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Two-photon widths of the χcJ states of charmonium

Abstract:

Using a data sample of 24.5×106 ψ(2S) the reactions ψ(2S)→γχcJ, χcJ→γγ have been studied for the first time to determine the two-photon widths of the χcJ states of charmonium in their decay into two photons. The measured quantities are B(ψ(2S)→γχc0)×B(χc0→γγ)=(2. 17±0.32±0.10)×10-5 and B(ψ(2S)→γχc2) ×B(χc2→γγ)=(2.68±0.28±0.15)×10-5. Using values for B(ψ(2S)→γχc0,c2) and Γ(χc0,c2) from the literature the two-photon widths are derived to be Γγ γ(χc0)=(2.36±0.35±0.22)keV, Γγγ(χ c2)=(0.66±0.07±0....

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Publisher copy:
10.1103/PhysRevD.78.091501

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Journal:
Physical Review D More from this journal
Volume:
78
Issue:
9
Publication date:
2008-11-18
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
Language:
English
Pubs id:
pubs:161058
UUID:
uuid:a9e52606-4260-4b2f-aa05-75b96a7c06b1
Local pid:
pubs:161058
Source identifiers:
161058
Deposit date:
2013-11-16

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