Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance

H. Clement; M. Bashkanov; C. Bargholtz; D. Bogoslawsky; H. Calen; F. Cappellaro; L. Demiroers; E. Doroshkevich; D. Duniec; C. Ekström; K. Franssen; L. Geren; L. Gustafsson; B. Höistad; G. Ivanov; M. Jacewicz; E. Jiganov; T. Johansson; M. Kaskulov; O. Khakimova; S. Keleta; I. Koch; F. Kren; S. Kullander; A. Kupść; A. Kuznetsov; K. Lindberg; P. Marciniewski; R. Meier; B. Morosov; C. Pauly; H. Petterson; Y. Petukhov; A. Povtorejko; A. Pricking; K. Schönning; W. Scobel; B. Shwartz; T. Skorodko; V. Sopov; J. Stepeniak; P. E. Tegner; P. Thörngren-Engblom; V. Tikhomirov; G. J. Wagner; M. Wolke; A. Yamamoto; J. Zabierowski; I. Zartova; J. Złomanczuk

doi:10.1016/j.ppnp.2007.12.032

Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance

H. Clement^*, M. Bashkanov, C. Bargholtz, D. Bogoslawsky, H. Calen, F. Cappellaro, L. Demiroers, E. Doroshkevich, D. Duniec, C. Ekström, K. Franssen, L. Geren, L. Gustafsson, B. Höistad, G. Ivanov, M. Jacewicz, E. Jiganov, T. Johansson, M. Kaskulov, O. KhakimovaS. Keleta, I. Koch, F. Kren, S. Kullander, A. Kupść, A. Kuznetsov, K. Lindberg, P. Marciniewski, R. Meier, B. Morosov, C. Pauly, H. Petterson, Y. Petukhov, A. Povtorejko, A. Pricking, K. Schönning, W. Scobel, B. Shwartz, T. Skorodko, V. Sopov, J. Stepeniak, P. E. Tegner, P. Thörngren-Engblom, V. Tikhomirov, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowski, I. Zartova, J. Złomanczuk

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Short survey › peer-review

Abstract

The ABC effect-an intriguing low-mass enhancement in the π π invariant mass spectrum-is known from inclusive measurements of two-pion production in nuclear fusion reactions. First exclusive measurements carried out at CELSIUS-WASA for the fusion reactions leading to d or ³He reveal this effect to be a σ-channel phenomenon associated with the formation of a Δ Δ system in the intermediate state and combined with a resonance-like behavior in the total cross-section. Together with the observation that the differential distributions do not change in shape over the resonance region the features fulfill the criteria of an isoscalar s-channel resonance in p n and N N π π systems, if the two emitted nucleons are bound. It obviously is robust enough to survive in nuclei as a dibaryonic resonance configuration. In this context also the phenomenon of N Δ resonances is reexamined.

Original language	English
Pages (from-to)	276-282
Number of pages	7
Journal	Progress in Particle and Nuclear Physics
Volume	61
Issue number	1
DOIs	https://doi.org/10.1016/j.ppnp.2007.12.032
Publication status	Published - 1 Jul 2008

Keywords

π π low-mass enhancement
σ channel
ABC effect
Dibaryonic resonance

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10.1016/j.ppnp.2007.12.032

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Clement, H., Bashkanov, M., Bargholtz, C., Bogoslawsky, D., Calen, H., Cappellaro, F., Demiroers, L., Doroshkevich, E., Duniec, D., Ekström, C., Franssen, K., Geren, L., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Kaskulov, M., ... Złomanczuk, J. (2008). Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance. Progress in Particle and Nuclear Physics, 61(1), 276-282. https://doi.org/10.1016/j.ppnp.2007.12.032

@article{21bfb4da4b7e4a2aa2ae1a256a4fabac,

title = "Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance",

abstract = "The ABC effect-an intriguing low-mass enhancement in the π π invariant mass spectrum-is known from inclusive measurements of two-pion production in nuclear fusion reactions. First exclusive measurements carried out at CELSIUS-WASA for the fusion reactions leading to d or 3He reveal this effect to be a σ-channel phenomenon associated with the formation of a Δ Δ system in the intermediate state and combined with a resonance-like behavior in the total cross-section. Together with the observation that the differential distributions do not change in shape over the resonance region the features fulfill the criteria of an isoscalar s-channel resonance in p n and N N π π systems, if the two emitted nucleons are bound. It obviously is robust enough to survive in nuclei as a dibaryonic resonance configuration. In this context also the phenomenon of N Δ resonances is reexamined.",

keywords = "π π low-mass enhancement, σ channel, ABC effect, Dibaryonic resonance",

author = "H. Clement and M. Bashkanov and C. Bargholtz and D. Bogoslawsky and H. Calen and F. Cappellaro and L. Demiroers and E. Doroshkevich and D. Duniec and C. Ekstr{\"o}m and K. Franssen and L. Geren and L. Gustafsson and B. H{\"o}istad and G. Ivanov and M. Jacewicz and E. Jiganov and T. Johansson and M. Kaskulov and O. Khakimova and S. Keleta and I. Koch and F. Kren and S. Kullander and A. Kup{\'s}{\'c} and A. Kuznetsov and K. Lindberg 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 K. Sch{\"o}nning and W. Scobel and B. Shwartz and T. Skorodko and V. Sopov and J. Stepeniak and Tegner, {P. E.} and P. Th{\"o}rngren-Engblom and V. Tikhomirov and Wagner, {G. J.} and M. Wolke and A. Yamamoto and J. Zabierowski and I. Zartova and J. Z{\l}omanczuk",

year = "2008",

month = jul,

day = "1",

doi = "10.1016/j.ppnp.2007.12.032",

language = "English",

volume = "61",

pages = "276--282",

journal = "Progress in Particle and Nuclear Physics",

issn = "0146-6410",

publisher = "Elsevier",

number = "1",

}

Clement, H, Bashkanov, M, Bargholtz, C, Bogoslawsky, D, Calen, H, Cappellaro, F, Demiroers, L, Doroshkevich, E, Duniec, D, Ekström, C, Franssen, K, Geren, L, Gustafsson, L, Höistad, B, Ivanov, G, Jacewicz, M, Jiganov, E, Johansson, T, Kaskulov, M, Khakimova, O, Keleta, S, Koch, I, Kren, F, Kullander, S, Kupść, A, Kuznetsov, A, Lindberg, K, Marciniewski, P, Meier, R, Morosov, B, Pauly, C, Petterson, H, Petukhov, Y, Povtorejko, A, Pricking, A, Schönning, K, Scobel, W, Shwartz, B, Skorodko, T, Sopov, V, Stepeniak, J, Tegner, PE, Thörngren-Engblom, P, Tikhomirov, V, Wagner, GJ, Wolke, M, Yamamoto, A, Zabierowski, J, Zartova, I & Złomanczuk, J 2008, 'Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance', Progress in Particle and Nuclear Physics, vol. 61, no. 1, pp. 276-282. https://doi.org/10.1016/j.ppnp.2007.12.032

TY - JOUR

T1 - Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance

AU - Clement, H.

AU - Bashkanov, M.

AU - Bargholtz, C.

AU - Bogoslawsky, D.

AU - Calen, H.

AU - Cappellaro, F.

AU - Demiroers, L.

AU - Doroshkevich, E.

AU - Duniec, D.

AU - Ekström, C.

AU - Franssen, K.

AU - Geren, L.

AU - Gustafsson, L.

AU - Höistad, B.

AU - Ivanov, G.

AU - Jacewicz, M.

AU - Jiganov, E.

AU - Johansson, T.

AU - Kaskulov, M.

AU - Khakimova, O.

AU - Keleta, S.

AU - Koch, I.

AU - Kren, F.

AU - Kullander, S.

AU - Kupść, A.

AU - Kuznetsov, A.

AU - Lindberg, K.

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 - Schönning, K.

AU - Scobel, W.

AU - Shwartz, B.

AU - Skorodko, T.

AU - Sopov, V.

AU - Stepeniak, J.

AU - Tegner, P. E.

AU - Thörngren-Engblom, P.

AU - Tikhomirov, V.

AU - Wagner, G. J.

AU - Wolke, M.

AU - Yamamoto, A.

AU - Zabierowski, J.

AU - Zartova, I.

AU - Złomanczuk, J.

PY - 2008/7/1

Y1 - 2008/7/1

N2 - The ABC effect-an intriguing low-mass enhancement in the π π invariant mass spectrum-is known from inclusive measurements of two-pion production in nuclear fusion reactions. First exclusive measurements carried out at CELSIUS-WASA for the fusion reactions leading to d or 3He reveal this effect to be a σ-channel phenomenon associated with the formation of a Δ Δ system in the intermediate state and combined with a resonance-like behavior in the total cross-section. Together with the observation that the differential distributions do not change in shape over the resonance region the features fulfill the criteria of an isoscalar s-channel resonance in p n and N N π π systems, if the two emitted nucleons are bound. It obviously is robust enough to survive in nuclei as a dibaryonic resonance configuration. In this context also the phenomenon of N Δ resonances is reexamined.

AB - The ABC effect-an intriguing low-mass enhancement in the π π invariant mass spectrum-is known from inclusive measurements of two-pion production in nuclear fusion reactions. First exclusive measurements carried out at CELSIUS-WASA for the fusion reactions leading to d or 3He reveal this effect to be a σ-channel phenomenon associated with the formation of a Δ Δ system in the intermediate state and combined with a resonance-like behavior in the total cross-section. Together with the observation that the differential distributions do not change in shape over the resonance region the features fulfill the criteria of an isoscalar s-channel resonance in p n and N N π π systems, if the two emitted nucleons are bound. It obviously is robust enough to survive in nuclei as a dibaryonic resonance configuration. In this context also the phenomenon of N Δ resonances is reexamined.

KW - π π low-mass enhancement

KW - σ channel

KW - ABC effect

KW - Dibaryonic resonance

UR - http://www.scopus.com/inward/record.url?scp=43149122228&partnerID=8YFLogxK

U2 - 10.1016/j.ppnp.2007.12.032

DO - 10.1016/j.ppnp.2007.12.032

M3 - Short survey

AN - SCOPUS:43149122228

SN - 0146-6410

VL - 61

SP - 276

EP - 282

JO - Progress in Particle and Nuclear Physics

JF - Progress in Particle and Nuclear Physics

IS - 1

ER -

Single- and double-pion production in nucleon collisions on the nucleon and on nuclei-the ABC effect and its origin in a dibaryonic resonance

Abstract

Keywords

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