes
- id
- a637a084-e1d2-4486-9fb8-0635c39f3de3 (old id 410288)
- date added to LUP
- 2016-04-01 16:16:27
- date last changed
- 2024-01-26 01:55:45
@article{a637a084-e1d2-4486-9fb8-0635c39f3de3, abstract = {{A general formula is derived for the finite volume dependence of vacuum expectation values analogous to Luscher's formula for the masses. The result involves no integrals over kinematic quantities and depends only on the matrix element between pions at zero momentum transfer thus presenting a new way to calculate the latter, i.e. pion sigma terms. The full order p(6) correction to the vacuum condensate <(q) over barq > is evaluated and compared with the result from the Luscher formula. Due to the size of the p(6) result no conclusion about the accuracy of the Luscher formula can be drawn.}}, author = {{Bijnens, Johan and Ghorbani, Karim}}, issn = {{0370-2693}}, language = {{eng}}, number = {{1}}, pages = {{51--55}}, publisher = {{Elsevier}}, series = {{Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{Finite volume dependence of the quark-antiquark vacuum expectation value}}, url = {{http://dx.doi.org/10.1016/j.physletb.2006.03.024}}, doi = {{10.1016/j.physletb.2006.03.024}}, volume = {{636}}, year = {{2006}}, }