Observation of a(0)(0)(980)-f(0)(980) Mixing

BESIII Collaboration; Zahra Haddadi; Nasser Kalantar-Nayestanaki; Myroslav Kavatsyuk; Johannes Messchendorp; Marcel Tiemens

doi:10.1103/PhysRevLett.121.022001

Observation of a(0)(0)(980)-f(0)(980) Mixing

BESIII Collaboration, Zahra Haddadi, Nasser Kalantar-Nayestanaki, Myroslav Kavatsyuk, Johannes Messchendorp, Marcel Tiemens

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We report the first observation of a(0)(0)(980)-f(0)(980) mixing in the decays of J/psi -> phi f(0)(980) -> phi a(0)(0)(980) -> phi eta pi(0) and chi(c1) -> a(0)(0)(980)pi(0) -> f(0)(980)pi(0)->pi(+)pi(-)pi(0), using data samples of 1.31 x 10(9) J/psi events and 4.48 x 10(8) psi (3686) events accumulated with the BESIII detector. The signals of f(0)(980) -> a(0)(0)(980) and a(0)(0)(980) -> f(0)(980) mixing are observed at levels of statistical significance of 7.4 sigma and 5.5 sigma, respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, g(a0K+K-) and g(f0K+K-), are estimated. The results improve the understanding of the nature of a(0)(0)(980) and f(0)(980).

Originele taal-2	English
Aantal pagina's	8
Tijdschrift	Physical Review Letters
Volume	121
Nummer van het tijdschrift	2
DOI's	https://doi.org/10.1103/PhysRevLett.121.022001
Status	Published - 11-jul.-2018

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@article{e7449d4f2e974b14b9f41a3e195d834b,

title = "Observation of a(0)(0)(980)-f(0)(980) Mixing",

abstract = "We report the first observation of a(0)(0)(980)-f(0)(980) mixing in the decays of J/psi -> phi f(0)(980) -> phi a(0)(0)(980) -> phi eta pi(0) and chi(c1) -> a(0)(0)(980)pi(0) -> f(0)(980)pi(0)->pi(+)pi(-)pi(0), using data samples of 1.31 x 10(9) J/psi events and 4.48 x 10(8) psi (3686) events accumulated with the BESIII detector. The signals of f(0)(980) -> a(0)(0)(980) and a(0)(0)(980) -> f(0)(980) mixing are observed at levels of statistical significance of 7.4 sigma and 5.5 sigma, respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, g(a0K+K-) and g(f0K+K-), are estimated. The results improve the understanding of the nature of a(0)(0)(980) and f(0)(980).",

keywords = "KLOE DETECTOR, DECAY, MESONS",

author = "{BESIII Collaboration} and Zahra Haddadi and Nasser Kalantar-Nayestanaki and Myroslav Kavatsyuk and Johannes Messchendorp and Marcel Tiemens",

year = "2018",

month = jul,

day = "11",

doi = "10.1103/PhysRevLett.121.022001",

language = "English",

volume = "121",

journal = "Physical Review Letters",

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publisher = "AMER PHYSICAL SOC",

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T1 - Observation of a(0)(0)(980)-f(0)(980) Mixing

AU - BESIII Collaboration

AU - Haddadi, Zahra

AU - Kalantar-Nayestanaki, Nasser

AU - Kavatsyuk, Myroslav

AU - Messchendorp, Johannes

AU - Tiemens, Marcel

PY - 2018/7/11

Y1 - 2018/7/11

N2 - We report the first observation of a(0)(0)(980)-f(0)(980) mixing in the decays of J/psi -> phi f(0)(980) -> phi a(0)(0)(980) -> phi eta pi(0) and chi(c1) -> a(0)(0)(980)pi(0) -> f(0)(980)pi(0)->pi(+)pi(-)pi(0), using data samples of 1.31 x 10(9) J/psi events and 4.48 x 10(8) psi (3686) events accumulated with the BESIII detector. The signals of f(0)(980) -> a(0)(0)(980) and a(0)(0)(980) -> f(0)(980) mixing are observed at levels of statistical significance of 7.4 sigma and 5.5 sigma, respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, g(a0K+K-) and g(f0K+K-), are estimated. The results improve the understanding of the nature of a(0)(0)(980) and f(0)(980).

AB - We report the first observation of a(0)(0)(980)-f(0)(980) mixing in the decays of J/psi -> phi f(0)(980) -> phi a(0)(0)(980) -> phi eta pi(0) and chi(c1) -> a(0)(0)(980)pi(0) -> f(0)(980)pi(0)->pi(+)pi(-)pi(0), using data samples of 1.31 x 10(9) J/psi events and 4.48 x 10(8) psi (3686) events accumulated with the BESIII detector. The signals of f(0)(980) -> a(0)(0)(980) and a(0)(0)(980) -> f(0)(980) mixing are observed at levels of statistical significance of 7.4 sigma and 5.5 sigma, respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, g(a0K+K-) and g(f0K+K-), are estimated. The results improve the understanding of the nature of a(0)(0)(980) and f(0)(980).

KW - KLOE DETECTOR

KW - DECAY

KW - MESONS

U2 - 10.1103/PhysRevLett.121.022001

DO - 10.1103/PhysRevLett.121.022001

M3 - Article

SN - 0031-9007

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

ER -