【摘 要】
：
A search for the doubly charmed baryon Ω+cc with the decay mode Ω+cc→ Ξ+c K-π+ is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment from 2016 to 2018,corresponding to an integrated luminosit
【出 处】
：
中国科学：物理学 力学 天文学（英文版）
论文部分内容阅读
A search for the doubly charmed baryon Ω+cc with the decay mode Ω+cc→ Ξ+c K-π+ is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment from 2016 to 2018,corresponding to an integrated luminosity of 5.4fb-1.No significant signal is observed within the invariant mass range of 3.6 to 4.0GeV/c2.Upper limits are set on the ratio R of the production cross-section times the total branching fraction of the Ω+cc → Ξ+cK-π+decay with respect to the Ξ++cc→Λ+c+K-π+π+ decay.Upper limits at 95％credibility level for R in the range 0.005 to 0.11 are obtained for different hypotheses on the Ω+cc mass and lifetime in the rapidity range from 2.0 to 4.5 and transverse momentum range from 4 to 15 GeV/c.
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