Evidence of the φ→ηπ0γ decay

Ачасов, М. Н.; Aulchenko, V.; Baru, S.E.; Berdyugin, A. V.; Bozhenok, A. V.; Bukin, A. D.; Bukin, D.A.; Burdin, S.; Dimova, T.; Dolinski, S.I.; Дружинин, В. П.; Dubrovin, M.; Gaponenko, I.; Голубев, В. Б.; Ivanchenko, V.N.; Ivanov, P.M.; Korol, A. A.; Koshuba, S. V.; Лысенко, А. П.; Пахтусова, Е. В.; Salnikov, A.; Serednyakov, S. I.; Shary, V.; Shatunov, Yu. M.; Sidorov, V.; Силагадзе, З. К.; Skrinsky, A.N.; Usov, Y.

doi:10.1016/s0370-2693(98)01152-6

Cited by 67 publications

(42 citation statements)

References 12 publications

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“…Now these decays have been studied not only theoretically but also experimentally. The first measurements have been reported by the SND [11,12,13,14] and CMD-2 [15] Collaborations which obtain the following branching ratios Br(φ → γπ 0 η) = (8.8 ± 1.4 ± 0.9) × 10 −5 [13],…”

Section: Introductionmentioning

confidence: 99%

New analysis of the KLOE data on theφ→ηπ0γdecay

2003

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Section: Introductionmentioning

confidence: 99%

New analysis of the KLOE data on theφ→ηπ0γdecay

2003

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“…These decays have been studied not only theoretically but also experimentally. Present time data have already been obtained from Novosibirsk with the detectors SND [7][8][9][10] and CMD-2 [11], which give the following branching ratios : BR(φ → γπη) = (0.88±0.14±0.09)·10 −4 [9], BR(φ → γπ 0 π 0 ) = (1.221±0.098±0.061)·10 −4 [10] and BR(φ → γπη) = (0.9±0.24±0.1)·10 −4 , BR(φ → γπ 0 π 0 ) = (0.92±0.08±0.06)·10…”

Section: Introductionmentioning

confidence: 99%

Analysis of the nature of theφ→γπηandφ→
Achasov
¹
,
Gubin
²

2001
Phys. Rev. D
144
13
203
0
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Analysis of the nature of the φ → γπη and φ → γπ AbstractWe study interference patterns in the φ → (γa 0 + π 0 ρ) → γπη and φ → (γf 0 + π 0 ρ) → γπ 0 π 0 reactions. Taking into account the interference, we fit the experimental data and show that the background reaction does not distort the π 0 η spectrum in the decay φ → γπη everywhere over the energy region and does not distort the π 0 π 0 spectrum in the decay φ → γπ 0 π 0 in the wide region of the π 0 π 0 system invariant mass, m ππ > 670 MeV, or when the photon energy is less than 300 MeV. We discuss the details of the scalar meson production in the radiative decays and note that there are reasonable arguments in favor of the one-loop mechanism φ → K + K − → γa 0 and φ → K + K − → γf 0 . We discuss also distinctions between the four-quark, molecular, and two-quark models and argue that the Novosibirsk data give evidence in favor of the four-quark nature of the scalar a 0 (980) and f 0 (980) mesons.12.39.-x, 13.40.Hq, 13.65.+i

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“…Interpretations still advocated in the literature include (1) the q 2q2 ("four-quark") cryptoexotic interpretation originally proposed by Jaffe [1] (see Refs. [2,3]); (2) the KK bound state, or "molecule", picture [4][5][6][7][8]; (3) the unitarized quark model picture [9][10][11][12][13]8]; and (4) the "minion" picture of Gribov [14].…”

Section: Introductionmentioning

confidence: 99%

“…An alternate means of testing the molecule scenario is via the processes φ → f 0 γ , a 0 γ [21]. Recent experimental determinations [22,23] give branching ratios larger than predicted in the molecule picture [21,24] but, since the predictions of Refs. [21] and [24] differ by a factor of 4, realistic theoretical uncertainties may be large, making the discrepancy with experiment difficult to interpret reliably.…”

Section: Introductionmentioning

confidence: 99%

The a0(980), a0(1450) and scalar decay constants and the isovector scalar spectrum

Maltman¹

1999

Physics Letters B

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The scalar correlator Π(q 2 ) = i d 4 x e iq·x 0|T J(x)J † (0) |0 (with J = ∂ µ d γ µ u ) is studied using a class of finite energy sum rules shown recently to be very well satisfied in the vector isovector channel. The values of the a 0 scalar decay constants extracted in this analysis, which describe the couplings of the a 0 (980) and a 0 (1450) to the current J, are shown to be comparable, strongly disfavoring any scenario in which the a 0 (980) is interpreted as a loosely bound KK molecule and the a 0 (1450) is assigned to the same flavor multiplet as the K * 0 (1430). The a 0 decay constants are also compared to the analogous decay constant describing the coupling of the K * 0 (1430) to the divergence of the strange vector current, J s = ∂ µ (sγ µ u) (which may be obtained from experimental K e3 and Kπ phase shift data) and implications of the relative magnitudes for the interpretation of the nature of the a 0 states discussed.

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Evidence of the φ→ηπ0γ decay

Cited by 67 publications

References 12 publications

New analysis of the KLOE data on theφ→ηπ0γdecay

New analysis of the KLOE data on theφ→ηπ0γdecay

Analysis of the nature of theφ→γπηandφ→
Achasov
¹
,
Gubin
²

2001
Phys. Rev. D
144
13
203
0
View full text Add to dashboard Cite

The a0(980), a0(1450) and scalar decay constants and the isovector scalar spectrum

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Evidence of the φ→ηπ0γ decay

Cited by 67 publications

References 12 publications

New analysis of the KLOE data on theφ→ηπ0γdecay

New analysis of the KLOE data on theφ→ηπ0γdecay

Analysis of the nature of theφ→γπηandφ→Achasov1, Gubin2 2001Phys. Rev. D144132030View full textAdd to dashboardCite

The a0(980), a0(1450) and scalar decay constants and the isovector scalar spectrum

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Analysis of the nature of theφ→γπηandφ→
Achasov
¹
,
Gubin
²

2001
Phys. Rev. D
144
13
203
0
View full text Add to dashboard Cite