This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevD.92.054032 in citations.
Please use the identifier: http://hdl.handle.net/2128/11121 in citations.
Origin of the structures observed in e + e − annihilation into multipion states around the p ¯ p threshold
Origin of the structures observed in e + e − annihilation into multipion states around the p ¯ p threshold
We analyze the origin of the structures observed in the reactions e+e−→3(π+π−), 2(π+π−π0), ωπ+π−π0, and e+e−→2(π+π−)π0 around the antiproton-proton (p¯p) threshold. We estimate the contribution of the two-step process e+e−→N¯N→ multipions to the total reaction amplitude. The amplitude for e+e−→N¯N i...
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Personal Name(s): | Haidenbauer, Johann (Corresponding author) |
---|---|
Hanhart, Christoph / Kang, Xian-Wei / Meißner, Ulf-G. | |
Contributing Institute: |
Institut 3 (Theoretische Kernphysik); IKP-3 Theorie der Starken Wechselwirkung; IAS-4 |
Published in: | Physical Review D Physical review / D, 92 92 (2015 2015) 5 5, S. 054032 054032 |
Imprint: |
[S.l.]
Soc.
2015
2015-09-24 2015-09-01 |
DOI: |
10.1103/PhysRevD.92.054032 |
Document Type: |
Journal Article |
Research Program: |
Condensed Matter and Molecular Building Blocks Computational Science and Mathematical Methods |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/11121 in citations.
We analyze the origin of the structures observed in the reactions e+e−→3(π+π−), 2(π+π−π0), ωπ+π−π0, and e+e−→2(π+π−)π0 around the antiproton-proton (p¯p) threshold. We estimate the contribution of the two-step process e+e−→N¯N→ multipions to the total reaction amplitude. The amplitude for e+e−→N¯N is constrained from near-threshold data on the e+e−→p¯p cross section and the one for N¯N→ multipions can be likewise fixed from available experimental information, for all studied 5π and 6π states. The resulting amplitude for e+e−→ multipions turns out to be large enough to play a role for the considered e+e− annihilation channels and, in three of the four reactions, even allows us to reproduce the data quantitatively near the N¯N threshold. The structures seen in the experiments emerge then as a threshold effect due to the opening of the N¯N channel. |