ΔΔ excitation in proton-proton induced Π0Π0 production

T. Skorodko; M. Bashkanov; D. Bogoslawsky; H. Calén; H. Clement; E. Doroshkevich; L. Demiroers; C. Ekström; K. Fransson; L. Gustafsson; B. Höistad; G. Ivanov; M. Jacewicz; E. Jiganov; T. Johansson; O. Khakimova; S. Keleta; I. Koch; F. Kren; S. Kullander; A. Kupsc; P. Marciniewski; R. Meier; B. Morosov; C. Pauly; H. Petrén; Y. Petukhov; A. Povtorejko; R. J.M. Ruber; K. Schönning; W. Scobel; B. Shwartz; J. Stepaniak; P. Thörngren-Engblom; V. Tikhomirov; G. J. Wagner; M. Wolke; A. Yamamoto; J. Zabierowski; J. Zlomanczuk

doi:10.1016/j.physletb.2010.11.030

ΔΔ excitation in proton-proton induced Π⁰Π⁰ production

T. Skorodko, M. Bashkanov, D. Bogoslawsky, H. Calén, H. Clement^*, E. Doroshkevich, L. Demiroers, C. Ekström, K. Fransson, L. Gustafsson, B. Höistad, G. Ivanov, M. Jacewicz, E. Jiganov, T. Johansson, O. Khakimova, S. Keleta, I. Koch, F. Kren, S. KullanderA. Kupsc, P. Marciniewski, R. Meier, B. Morosov, C. Pauly, H. Petrén, Y. Petukhov, A. Povtorejko, R. J.M. Ruber, K. Schönning, W. Scobel, B. Shwartz, J. Stepaniak, P. Thörngren-Engblom, V. Tikhomirov, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowski, J. Zlomanczuk

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Exclusive measurements of the pp→ppΠ⁰Π⁰ reaction have been performed at CELSIUS/WASA at energies from threshold up to Tp=1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies Tp≥1 GeV, where the ΔΔ excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel ΔΔ excitation. This holds also for the double-pionic fusion to the quasibound ²He. The data are compared to model predictions, which are based on both Π- and ρ-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the ρ-exchange. A phenomenological modification allowing only a small ρ-exchange contribution leads to a quantitative description of the data.

Original language	English
Pages (from-to)	115-123
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	695
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physletb.2010.11.030
Publication status	Published - 10 Jan 2011

Keywords

ΔΔ excitation
Π-exchange
ρ-exchange
Two-pion production

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10.1016/j.physletb.2010.11.030

Cite this

Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calén, H., Clement, H., Doroshkevich, E., Demiroers, L., Ekström, C., Fransson, K., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kren, F., ... Zlomanczuk, J. (2011). ΔΔ excitation in proton-proton induced Π⁰Π⁰ production. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 695(1-4), 115-123. https://doi.org/10.1016/j.physletb.2010.11.030

@article{d19ce6cf3d5a42cc8831e57546a820e8,

title = "ΔΔ excitation in proton-proton induced Π0Π0 production",

abstract = "Exclusive measurements of the pp→ppΠ0Π0 reaction have been performed at CELSIUS/WASA at energies from threshold up to Tp=1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies Tp≥1 GeV, where the ΔΔ excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel ΔΔ excitation. This holds also for the double-pionic fusion to the quasibound 2He. The data are compared to model predictions, which are based on both Π- and ρ-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the ρ-exchange. A phenomenological modification allowing only a small ρ-exchange contribution leads to a quantitative description of the data.",

keywords = "ΔΔ excitation, Π-exchange, ρ-exchange, Two-pion production",

author = "T. Skorodko and M. Bashkanov and D. Bogoslawsky and H. Cal{\'e}n and H. Clement and E. Doroshkevich and L. Demiroers and C. Ekstr{\"o}m and K. Fransson and L. Gustafsson and B. H{\"o}istad and G. Ivanov and M. Jacewicz and E. Jiganov and T. Johansson and O. Khakimova and S. Keleta and I. Koch and F. Kren and S. Kullander and A. Kupsc and P. Marciniewski and R. Meier and B. Morosov and C. Pauly and H. Petr{\'e}n and Y. Petukhov and A. Povtorejko and Ruber, {R. J.M.} and K. Sch{\"o}nning and W. Scobel and B. Shwartz and J. Stepaniak and P. Th{\"o}rngren-Engblom and V. Tikhomirov and Wagner, {G. J.} and M. Wolke and A. Yamamoto and J. Zabierowski and J. Zlomanczuk",

year = "2011",

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doi = "10.1016/j.physletb.2010.11.030",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Skorodko, T, Bashkanov, M, Bogoslawsky, D, Calén, H, Clement, H, Doroshkevich, E, Demiroers, L, Ekström, C, Fransson, K, Gustafsson, L, Höistad, B, Ivanov, G, Jacewicz, M, Jiganov, E, Johansson, T, Khakimova, O, Keleta, S, Koch, I, Kren, F, Kullander, S, Kupsc, A, Marciniewski, P, Meier, R, Morosov, B, Pauly, C, Petrén, H, Petukhov, Y, Povtorejko, A, Ruber, RJM, Schönning, K, Scobel, W, Shwartz, B, Stepaniak, J, Thörngren-Engblom, P, Tikhomirov, V, Wagner, GJ, Wolke, M, Yamamoto, A, Zabierowski, J & Zlomanczuk, J 2011, 'ΔΔ excitation in proton-proton induced Π⁰Π⁰ production', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 695, no. 1-4, pp. 115-123. https://doi.org/10.1016/j.physletb.2010.11.030

TY - JOUR

T1 - ΔΔ excitation in proton-proton induced Π0Π0 production

AU - Skorodko, T.

AU - Bashkanov, M.

AU - Bogoslawsky, D.

AU - Calén, H.

AU - Clement, H.

AU - Doroshkevich, E.

AU - Demiroers, L.

AU - Ekström, C.

AU - Fransson, K.

AU - Gustafsson, L.

AU - Höistad, B.

AU - Ivanov, G.

AU - Jacewicz, M.

AU - Jiganov, E.

AU - Johansson, T.

AU - Khakimova, O.

AU - Keleta, S.

AU - Koch, I.

AU - Kren, F.

AU - Kullander, S.

AU - Kupsc, A.

AU - Marciniewski, P.

AU - Meier, R.

AU - Morosov, B.

AU - Pauly, C.

AU - Petrén, H.

AU - Petukhov, Y.

AU - Povtorejko, A.

AU - Ruber, R. J.M.

AU - Schönning, K.

AU - Scobel, W.

AU - Shwartz, B.

AU - Stepaniak, J.

AU - Thörngren-Engblom, P.

AU - Tikhomirov, V.

AU - Wagner, G. J.

AU - Wolke, M.

AU - Yamamoto, A.

AU - Zabierowski, J.

AU - Zlomanczuk, J.

PY - 2011/1/10

Y1 - 2011/1/10

N2 - Exclusive measurements of the pp→ppΠ0Π0 reaction have been performed at CELSIUS/WASA at energies from threshold up to Tp=1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies Tp≥1 GeV, where the ΔΔ excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel ΔΔ excitation. This holds also for the double-pionic fusion to the quasibound 2He. The data are compared to model predictions, which are based on both Π- and ρ-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the ρ-exchange. A phenomenological modification allowing only a small ρ-exchange contribution leads to a quantitative description of the data.

AB - Exclusive measurements of the pp→ppΠ0Π0 reaction have been performed at CELSIUS/WASA at energies from threshold up to Tp=1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies Tp≥1 GeV, where the ΔΔ excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel ΔΔ excitation. This holds also for the double-pionic fusion to the quasibound 2He. The data are compared to model predictions, which are based on both Π- and ρ-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the ρ-exchange. A phenomenological modification allowing only a small ρ-exchange contribution leads to a quantitative description of the data.

KW - ΔΔ excitation

KW - Π-exchange

KW - ρ-exchange

KW - Two-pion production

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U2 - 10.1016/j.physletb.2010.11.030

DO - 10.1016/j.physletb.2010.11.030

M3 - Article

AN - SCOPUS:78650309413

SN - 0370-2693

VL - 695

SP - 115

EP - 123

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-4

ER -