Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration

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; E. Czerwinski; K. Demmich; R. Engels; A. Erven; W. Erven; W. Eyrich; P. Fedorets; K. Foehl; K. Fransson; F. Goldenbaum; A. Goswami; K. Grigoryev; C. -O. Gullstrom; L. Heijkenskjold; V. Hejny; N. Huesken; L. Jarczyk; T. Johansson; B. Kamys; G. Kemmerling; F. A. Khan; G. Khatri; A. Khoukaz; O. Khreptak; D. A. Kirillov; S. Kistryn; H. Kleines; B. Klos; W. Krzemien; P. Kulessa; A. Kupsc; A. Kuzmin; K. Lalwani; D. Lersch; B. Lorentz; A. Magiera; R. Maier; P. Marciniewski

doi:10.1016/j.physletb.2017.03.050

Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration

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, E. Czerwinski, K. Demmich, R. Engels, A. Erven, W. Erven, W. Eyrich, P. FedoretsK. Foehl, K. Fransson, F. Goldenbaum, A. Goswami, K. Grigoryev, C. -O. Gullstrom, L. Heijkenskjold, V. Hejny, N. Huesken, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, F. A. Khan, G. Khatri, A. Khoukaz, O. Khreptak, D. A. Kirillov, S. Kistryn, H. Kleines, B. Klos, W. Krzemien, P. Kulessa, A. Kupsc, A. Kuzmin, K. Lalwani, D. Lersch, B. Lorentz, A. Magiera, R. Maier, P. Marciniewski

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

Abstract

Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042) x 10(4) events. The Dalitz plot density is parametrised by a product of the P-wave phase space and a polynomial expansion in the normalised polar Dalitz plot variables Z and phi. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1 sigma. The deviation is parametrised by a linear term 1+2 alpha Z, with alpha determined to be +0.147 +/- 0.036, consistent with the expectations of rho-meson-type final-state interactions of the P-wave pion pairs. (C) 2017 The Author. Published by Elsevier B.V.

Original language	English
Pages (from-to)	418-425
Number of pages	8
Journal	Physics Letters B
Volume	770
DOIs	https://doi.org/10.1016/j.physletb.2017.03.050
Publication status	Published - 25 Apr 2017

Keywords / Materials (for Non-textual outputs)

Decays of other mesons
Meson-meson interactions
Light mesons
TRANSITION FORM-FACTORS
LIGHT VECTOR-MESONS
PI-PI-SCATTERING
DISPERSIVE ANALYSIS
DECAYS
ETA
MU(+)MU(-)GAMMA
DETECTOR
PARITY
NA60

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10.1016/j.physletb.2017.03.050

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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., Czerwinski, E., Demmich, K., Engels, R., Erven, A., Erven, W., Eyrich, W., ... Marciniewski, P. (2017). Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration. Physics Letters B, 770, 418-425. https://doi.org/10.1016/j.physletb.2017.03.050

@article{0f3bb576d5e142419c1673c63ce30cbc,

title = "Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration",

abstract = "Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042) x 10(4) events. The Dalitz plot density is parametrised by a product of the P-wave phase space and a polynomial expansion in the normalised polar Dalitz plot variables Z and phi. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1 sigma. The deviation is parametrised by a linear term 1+2 alpha Z, with alpha determined to be +0.147 +/- 0.036, consistent with the expectations of rho-meson-type final-state interactions of the P-wave pion pairs. (C) 2017 The Author. Published by Elsevier B.V.",

keywords = "Decays of other mesons, Meson-meson interactions, Light mesons, TRANSITION FORM-FACTORS, LIGHT VECTOR-MESONS, PI-PI-SCATTERING, DISPERSIVE ANALYSIS, DECAYS, ETA, MU(+)MU(-)GAMMA, DETECTOR, PARITY, NA60",

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 E. Czerwinski and K. Demmich 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 A. Goswami and K. Grigoryev and Gullstrom, {C. -O.} and L. Heijkenskjold and V. Hejny and N. Huesken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and Khan, {F. A.} and G. Khatri and A. Khoukaz and O. Khreptak 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 and A. Magiera and R. Maier and P. Marciniewski",

year = "2017",

month = apr,

day = "25",

doi = "10.1016/j.physletb.2017.03.050",

language = "English",

volume = "770",

pages = "418--425",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

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, Czerwinski, E, Demmich, K, Engels, R, Erven, A, Erven, W, Eyrich, W, Fedorets, P, Foehl, K, Fransson, K, Goldenbaum, F, Goswami, A, Grigoryev, K, Gullstrom, C-O, Heijkenskjold, L, Hejny, V, Huesken, N, Jarczyk, L, Johansson, T, Kamys, B, Kemmerling, G, Khan, FA, Khatri, G, Khoukaz, A, Khreptak, O, Kirillov, DA, Kistryn, S, Kleines, H, Klos, B, Krzemien, W, Kulessa, P, Kupsc, A, Kuzmin, A, Lalwani, K, Lersch, D, Lorentz, B, Magiera, A, Maier, R & Marciniewski, P 2017, 'Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration', Physics Letters B, vol. 770, pp. 418-425. https://doi.org/10.1016/j.physletb.2017.03.050

TY - JOUR

T1 - Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration

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 - Czerwinski, E.

AU - Demmich, K.

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 - Goswami, A.

AU - Grigoryev, K.

AU - Gullstrom, C. -O.

AU - Heijkenskjold, L.

AU - Hejny, V.

AU - Huesken, N.

AU - Jarczyk, L.

AU - Johansson, T.

AU - Kamys, B.

AU - Kemmerling, G.

AU - Khan, F. A.

AU - Khatri, G.

AU - Khoukaz, A.

AU - Khreptak, O.

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.

AU - Magiera, A.

AU - Maier, R.

AU - Marciniewski, P.

PY - 2017/4/25

Y1 - 2017/4/25

N2 - Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042) x 10(4) events. The Dalitz plot density is parametrised by a product of the P-wave phase space and a polynomial expansion in the normalised polar Dalitz plot variables Z and phi. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1 sigma. The deviation is parametrised by a linear term 1+2 alpha Z, with alpha determined to be +0.147 +/- 0.036, consistent with the expectations of rho-meson-type final-state interactions of the P-wave pion pairs. (C) 2017 The Author. Published by Elsevier B.V.

AB - Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042) x 10(4) events. The Dalitz plot density is parametrised by a product of the P-wave phase space and a polynomial expansion in the normalised polar Dalitz plot variables Z and phi. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1 sigma. The deviation is parametrised by a linear term 1+2 alpha Z, with alpha determined to be +0.147 +/- 0.036, consistent with the expectations of rho-meson-type final-state interactions of the P-wave pion pairs. (C) 2017 The Author. Published by Elsevier B.V.

KW - Decays of other mesons

KW - Meson-meson interactions

KW - Light mesons

KW - TRANSITION FORM-FACTORS

KW - LIGHT VECTOR-MESONS

KW - PI-PI-SCATTERING

KW - DISPERSIVE ANALYSIS

KW - DECAYS

KW - ETA

KW - MU(+)MU(-)GAMMA

KW - DETECTOR

KW - PARITY

KW - NA60

U2 - 10.1016/j.physletb.2017.03.050

DO - 10.1016/j.physletb.2017.03.050

M3 - Article

SN - 0370-2693

VL - 770

SP - 418

EP - 425

JO - Physics Letters B

JF - Physics Letters B

ER -

Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution The WASA-at-COSY Collaboration

Abstract

Keywords / Materials (for Non-textual outputs)

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