Delta Delta excitation in proton-proton induced pi(0)pi(0) production

T. Skorodko; M. Bashkanov; D. Bogoslawsky; H. Calen; H. Clement; E. Doroshkevich; L. Demiroers; C. Ekstrom; K. Fransson; L. Gustafsson; B. Hoistad; 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. Petren; Y. Petukhov; A. Povtorejko; R. J. M. Y. Ruber; K. Schonning; W. Scobel; B. Shwartz; J. Stepaniak; P. Thorngren-Engblom; V. Tikhomirov; G. J. Wagner; M. Wolke; A. Yamamoto; J. Zabierowski; J. Zlomanczuk

doi:10.1016/j.physletb.2010.11.030

Delta Delta excitation in proton-proton induced pi(0)pi(0) production

T. Skorodko, M. Bashkanov, D. Bogoslawsky, H. Calen, H. Clement^*, E. Doroshkevich, L. Demiroers, C. Ekstrom, K. Fransson, L. Gustafsson, B. Hoistad, 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. Petren, Y. Petukhov, A. Povtorejko, R. J. M. Y. Ruber, K. Schonning, W. Scobel, B. Shwartz, J. Stepaniak, P. Thorngren-Engblom, V. Tikhomirov, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowski, J. Zlomanczuk

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

Exclusive measurements of the pp -> pp pi(0)pi(0) reaction have been performed at CELSIUS/WASA at energies from threshold up to T-p = 1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies T-p >= GeV. where the Delta Delta excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel Delta Delta excitation. This holds also for the double-pionic fusion to the quasibound He-2. The data are compared to model predictions, which are based on both pi- and rho-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the rho-exchange. A phenomenological modification allowing only a small rho-exchange contribution leads to a quantitative description of the data. (C) 2010 Elsevier B.V. All rights reserved.

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

Keywords / Materials (for Non-textual outputs)

Delta Delta excitation
Two-pion production
pi-exchange
rho-exchange
BOSE-EINSTEIN CORRELATIONS
DOUBLE-PION PRODUCTION
2-PION PRODUCTION
ROPER RESONANCE
NUCLEON COLLISIONS
SINGLE-PION
PP
ENHANCEMENT
THRESHOLD

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10.1016/j.physletb.2010.11.030

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Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calen, H., Clement, H., Doroshkevich, E., Demiroers, L., Ekstrom, C., Fransson, K., Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kren, F., ... Zlomanczuk, J. (2011). Delta Delta excitation in proton-proton induced pi(0)pi(0) production. Physics Letters B, 695(1-4), 115-123. https://doi.org/10.1016/j.physletb.2010.11.030

@article{873f98e61fc94e8ea4c0acc14cc02089,

title = "Delta Delta excitation in proton-proton induced pi(0)pi(0) production",

abstract = "Exclusive measurements of the pp -> pp pi(0)pi(0) reaction have been performed at CELSIUS/WASA at energies from threshold up to T-p = 1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies T-p >= GeV. where the Delta Delta excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel Delta Delta excitation. This holds also for the double-pionic fusion to the quasibound He-2. The data are compared to model predictions, which are based on both pi- and rho-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the rho-exchange. A phenomenological modification allowing only a small rho-exchange contribution leads to a quantitative description of the data. (C) 2010 Elsevier B.V. All rights reserved.",

keywords = "Delta Delta excitation, Two-pion production, pi-exchange, rho-exchange, BOSE-EINSTEIN CORRELATIONS, DOUBLE-PION PRODUCTION, 2-PION PRODUCTION, ROPER RESONANCE, NUCLEON COLLISIONS, SINGLE-PION, PP, ENHANCEMENT, THRESHOLD",

author = "T. Skorodko and M. Bashkanov and D. Bogoslawsky and H. Calen and H. Clement and E. Doroshkevich and L. Demiroers and C. Ekstrom and K. Fransson and L. Gustafsson and B. Hoistad 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. Petren and Y. Petukhov and A. Povtorejko and Ruber, {R. J. M. Y.} and K. Schonning and W. Scobel and B. Shwartz and J. Stepaniak and P. Thorngren-Engblom and V. Tikhomirov and Wagner, {G. J.} and M. Wolke and A. Yamamoto and J. Zabierowski and J. Zlomanczuk",

year = "2011",

month = jan,

day = "10",

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

language = "English",

volume = "695",

pages = "115--123",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-4",

}

Skorodko, T, Bashkanov, M, Bogoslawsky, D, Calen, H, Clement, H, Doroshkevich, E, Demiroers, L, Ekstrom, C, Fransson, K, Gustafsson, L, Hoistad, 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, Petren, H, Petukhov, Y, Povtorejko, A, Ruber, RJMY, Schonning, K, Scobel, W, Shwartz, B, Stepaniak, J, Thorngren-Engblom, P, Tikhomirov, V, Wagner, GJ, Wolke, M, Yamamoto, A, Zabierowski, J & Zlomanczuk, J 2011, 'Delta Delta excitation in proton-proton induced pi(0)pi(0) production', Physics Letters B, vol. 695, no. 1-4, pp. 115-123. https://doi.org/10.1016/j.physletb.2010.11.030

TY - JOUR

T1 - Delta Delta excitation in proton-proton induced pi(0)pi(0) production

AU - Skorodko, T.

AU - Bashkanov, M.

AU - Bogoslawsky, D.

AU - Calen, H.

AU - Clement, H.

AU - Doroshkevich, E.

AU - Demiroers, L.

AU - Ekstrom, C.

AU - Fransson, K.

AU - Gustafsson, L.

AU - Hoistad, 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 - Petren, H.

AU - Petukhov, Y.

AU - Povtorejko, A.

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

AU - Schonning, K.

AU - Scobel, W.

AU - Shwartz, B.

AU - Stepaniak, J.

AU - Thorngren-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 -> pp pi(0)pi(0) reaction have been performed at CELSIUS/WASA at energies from threshold up to T-p = 1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies T-p >= GeV. where the Delta Delta excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel Delta Delta excitation. This holds also for the double-pionic fusion to the quasibound He-2. The data are compared to model predictions, which are based on both pi- and rho-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the rho-exchange. A phenomenological modification allowing only a small rho-exchange contribution leads to a quantitative description of the data. (C) 2010 Elsevier B.V. All rights reserved.

AB - Exclusive measurements of the pp -> pp pi(0)pi(0) reaction have been performed at CELSIUS/WASA at energies from threshold up to T-p = 1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies T-p >= GeV. where the Delta Delta excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel Delta Delta excitation. This holds also for the double-pionic fusion to the quasibound He-2. The data are compared to model predictions, which are based on both pi- and rho-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the rho-exchange. A phenomenological modification allowing only a small rho-exchange contribution leads to a quantitative description of the data. (C) 2010 Elsevier B.V. All rights reserved.

KW - Delta Delta excitation

KW - Two-pion production

KW - pi-exchange

KW - rho-exchange

KW - BOSE-EINSTEIN CORRELATIONS

KW - DOUBLE-PION PRODUCTION

KW - 2-PION PRODUCTION

KW - ROPER RESONANCE

KW - NUCLEON COLLISIONS

KW - SINGLE-PION

KW - PP

KW - ENHANCEMENT

KW - THRESHOLD

U2 - 10.1016/j.physletb.2010.11.030

DO - 10.1016/j.physletb.2010.11.030

M3 - Article

SN - 0370-2693

VL - 695

SP - 115

EP - 123

JO - Physics Letters B

JF - Physics Letters B

IS - 1-4

ER -

Delta Delta excitation in proton-proton induced pi(0)pi(0) production

Abstract

Keywords / Materials (for Non-textual outputs)

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