Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction

WASA-At-COSY Collaboration

doi:10.1103/PhysRevC.99.025201

Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction

WASA-At-COSY Collaboration

Physics

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

Abstract

The quasifree pp → ppπ+π− reaction has been measured by means of pd collisions at Tp = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region Tp = 1.08–1.36 GeV (√s = 2.35–2.46 GeV) covering thus the regions of N∗(1440) and (1232)(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp → ppπ0π0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor N dibaryon resonance with I (J P ) = 2(1+) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

Original language	English
Article number	025201
Number of pages	13
Journal	Physical Review C
Volume	99
DOIs	https://doi.org/10.1103/PhysRevC.99.025201
Publication status	Published - 4 Feb 2018

Bibliographical note

Keywords

nucl-ex
hep-ex

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10.1103/PhysRevC.99.025201

PhysRevC.99.025201
©2019 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
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Cite this

@article{245173b937f84de4924f195b428ea607,

title = "Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction",

abstract = " The quasifree pp → ppπ+π− reaction has been measured by means of pd collisions at Tp = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region Tp = 1.08–1.36 GeV (√s = 2.35–2.46 GeV) covering thus the regions of N∗(1440) and (1232)(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp → ppπ0π0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor N dibaryon resonance with I (J P ) = 2(1+) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].",

keywords = "nucl-ex, hep-ex",

author = "{WASA-At-COSY Collaboration} and P. Adlarson and W. Augustyniak and W. Bardan and M. Bashkanov and Bergmann, {F. S.} and M. Ber{\l}owski and A. Bondar and M. B{\"u}scher and H. Cal{\'e}n and I. Ciepa{\l} and H. Clement and E. Czerwi{\'n}ski and K. Demmich and R. Engels and A. Erven and W. Erven and W. Eyrich and P. Fedorets and K. F{\"o}hl and K. Fransson and F. Goldenbaum and A. Goswami and K. Grigoryev and L. Heijkenskj{\"o}ld and V. Hejny and N. H{\"u}sken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and A. Khoukaz and O. Khreptak and Kirillov, {D. A.} and S. Kistryn and H. Kleines and B. K{\l}os and W. Krzemie{\'n} and P. Kulessa and A. Kup{\'s}{\'c} and K. Lalwani and D. Lersch and B. Lorentz and A. Magiera and P. Marciniewski and B. Maria{\'n}ski and Morsch, {H. --P.} and P. Moskal and H. Ohm and W. Parol and Rio, {E. Perez del}",

note = "{\textcopyright}2019 American Physical Society. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details",

year = "2018",

month = feb,

day = "4",

doi = "10.1103/PhysRevC.99.025201",

language = "English",

volume = "99",

journal = "Physical Review C",

issn = "0556-2813",

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TY - JOUR

T1 - Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction

AU - WASA-At-COSY Collaboration

AU - Adlarson, P.

AU - Augustyniak, W.

AU - Bardan, W.

AU - Bashkanov, M.

AU - Bergmann, F. S.

AU - Berłowski, M.

AU - Bondar, A.

AU - Büscher, M.

AU - Calén, H.

AU - Ciepał, I.

AU - Clement, H.

AU - Czerwiński, E.

AU - Demmich, K.

AU - Engels, R.

AU - Erven, A.

AU - Erven, W.

AU - Eyrich, W.

AU - Fedorets, P.

AU - Föhl, K.

AU - Fransson, K.

AU - Goldenbaum, F.

AU - Goswami, A.

AU - Grigoryev, K.

AU - Heijkenskjöld, L.

AU - Hejny, V.

AU - Hüsken, N.

AU - Jarczyk, L.

AU - Johansson, T.

AU - Kamys, B.

AU - Kemmerling, G.

AU - Khoukaz, A.

AU - Khreptak, O.

AU - Kirillov, D. A.

AU - Kistryn, S.

AU - Kleines, H.

AU - Kłos, B.

AU - Krzemień, W.

AU - Kulessa, P.

AU - Kupść, A.

AU - Lalwani, K.

AU - Lersch, D.

AU - Lorentz, B.

AU - Magiera, A.

AU - Marciniewski, P.

AU - Mariański, B.

AU - Morsch, H. --P.

AU - Moskal, P.

AU - Ohm, H.

AU - Parol, W.

AU - Rio, E. Perez del

PY - 2018/2/4

Y1 - 2018/2/4

N2 - The quasifree pp → ppπ+π− reaction has been measured by means of pd collisions at Tp = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region Tp = 1.08–1.36 GeV (√s = 2.35–2.46 GeV) covering thus the regions of N∗(1440) and (1232)(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp → ppπ0π0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor N dibaryon resonance with I (J P ) = 2(1+) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

AB - The quasifree pp → ppπ+π− reaction has been measured by means of pd collisions at Tp = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region Tp = 1.08–1.36 GeV (√s = 2.35–2.46 GeV) covering thus the regions of N∗(1440) and (1232)(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp → ppπ0π0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor N dibaryon resonance with I (J P ) = 2(1+) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

KW - nucl-ex

KW - hep-ex

U2 - 10.1103/PhysRevC.99.025201

DO - 10.1103/PhysRevC.99.025201

M3 - Article

SN - 0556-2813

VL - 99

JO - Physical Review C

JF - Physical Review C

M1 - 025201

ER -