A partial wave analysis of the reaction γγ → π+π-π0

H. Albrecht; T. Hamacher; R. P. Hofmann; T. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Reßing; H. Schröder; H. D. Schulz; M. Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; A. Lange; A. Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; K. R. Schubert; R. Schwierz; B. Spaan; R. Waldi; K. Reim; H. Wegener; R. Eckmann; H. Kuipers; O. Mai; R. Mundt; T. Oest; R. Reiner; W. Schmidt-Parzefall; J. Stiewe; S. Werner; K. Ehret; W. Hofmann; A. Hüpper; K. T. Knöpfle; J. Spengler; P. Krieger; D. B. MacFarlane; J. D. Prentice; P. R.B. Saull; K. Tzamariudaki; R. G. Van De Water; T. S. Yoon; M. Schneider; S. Weseler; M. Bračko; G. Kernel; P. Križan; E. Križnič; G. Medin; T. Podobnik; T. Živko; V. Balagura; S. Barsuk; I. Belyaev; R. Chistov; M. Danilov; V. Eiges; L. Gershtein; Yu Gershtein; A. Golutvin; O. Igonkina; I. Korolko; G. Kostina; D. Litvintsev; P. Pakhlov; S. Semenov; A. Snizhko; I. Tichomirov; Yu Zaitsev

doi:10.1007/s002880050409

A partial wave analysis of the reaction γγ → π⁺π^-π⁰

H. Albrecht, T. Hamacher, R. P. Hofmann, T. Kirchhoff, R. Mankel, A. Nau, S. Nowak, D. Reßing, H. Schröder, H. D. Schulz, M. Walter, R. Wurth, C. Hast, H. Kapitza, H. Kolanoski, A. Kosche, A. Lange, A. Lindner, M. Schieber, T. SiegmundH. Thurn, D. Töpfer, D. Wegener, C. Frankl, J. Graf, M. Schmidtler, M. Schramm, K. R. Schubert, R. Schwierz, B. Spaan, R. Waldi, K. Reim, H. Wegener, R. Eckmann, H. Kuipers, O. Mai, R. Mundt, T. Oest, R. Reiner, W. Schmidt-Parzefall, J. Stiewe, S. Werner, K. Ehret, W. Hofmann, A. Hüpper, K. T. Knöpfle, J. Spengler, P. Krieger, D. B. MacFarlane, J. D. Prentice, P. R.B. Saull, K. Tzamariudaki, R. G. Van De Water, T. S. Yoon, M. Schneider, S. Weseler, M. Bračko, G. Kernel, P. Križan, E. Križnič, G. Medin, T. Podobnik, T. Živko, V. Balagura, S. Barsuk, I. Belyaev, R. Chistov, M. Danilov, V. Eiges, L. Gershtein, Yu Gershtein, A. Golutvin, O. Igonkina, I. Korolko, G. Kostina, D. Litvintsev, P. Pakhlov, S. Semenov, A. Snizhko, I. Tichomirov, Yu Zaitsev

School of Arts and Sciences, Physics & Astronomy

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17 Scopus citations

Abstract

The two-photon reaction γγ → π⁺π^-π⁰ was investigated by the ARGUS collaboration. The reaction is dominated by the formation of the a₂(1320) meson. A value of Γ_γγ = (0.96 ± 0.03 ± 0.13) keV was obtained for its radiative width, in good agreement with the world average. The fraction of γγ-helicity 0 in the a₂ two-photon width was found to be equal to (6.7 ± 2.2)%. It allows a discrimination among models that describe the dynamics in the two-photon production of tensor mesons. An upper limit of Γ_γγ·Br(ρ^±π ^∓) < 0.54 keV (90% c.l.) was obtained for the resonance π(1300). The partial wave analysis revealed almost a complete absence of the wave with spin and parity J^P = 2^-. We also observe no significant enhancement in the π⁺π^-π⁰ invariant mass spectrum that could be attributed to the two-photon production of the π₂(1670). The obtained upper limit Γ_γγ(π₂(1670)) < 0.19 keV at the 90% confidence level is in contradiction with two previous observations.

Original language	English (US)
Pages (from-to)	469-477
Number of pages	9
Journal	Zeitschrift fur Physik C-Particles and Fields
Volume	74
Issue number	3
DOIs	https://doi.org/10.1007/s002880050409
State	Published - 1997

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1007/s002880050409

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Albrecht, H., Hamacher, T., Hofmann, R. P., Kirchhoff, T., Mankel, R., Nau, A., Nowak, S., Reßing, D., Schröder, H., Schulz, H. D., Walter, M., Wurth, R., Hast, C., Kapitza, H., Kolanoski, H., Kosche, A., Lange, A., Lindner, A., Schieber, M., ... Zaitsev, Y. (1997). A partial wave analysis of the reaction γγ → π⁺π^-π⁰. Zeitschrift fur Physik C-Particles and Fields, 74(3), 469-477. https://doi.org/10.1007/s002880050409

@article{32a3f9388c04449abca8f08a9ce49a9b,

title = "A partial wave analysis of the reaction γγ → π+π-π0",

abstract = "The two-photon reaction γγ → π+π-π0 was investigated by the ARGUS collaboration. The reaction is dominated by the formation of the a2(1320) meson. A value of Γγγ = (0.96 ± 0.03 ± 0.13) keV was obtained for its radiative width, in good agreement with the world average. The fraction of γγ-helicity 0 in the a2 two-photon width was found to be equal to (6.7 ± 2.2)%. It allows a discrimination among models that describe the dynamics in the two-photon production of tensor mesons. An upper limit of Γγγ·Br(ρ±π ∓) < 0.54 keV (90% c.l.) was obtained for the resonance π(1300). The partial wave analysis revealed almost a complete absence of the wave with spin and parity JP = 2-. We also observe no significant enhancement in the π+π-π0 invariant mass spectrum that could be attributed to the two-photon production of the π2(1670). The obtained upper limit Γγγ(π2(1670)) < 0.19 keV at the 90% confidence level is in contradiction with two previous observations.",

author = "H. Albrecht and T. Hamacher and Hofmann, {R. P.} and T. Kirchhoff and R. Mankel and A. Nau and S. Nowak and D. Re{\ss}ing and H. Schr{\"o}der and Schulz, {H. D.} and M. Walter and R. Wurth and C. Hast and H. Kapitza and H. Kolanoski and A. Kosche and A. Lange and A. Lindner and M. Schieber and T. Siegmund and H. Thurn and D. T{\"o}pfer and D. Wegener and C. Frankl and J. Graf and M. Schmidtler and M. Schramm and Schubert, {K. R.} and R. Schwierz and B. Spaan and R. Waldi and K. Reim and H. Wegener and R. Eckmann and H. Kuipers and O. Mai and R. Mundt and T. Oest and R. Reiner and W. Schmidt-Parzefall and J. Stiewe and S. Werner and K. Ehret and W. Hofmann and A. H{\"u}pper and Kn{\"o}pfle, {K. T.} and J. Spengler and P. Krieger and MacFarlane, {D. B.} and Prentice, {J. D.} and Saull, {P. R.B.} and K. Tzamariudaki and {Van De Water}, {R. G.} and Yoon, {T. S.} and M. Schneider and S. Weseler and M. Bra{\v c}ko and G. Kernel and P. Kri{\v z}an and E. Kri{\v z}ni{\v c} and G. Medin and T. Podobnik and T. {\v Z}ivko and V. Balagura and S. Barsuk and I. Belyaev and R. Chistov and M. Danilov and V. Eiges and L. Gershtein and Yu Gershtein and A. Golutvin and O. Igonkina and I. Korolko and G. Kostina and D. Litvintsev and P. Pakhlov and S. Semenov and A. Snizhko and I. Tichomirov and Yu Zaitsev",

year = "1997",

doi = "10.1007/s002880050409",

language = "English (US)",

volume = "74",

pages = "469--477",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "3",

}

Albrecht, H, Hamacher, T, Hofmann, RP, Kirchhoff, T, Mankel, R, Nau, A, Nowak, S, Reßing, D, Schröder, H, Schulz, HD, Walter, M, Wurth, R, Hast, C, Kapitza, H, Kolanoski, H, Kosche, A, Lange, A, Lindner, A, Schieber, M, Siegmund, T, Thurn, H, Töpfer, D, Wegener, D, Frankl, C, Graf, J, Schmidtler, M, Schramm, M, Schubert, KR, Schwierz, R, Spaan, B, Waldi, R, Reim, K, Wegener, H, Eckmann, R, Kuipers, H, Mai, O, Mundt, R, Oest, T, Reiner, R, Schmidt-Parzefall, W, Stiewe, J, Werner, S, Ehret, K, Hofmann, W, Hüpper, A, Knöpfle, KT, Spengler, J, Krieger, P, MacFarlane, DB, Prentice, JD, Saull, PRB, Tzamariudaki, K, Van De Water, RG, Yoon, TS, Schneider, M, Weseler, S, Bračko, M, Kernel, G, Križan, P, Križnič, E, Medin, G, Podobnik, T, Živko, T, Balagura, V, Barsuk, S, Belyaev, I, Chistov, R, Danilov, M, Eiges, V, Gershtein, L, Gershtein, Y, Golutvin, A, Igonkina, O, Korolko, I, Kostina, G, Litvintsev, D, Pakhlov, P, Semenov, S, Snizhko, A, Tichomirov, I & Zaitsev, Y 1997, 'A partial wave analysis of the reaction γγ → π⁺π^-π⁰', Zeitschrift fur Physik C-Particles and Fields, vol. 74, no. 3, pp. 469-477. https://doi.org/10.1007/s002880050409

TY - JOUR

T1 - A partial wave analysis of the reaction γγ → π+π-π0

AU - Albrecht, H.

AU - Hamacher, T.

AU - Hofmann, R. P.

AU - Kirchhoff, T.

AU - Mankel, R.

AU - Nau, A.

AU - Nowak, S.

AU - Reßing, D.

AU - Schröder, H.

AU - Schulz, H. D.

AU - Walter, M.

AU - Wurth, R.

AU - Hast, C.

AU - Kapitza, H.

AU - Kolanoski, H.

AU - Kosche, A.

AU - Lange, A.

AU - Lindner, A.

AU - Schieber, M.

AU - Siegmund, T.

AU - Thurn, H.

AU - Töpfer, D.

AU - Wegener, D.

AU - Frankl, C.

AU - Graf, J.

AU - Schmidtler, M.

AU - Schramm, M.

AU - Schubert, K. R.

AU - Schwierz, R.

AU - Spaan, B.

AU - Waldi, R.

AU - Reim, K.

AU - Wegener, H.

AU - Eckmann, R.

AU - Kuipers, H.

AU - Mai, O.

AU - Mundt, R.

AU - Oest, T.

AU - Reiner, R.

AU - Schmidt-Parzefall, W.

AU - Stiewe, J.

AU - Werner, S.

AU - Ehret, K.

AU - Hofmann, W.

AU - Hüpper, A.

AU - Knöpfle, K. T.

AU - Spengler, J.

AU - Krieger, P.

AU - MacFarlane, D. B.

AU - Prentice, J. D.

AU - Saull, P. R.B.

AU - Tzamariudaki, K.

AU - Van De Water, R. G.

AU - Yoon, T. S.

AU - Schneider, M.

AU - Weseler, S.

AU - Bračko, M.

AU - Kernel, G.

AU - Križan, P.

AU - Križnič, E.

AU - Medin, G.

AU - Podobnik, T.

AU - Živko, T.

AU - Balagura, V.

AU - Barsuk, S.

AU - Belyaev, I.

AU - Chistov, R.

AU - Danilov, M.

AU - Eiges, V.

AU - Gershtein, L.

AU - Gershtein, Yu

AU - Golutvin, A.

AU - Igonkina, O.

AU - Korolko, I.

AU - Kostina, G.

AU - Litvintsev, D.

AU - Pakhlov, P.

AU - Semenov, S.

AU - Snizhko, A.

AU - Tichomirov, I.

AU - Zaitsev, Yu

PY - 1997

Y1 - 1997

N2 - The two-photon reaction γγ → π+π-π0 was investigated by the ARGUS collaboration. The reaction is dominated by the formation of the a2(1320) meson. A value of Γγγ = (0.96 ± 0.03 ± 0.13) keV was obtained for its radiative width, in good agreement with the world average. The fraction of γγ-helicity 0 in the a2 two-photon width was found to be equal to (6.7 ± 2.2)%. It allows a discrimination among models that describe the dynamics in the two-photon production of tensor mesons. An upper limit of Γγγ·Br(ρ±π ∓) < 0.54 keV (90% c.l.) was obtained for the resonance π(1300). The partial wave analysis revealed almost a complete absence of the wave with spin and parity JP = 2-. We also observe no significant enhancement in the π+π-π0 invariant mass spectrum that could be attributed to the two-photon production of the π2(1670). The obtained upper limit Γγγ(π2(1670)) < 0.19 keV at the 90% confidence level is in contradiction with two previous observations.

AB - The two-photon reaction γγ → π+π-π0 was investigated by the ARGUS collaboration. The reaction is dominated by the formation of the a2(1320) meson. A value of Γγγ = (0.96 ± 0.03 ± 0.13) keV was obtained for its radiative width, in good agreement with the world average. The fraction of γγ-helicity 0 in the a2 two-photon width was found to be equal to (6.7 ± 2.2)%. It allows a discrimination among models that describe the dynamics in the two-photon production of tensor mesons. An upper limit of Γγγ·Br(ρ±π ∓) < 0.54 keV (90% c.l.) was obtained for the resonance π(1300). The partial wave analysis revealed almost a complete absence of the wave with spin and parity JP = 2-. We also observe no significant enhancement in the π+π-π0 invariant mass spectrum that could be attributed to the two-photon production of the π2(1670). The obtained upper limit Γγγ(π2(1670)) < 0.19 keV at the 90% confidence level is in contradiction with two previous observations.

UR - http://www.scopus.com/inward/record.url?scp=0038600478&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038600478&partnerID=8YFLogxK

U2 - 10.1007/s002880050409

DO - 10.1007/s002880050409

M3 - Article

AN - SCOPUS:0038600478

SN - 1434-6044

VL - 74

SP - 469

EP - 477

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

A partial wave analysis of the reaction γγ → π⁺π^-π⁰

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