ABC effect and resonance structure in the double-pionic fusion to He-3

WASA-At-COSY Collaboration; P. Adlarson; W. Augustyniak; W. Bardan; M. Bashkanov; F. S. Bergmann; M. Berlowski; H. Bhatt; A. Bondar; M. Buescher; H. Calen; I. Ciepal; H. Clement; D. Coderre; E. Czerwinski; K. Demmich; E. Doroshkevich; R. Engels; A. Erven; W. Erven; W. Eyrich; P. Fedorets; K. Foehl; K. Fransson; F. Goldenbaum; P. Goslawski; A. Goswami; K. Grigoryev; C. -O. Gullstrom; F. Hauenstein; L. Heijkenskjold; V. Hejny; B. Hoistad; N. Huesken; L. Jarczyk; T. Johansson; B. Kamys; G. Kemmerling; F. A. Khan; A. Khoukaz; D. A. Kirillov; S. Kistryn; H. Kleines; B. Klos; W. Krzemien; P. Kulessa; A. Kupsc; A. Kuzmin; K. Lalwani; D. Lersch; B. Lorentz

doi:10.1103/PhysRevC.91.015201

ABC effect and resonance structure in the double-pionic fusion to He-3

WASA-At-COSY Collaboration, P. Adlarson, W. Augustyniak, W. Bardan, M. Bashkanov, F. S. Bergmann, M. Berlowski, H. Bhatt, A. Bondar, M. Buescher, H. Calen, I. Ciepal, H. Clement^*, D. Coderre, E. Czerwinski, K. Demmich, E. Doroshkevich, R. Engels, A. Erven, W. ErvenW. Eyrich, P. Fedorets, K. Foehl, K. Fransson, F. Goldenbaum, P. Goslawski, A. Goswami, K. Grigoryev, C. -O. Gullstrom, F. Hauenstein, L. Heijkenskjold, V. Hejny, B. Hoistad, N. Huesken, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, F. A. Khan, A. Khoukaz, D. A. Kirillov, S. Kistryn, H. Kleines, B. Klos, W. Krzemien, P. Kulessa, A. Kupsc, A. Kuzmin, K. Lalwani, D. Lersch, B. Lorentz

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract / Description of output

Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY (the cooler synchrotron at Forschungszentrum Julich). Similar to the observations in the basic pn -> d pi(0)pi(0) reaction and in the dd -> He-4 pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. Differential cross sections are well described by the hypothesis of d* resonance formation during the reaction process in addition to the conventional t-channel Delta Delta mechanism. The deduced d* resonance width can be understood from collision broadening due to Fermi motion of the nucleons in initial and final nuclei.

Original language	English
Article number	015201
Number of pages	8
Journal	Physical Review C
Volume	91
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.91.015201
Publication status	Published - 6 Jan 2015

Keywords / Materials (for Non-textual outputs)

PROTON-PROTON COLLISIONS
PI-PI INTERACTION
MESON PRODUCTION
GEV-C
ISOSPIN DECOMPOSITION
PI(0)PI(0) PRODUCTION
NEAR-THRESHOLD
NUCLEAR-MATTER
ENHANCEMENT
DIBARYONS

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10.1103/PhysRevC.91.015201

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WASA-At-COSY Collaboration, Adlarson, P., Augustyniak, W., Bardan, W., Bashkanov, M., Bergmann, F. S., Berlowski, M., Bhatt, H., Bondar, A., Buescher, M., Calen, H., Ciepal, I., Clement, H., Coderre, D., Czerwinski, E., Demmich, K., Doroshkevich, E., Engels, R., Erven, A., ... Lorentz, B. (2015). ABC effect and resonance structure in the double-pionic fusion to He-3. Physical Review C, 91(1), Article 015201. https://doi.org/10.1103/PhysRevC.91.015201

@article{ef724c574d494f50aa91b5810e952f0d,

title = "ABC effect and resonance structure in the double-pionic fusion to He-3",

abstract = "Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY (the cooler synchrotron at Forschungszentrum Julich). Similar to the observations in the basic pn -> d pi(0)pi(0) reaction and in the dd -> He-4 pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. Differential cross sections are well described by the hypothesis of d* resonance formation during the reaction process in addition to the conventional t-channel Delta Delta mechanism. The deduced d* resonance width can be understood from collision broadening due to Fermi motion of the nucleons in initial and final nuclei.",

keywords = "PROTON-PROTON COLLISIONS, PI-PI INTERACTION, MESON PRODUCTION, GEV-C, ISOSPIN DECOMPOSITION, PI(0)PI(0) PRODUCTION, NEAR-THRESHOLD, NUCLEAR-MATTER, ENHANCEMENT, DIBARYONS",

author = "{WASA-At-COSY Collaboration} and P. Adlarson and W. Augustyniak and W. Bardan and M. Bashkanov and Bergmann, {F. S.} and M. Berlowski and H. Bhatt and A. Bondar and M. Buescher and H. Calen and I. Ciepal and H. Clement and D. Coderre and E. Czerwinski and K. Demmich and E. Doroshkevich and R. Engels and A. Erven and W. Erven and W. Eyrich and P. Fedorets and K. Foehl and K. Fransson and F. Goldenbaum and P. Goslawski and A. Goswami and K. Grigoryev and Gullstrom, {C. -O.} and F. Hauenstein and L. Heijkenskjold and V. Hejny and B. Hoistad and N. Huesken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and Khan, {F. A.} and A. Khoukaz and Kirillov, {D. A.} and S. Kistryn and H. Kleines and B. Klos and W. Krzemien and P. Kulessa and A. Kupsc and A. Kuzmin and K. Lalwani and D. Lersch and B. Lorentz",

year = "2015",

month = jan,

day = "6",

doi = "10.1103/PhysRevC.91.015201",

language = "English",

volume = "91",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "1",

}

WASA-At-COSY Collaboration, Adlarson, P, Augustyniak, W, Bardan, W, Bashkanov, M, Bergmann, FS, Berlowski, M, Bhatt, H, Bondar, A, Buescher, M, Calen, H, Ciepal, I, Clement, H, Coderre, D, Czerwinski, E, Demmich, K, Doroshkevich, E, Engels, R, Erven, A, Erven, W, Eyrich, W, Fedorets, P, Foehl, K, Fransson, K, Goldenbaum, F, Goslawski, P, Goswami, A, Grigoryev, K, Gullstrom, C-O, Hauenstein, F, Heijkenskjold, L, Hejny, V, Hoistad, B, Huesken, N, Jarczyk, L, Johansson, T, Kamys, B, Kemmerling, G, Khan, FA, Khoukaz, A, Kirillov, DA, Kistryn, S, Kleines, H, Klos, B, Krzemien, W, Kulessa, P, Kupsc, A, Kuzmin, A, Lalwani, K, Lersch, D & Lorentz, B 2015, 'ABC effect and resonance structure in the double-pionic fusion to He-3', Physical Review C, vol. 91, no. 1, 015201. https://doi.org/10.1103/PhysRevC.91.015201

TY - JOUR

T1 - ABC effect and resonance structure in the double-pionic fusion to He-3

AU - WASA-At-COSY Collaboration

AU - Adlarson, P.

AU - Augustyniak, W.

AU - Bardan, W.

AU - Bashkanov, M.

AU - Bergmann, F. S.

AU - Berlowski, M.

AU - Bhatt, H.

AU - Bondar, A.

AU - Buescher, M.

AU - Calen, H.

AU - Ciepal, I.

AU - Clement, H.

AU - Coderre, D.

AU - Czerwinski, E.

AU - Demmich, K.

AU - Doroshkevich, E.

AU - Engels, R.

AU - Erven, A.

AU - Erven, W.

AU - Eyrich, W.

AU - Fedorets, P.

AU - Foehl, K.

AU - Fransson, K.

AU - Goldenbaum, F.

AU - Goslawski, P.

AU - Goswami, A.

AU - Grigoryev, K.

AU - Gullstrom, C. -O.

AU - Hauenstein, F.

AU - Heijkenskjold, L.

AU - Hejny, V.

AU - Hoistad, B.

AU - Huesken, N.

AU - Jarczyk, L.

AU - Johansson, T.

AU - Kamys, B.

AU - Kemmerling, G.

AU - Khan, F. A.

AU - Khoukaz, A.

AU - Kirillov, D. A.

AU - Kistryn, S.

AU - Kleines, H.

AU - Klos, B.

AU - Krzemien, W.

AU - Kulessa, P.

AU - Kupsc, A.

AU - Kuzmin, A.

AU - Lalwani, K.

AU - Lersch, D.

AU - Lorentz, B.

PY - 2015/1/6

Y1 - 2015/1/6

N2 - Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY (the cooler synchrotron at Forschungszentrum Julich). Similar to the observations in the basic pn -> d pi(0)pi(0) reaction and in the dd -> He-4 pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. Differential cross sections are well described by the hypothesis of d* resonance formation during the reaction process in addition to the conventional t-channel Delta Delta mechanism. The deduced d* resonance width can be understood from collision broadening due to Fermi motion of the nucleons in initial and final nuclei.

AB - Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY (the cooler synchrotron at Forschungszentrum Julich). Similar to the observations in the basic pn -> d pi(0)pi(0) reaction and in the dd -> He-4 pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. Differential cross sections are well described by the hypothesis of d* resonance formation during the reaction process in addition to the conventional t-channel Delta Delta mechanism. The deduced d* resonance width can be understood from collision broadening due to Fermi motion of the nucleons in initial and final nuclei.

KW - PROTON-PROTON COLLISIONS

KW - PI-PI INTERACTION

KW - MESON PRODUCTION

KW - GEV-C

KW - ISOSPIN DECOMPOSITION

KW - PI(0)PI(0) PRODUCTION

KW - NEAR-THRESHOLD

KW - NUCLEAR-MATTER

KW - ENHANCEMENT

KW - DIBARYONS

U2 - 10.1103/PhysRevC.91.015201

DO - 10.1103/PhysRevC.91.015201

M3 - Article

SN - 0556-2813

VL - 91

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 015201

ER -

ABC effect and resonance structure in the double-pionic fusion to He-3

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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