The pp → ppπ0π0 reaction and its limiting case, fusion to quasi-bound 2He, in search of the ABC effect

T. Skorodko; M. Bashkanov; D. Bogoslowsky; H. Calén; H. Clement; E. Doroshkevich; C. Ekström; K. Fransson; L. Gustafsson; B. Höistad; G. Ivanov; M. Jacewicz; E. Jiganov; T. Johansson; S. Keleta; O. Khakimova; I. Koch; F. Kren; S. Kullander; A. Kupść; A. Kuznetsov; P. Marciniewski; R. Meier; B. Morosov; C. Pauly; H. Petterson; Y. Petukhov; A. Povtorejko; A. Pricking; R. J.M.Y. Ruber; K. Schönning; W. Scobel; B. Shwartz; V. Sopov; J. Stepaniak; P. Thörngren-Engblom; V. Tikhomirov; A. Turwiecki; G. J. Wagner; M. Wolke; A. Yamamoto; J. Zabierowskf; J. Złomanćzuk

doi:10.1142/S0217751X1105258X

The pp → ppπ⁰π⁰ reaction and its limiting case, fusion to quasi-bound ²He, in search of the ABC effect

T. Skorodko^*, M. Bashkanov, D. Bogoslowsky, H. Calén, H. Clement, E. Doroshkevich, C. Ekström, K. Fransson, L. Gustafsson, B. Höistad, G. Ivanov, M. Jacewicz, E. Jiganov, T. Johansson, S. Keleta, O. Khakimova, I. Koch, F. Kren, S. Kullander, A. KupśćA. Kuznetsov, P. Marciniewski, R. Meier, B. Morosov, C. Pauly, H. Petterson, Y. Petukhov, A. Povtorejko, A. Pricking, R. J.M.Y. Ruber, K. Schönning, W. Scobel, B. Shwartz, V. Sopov, J. Stepaniak, P. Thörngren-Engblom, V. Tikhomirov, A. Turwiecki, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowskf, J. Złomanćzuk

^*Corresponding author for this work

Physics

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

Abstract

The π⁰π⁰ production in pp-collisions has been investigated in exclusive and kinematically complete measurements from threshold up to T_p = 1.4 GeV. For incident energies T_p > 1 GeV, i.e. in the region beyond the Roper excitation, the ΔΔ excitation process takes over. The data are well explained by the t-channel ΔΔ process dominated by pion exchange. There is no low-mass enhancement (ABC effect) in the π⁰π⁰-invariant mass distribution beyond that given by the conventional t-channel ΔΔ process. This is also true for the limiting case, where the protons are in the quasi-bound ²He state.

Original language	English
Pages (from-to)	702-704
Number of pages	3
Journal	International Journal of Modern Physics A
Volume	26
Issue number	3-4
DOIs	https://doi.org/10.1142/S0217751X1105258X
Publication status	Published - 10 Feb 2011

Keywords

ΔΔ excitation
ABC effect
quasibound He
t-channel ΔΔ process

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10.1142/S0217751X1105258X

Cite this

Skorodko, T., Bashkanov, M., Bogoslowsky, D., Calén, H., Clement, H., Doroshkevich, E., Ekström, C., Fransson, K., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Koch, I., Kren, F., Kullander, S., ... Złomanćzuk, J. (2011). The pp → ppπ⁰π⁰ reaction and its limiting case, fusion to quasi-bound ²He, in search of the ABC effect. International Journal of Modern Physics A, 26(3-4), 702-704. https://doi.org/10.1142/S0217751X1105258X

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title = "The pp → ppπ0π0 reaction and its limiting case, fusion to quasi-bound 2He, in search of the ABC effect",

abstract = "The π0π0 production in pp-collisions has been investigated in exclusive and kinematically complete measurements from threshold up to Tp = 1.4 GeV. For incident energies Tp > 1 GeV, i.e. in the region beyond the Roper excitation, the ΔΔ excitation process takes over. The data are well explained by the t-channel ΔΔ process dominated by pion exchange. There is no low-mass enhancement (ABC effect) in the π0π0-invariant mass distribution beyond that given by the conventional t-channel ΔΔ process. This is also true for the limiting case, where the protons are in the quasi-bound 2He state.",

keywords = "ΔΔ excitation, ABC effect, quasibound He, t-channel ΔΔ process",

author = "T. Skorodko and M. Bashkanov and D. Bogoslowsky and H. Cal{\'e}n and H. Clement and E. Doroshkevich 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 S. Keleta and O. Khakimova and I. Koch and F. Kren and S. Kullander and A. Kup{\'s}{\'c} and A. Kuznetsov and P. Marciniewski and R. Meier and B. Morosov and C. Pauly and H. Petterson and Y. Petukhov and A. Povtorejko and A. Pricking and Ruber, {R. J.M.Y.} and K. Sch{\"o}nning and W. Scobel and B. Shwartz and V. Sopov and J. Stepaniak and P. Th{\"o}rngren-Engblom and V. Tikhomirov and A. Turwiecki and Wagner, {G. J.} and M. Wolke and A. Yamamoto and J. Zabierowskf and J. Z{\l}oman{\'c}zuk",

year = "2011",

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day = "10",

doi = "10.1142/S0217751X1105258X",

language = "English",

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pages = "702--704",

journal = "International Journal of Modern Physics A",

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Skorodko, T, Bashkanov, M, Bogoslowsky, D, Calén, H, Clement, H, Doroshkevich, E, Ekström, C, Fransson, K, Gustafsson, L, Höistad, B, Ivanov, G, Jacewicz, M, Jiganov, E, Johansson, T, Keleta, S, Khakimova, O, Koch, I, Kren, F, Kullander, S, Kupść, A, Kuznetsov, A, Marciniewski, P, Meier, R, Morosov, B, Pauly, C, Petterson, H, Petukhov, Y, Povtorejko, A, Pricking, A, Ruber, RJMY, Schönning, K, Scobel, W, Shwartz, B, Sopov, V, Stepaniak, J, Thörngren-Engblom, P, Tikhomirov, V, Turwiecki, A, Wagner, GJ, Wolke, M, Yamamoto, A, Zabierowskf, J & Złomanćzuk, J 2011, 'The pp → ppπ⁰π⁰ reaction and its limiting case, fusion to quasi-bound ²He, in search of the ABC effect', International Journal of Modern Physics A, vol. 26, no. 3-4, pp. 702-704. https://doi.org/10.1142/S0217751X1105258X

TY - JOUR

T1 - The pp → ppπ0π0 reaction and its limiting case, fusion to quasi-bound 2He, in search of the ABC effect

AU - Skorodko, T.

AU - Bashkanov, M.

AU - Bogoslowsky, D.

AU - Calén, H.

AU - Clement, H.

AU - Doroshkevich, E.

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 - Keleta, S.

AU - Khakimova, O.

AU - Koch, I.

AU - Kren, F.

AU - Kullander, S.

AU - Kupść, A.

AU - Kuznetsov, A.

AU - Marciniewski, P.

AU - Meier, R.

AU - Morosov, B.

AU - Pauly, C.

AU - Petterson, H.

AU - Petukhov, Y.

AU - Povtorejko, A.

AU - Pricking, A.

AU - Ruber, R. J.M.Y.

AU - Schönning, K.

AU - Scobel, W.

AU - Shwartz, B.

AU - Sopov, V.

AU - Stepaniak, J.

AU - Thörngren-Engblom, P.

AU - Tikhomirov, V.

AU - Turwiecki, A.

AU - Wagner, G. J.

AU - Wolke, M.

AU - Yamamoto, A.

AU - Zabierowskf, J.

AU - Złomanćzuk, J.

PY - 2011/2/10

Y1 - 2011/2/10

N2 - The π0π0 production in pp-collisions has been investigated in exclusive and kinematically complete measurements from threshold up to Tp = 1.4 GeV. For incident energies Tp > 1 GeV, i.e. in the region beyond the Roper excitation, the ΔΔ excitation process takes over. The data are well explained by the t-channel ΔΔ process dominated by pion exchange. There is no low-mass enhancement (ABC effect) in the π0π0-invariant mass distribution beyond that given by the conventional t-channel ΔΔ process. This is also true for the limiting case, where the protons are in the quasi-bound 2He state.

AB - The π0π0 production in pp-collisions has been investigated in exclusive and kinematically complete measurements from threshold up to Tp = 1.4 GeV. For incident energies Tp > 1 GeV, i.e. in the region beyond the Roper excitation, the ΔΔ excitation process takes over. The data are well explained by the t-channel ΔΔ process dominated by pion exchange. There is no low-mass enhancement (ABC effect) in the π0π0-invariant mass distribution beyond that given by the conventional t-channel ΔΔ process. This is also true for the limiting case, where the protons are in the quasi-bound 2He state.

KW - ΔΔ excitation

KW - ABC effect

KW - quasibound He

KW - t-channel ΔΔ process

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U2 - 10.1142/S0217751X1105258X

DO - 10.1142/S0217751X1105258X

M3 - Article

AN - SCOPUS:79952031538

SN - 0217-751X

VL - 26

SP - 702

EP - 704

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

IS - 3-4

ER -