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Observation of a Ve...
Observation of a Vector Charmoniumlike State at 4.7 GeV/c2 and Search for Zcs in e+e−→ K+K−J/ψ
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- Ablikim, M. (författare)
- Inst High Energy Phys, Beijing 100049, Peoples R China
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- Adlarson, Patrik (författare)
- Uppsala universitet,Kärnfysik
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- Johansson, Tord (författare)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (författare)
- Uppsala universitet,Kärnfysik,Natl Ctr Nucl Res, PL-02093 Warsaw, Poland
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- Schönning, Karin, 1978- (författare)
- Uppsala universitet,Kärnfysik
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- Thorén, Viktor (författare)
- Uppsala universitet,Kärnfysik
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- Wolke, Magnus (författare)
- Uppsala universitet,Kärnfysik
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- Zu, J. (författare)
- State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China;State Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China;Univ Sci & Technol China, Hefei 230026, Peoples R China
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(creator_code:org_t)
- American Physical Society, 2023
- 2023
- Engelska.
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Ingår i: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 131:21
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Using data samples with an integrated luminosity of 5.85 fb−1 collected at center-of-mass energies from 4.61 to 4.95 GeV with the BESIII detector operating at the BEPCII storage ring, we measure the cross section for the process e+e−→K+K−J/ψ. A new resonance with a mass of M=4708+17−15±21 MeV/c2 and a width of Γ=126+27−23±30 MeV is observed in the energy-dependent line shape of the e+e−→K+K−J/ψ cross section with a significance over 5σ. The K+J/ψ system is also investigated to search for charged charmoniumlike states, but no significant Z+cs states are observed. Upper limits on the Born cross sections for e+e−→K−Zcs(3985)+/K−Zcs(4000)++c.c. with Zcs(3985)±/Zcs(4000)±→K±J/ψ are reported at 90% confidence levels. The ratio of branching fractions {[B(Zcs(3985)+→K+J/ψ)]/B[Zcs(3985)+→(¯D0D*+s+¯D*0D+s)]} is measured to be less than 0.03 at 90% confidence level.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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