Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη

M. Ablikim; M. N. Achasov; X. C. Ai; O.  Albayrak; M. Albrecht; D. J. Ambrose; A. Amoroso; Z. Haddadi; N. Kalantar-Nayestanaki; M. Kavatsyuk; H. Löhner; J. G. Messchendorp; M. Tiemens; BESIII Collaboration

doi:10.1103/PhysRevLett.116.251802

Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη

M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, A. Amoroso, Z. Haddadi, N. Kalantar-Nayestanaki, M. Kavatsyuk, H. Löhner, J. G. Messchendorp, M. Tiemens, BESIII Collaboration

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Abstract

A search for radiative decays of the P-wave spin singlet charmonium resonance hc is performed based on 4.48×108 ψ′ events collected with the BESIII detector operating at the BEPCII storage ring. Events of the reaction channels hc→γη′ and γη are observed with a statistical significance of 8.4σ and 4.0σ, respectively, for the first time. The branching fractions of hc→γη′ and hc→γη are measured to be B(hc→γη′)=(1.52±0.27±0.29)×10-3 and B(hc→γη)=(4.7±1.5±1.4)×10-4, respectively, where the first errors are statistical and the second are systematic uncertainties.

Original language	English
Article number	251802
Journal	Physical Review Letters
Volume	116
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.116.251802
Publication status	Published - 21-Jun-2016

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Observation of h(c) Radiative Decay h(c)Final publisher's version, 392 KBLicence: Unspecified

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Ablikim, M., Achasov, M. N., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., Haddadi, Z., Kalantar-Nayestanaki, N., Kavatsyuk, M., Löhner, H., Messchendorp, J. G., Tiemens, M., & BESIII Collaboration (2016). Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη. Physical Review Letters, 116(25), Article 251802. https://doi.org/10.1103/PhysRevLett.116.251802

@article{9edee8170a3d4e9c90a73c48c8c9e4ae,

title = "Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη",

abstract = "A search for radiative decays of the P-wave spin singlet charmonium resonance hc is performed based on 4.48×108 ψ′ events collected with the BESIII detector operating at the BEPCII storage ring. Events of the reaction channels hc→γη′ and γη are observed with a statistical significance of 8.4σ and 4.0σ, respectively, for the first time. The branching fractions of hc→γη′ and hc→γη are measured to be B(hc→γη′)=(1.52±0.27±0.29)×10-3 and B(hc→γη)=(4.7±1.5±1.4)×10-4, respectively, where the first errors are statistical and the second are systematic uncertainties.",

author = "M. Ablikim and Achasov, {M. N.} and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and A. Amoroso and Z. Haddadi and N. Kalantar-Nayestanaki and M. Kavatsyuk and H. L{\"o}hner and Messchendorp, {J. G.} and M. Tiemens and {BESIII Collaboration}",

year = "2016",

month = jun,

day = "21",

doi = "10.1103/PhysRevLett.116.251802",

language = "English",

volume = "116",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "AMER PHYSICAL SOC",

number = "25",

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Ablikim, M, Achasov, MN, Ai, XC, Albayrak, O, Albrecht, M, Ambrose, DJ, Amoroso, A, Haddadi, Z, Kalantar-Nayestanaki, N , Kavatsyuk, M, Löhner, H, Messchendorp, JG, Tiemens, M & BESIII Collaboration 2016, 'Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη', Physical Review Letters, vol. 116, no. 25, 251802. https://doi.org/10.1103/PhysRevLett.116.251802

TY - JOUR

T1 - Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - Haddadi, Z.

AU - Kalantar-Nayestanaki, N.

AU - Kavatsyuk, M.

AU - Löhner, H.

AU - Messchendorp, J. G.

AU - Tiemens, M.

AU - BESIII Collaboration

PY - 2016/6/21

Y1 - 2016/6/21

N2 - A search for radiative decays of the P-wave spin singlet charmonium resonance hc is performed based on 4.48×108 ψ′ events collected with the BESIII detector operating at the BEPCII storage ring. Events of the reaction channels hc→γη′ and γη are observed with a statistical significance of 8.4σ and 4.0σ, respectively, for the first time. The branching fractions of hc→γη′ and hc→γη are measured to be B(hc→γη′)=(1.52±0.27±0.29)×10-3 and B(hc→γη)=(4.7±1.5±1.4)×10-4, respectively, where the first errors are statistical and the second are systematic uncertainties.

AB - A search for radiative decays of the P-wave spin singlet charmonium resonance hc is performed based on 4.48×108 ψ′ events collected with the BESIII detector operating at the BEPCII storage ring. Events of the reaction channels hc→γη′ and γη are observed with a statistical significance of 8.4σ and 4.0σ, respectively, for the first time. The branching fractions of hc→γη′ and hc→γη are measured to be B(hc→γη′)=(1.52±0.27±0.29)×10-3 and B(hc→γη)=(4.7±1.5±1.4)×10-4, respectively, where the first errors are statistical and the second are systematic uncertainties.

U2 - 10.1103/PhysRevLett.116.251802

DO - 10.1103/PhysRevLett.116.251802

M3 - Article

SN - 0031-9007

VL - 116

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 251802

ER -

Observation of hc Radiative Decay hc →γη′ and Evidence for hc →γη

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