This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/10436 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2009.05.052 in citations.
Quark mass dependence of the pion vector form factor
Quark mass dependence of the pion vector form factor
We examine the quark mass dependence of the pion vector form factor, particularly the curvature (mean quartic radius). We focus our study on the consequences of assuming that the coupling constant of the rho to pions, g(rho pi pi), is largely independent of the quark mass while the quark mass depend...
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Personal Name(s): | Guo, F.-K. |
---|---|
Hanhart, C. / Llanes-Estrada, F.J. / Meissner, U.G. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 |
Published in: | Physics letters / B, 678 (2009) |
Imprint: |
Amsterdam
North-Holland Publ.
2009
|
DOI: |
10.1016/j.physletb.2009.05.052 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physics Letters B
678 |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2009.05.052 in citations.
We examine the quark mass dependence of the pion vector form factor, particularly the curvature (mean quartic radius). We focus our study on the consequences of assuming that the coupling constant of the rho to pions, g(rho pi pi), is largely independent of the quark mass while the quark mass dependence of the rho mass is given by recent lattice data. By employing the Omnes representation we can provide a very clean estimate for a certain combination of the curvature and the square radius, whose quark mass dependence could be determined from lattice computations. This study provides an independent access to the quark mass dependence of the rho pi pi coupling and in this way a non-trivial check of the systematics of chiral extrapolations. We also provide an improved value for the curvature for physical values for the quark masses. namely (r(4)) = 0.73 +/- 0.09 fm(4) or equivalently c(v) = 4.00 +/- 0.50 GeV-4. (C) 2009 Elsevier B.V. All rights reserved. |