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Study of electromag...
Study of electromagnetic Dalitz decays chi(cJ )-> mu(+)mu(-) J/psi
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- Ablikim, M. (author)
- Institute of High Energy Physics, Beijing 100049, People’s Republic of China
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- Andersson, Walter Ikegami (author)
- Uppsala universitet,Kärnfysik
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- Johansson, Tord (author)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (author)
- Uppsala universitet,Kärnfysik
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- Li, Cui, 1984- (author)
- Uppsala universitet,Kärnfysik
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- Papenbrock, Michael (author)
- Uppsala universitet,Kärnfysik
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- Pettersson, Joachim (author)
- Uppsala universitet,Kärnfysik
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- Schönning, Karin, 1978- (author)
- Uppsala universitet,Kärnfysik
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- Wolke, Magnus (author)
- Uppsala universitet,Kärnfysik
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- Zou, J. H. (author)
- Institute of High Energy Physics, Beijing 100049, People’s Republic of China
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(creator_code:org_t)
- 2019
- 2019
- English.
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In: Physical Review D. - 2470-0010 .- 2470-0029. ; 99:5
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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Abstract
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- Using 4.48 x 10(8) psi(3686) events collected with the BESIII detector, we search for the decays chi(cJ) ->mu(+)mu(- )J/psi through the radiative decays psi(3686) -> gamma chi(cJ), where J = 0, 1, 2. The decays chi(c1,2) -> mu(+)mu(-)J/psi are observed, and the corresponding branching fractions arc measured to be B(chi(c1) -> mu(+)mu(-) J/psi) = (2.51 +/- 0.18 +/- 0.20) x 10(-4) and B(chi(c2 )-> mu(+)mu(- )J/psi) = (2.33 +/- 0.18 +/- 0.29) x 10(-4), where the first uncertainty is statistical and the second one systematic. No significant chi(c0 )-> mu(+)mu(- )J/psi decay is observed, and the upper limit on the branching fraction is determined to be 2.0 x 10(-5) at 90% confidence level. Also, we present a study of dimuon invariant mass dependent transition form factor for the decays chi(c1,2 )->mu(+)mu(- )J/psi.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Ablikim, M.
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Andersson, Walte ...
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Johansson, Tord
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Kupsc, Andrzej
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Li, Cui, 1984-
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Papenbrock, Mich ...
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show more...
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Pettersson, Joac ...
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Schönning, Karin ...
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Wolke, Magnus
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Zou, J. H.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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Physical Review ...
- By the university
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Uppsala University