Finite volume dependence of the quarkantiquark vacuum expectation value
(2006) In Physics Letters. Section B: Nuclear, Elementary Particle and HighEnergy Physics 636(1). p.5155 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 HighEnergy Physics
 volume
 636
 issue
 1
 pages
 51  55
 publisher
 Elsevier
 external identifiers

 wos:000237201100009
 scopus:33645963155
 ISSN
 03702693
 DOI
 10.1016/j.physletb.2006.03.024
 language
 English
 LU publication?
 yes
 id
 a637a084e1d244869fb80635c39f3de3 (old id 410288)
 date added to LUP
 20160401 16:16:27
 date last changed
 20210518 02:58:41
@article{a637a084e1d244869fb80635c39f3de3, 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 = {03702693}, language = {eng}, number = {1}, pages = {5155}, publisher = {Elsevier}, series = {Physics Letters. Section B: Nuclear, Elementary Particle and HighEnergy Physics}, title = {Finite volume dependence of the quarkantiquark 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}, }