Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the O_{c}^{0} Baryon.
Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the O_{c}^{0} Baryon.
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卡比博抑制的二体强子衰变观测和 O_{c}^{0} 重子的精密质量测量。
DOI：
10.1103/physrevlett.132.081802
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发表时间：
2024
影响因子：
8.6
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
报告了对单一Cabibbo抑制和衰变的首次观测，使用质心能量为13 TeV的质子-质子碰撞数据，对应于2016年至2018年期间LHCb探测器收集的积分光度。测得分支分数比为B（Ω c 0 →Ω-K+）B（Ω c 0 →Ω-π+）=[6.08±0.51（stat）±0.40（syst）]%，B（Ω c 0 → Ω-π+）B（Ω c 0 → Ω-π+）=[15.81±0.87（stat）±0.44（syst）±0.16（ext）]%。此外，利用衰变道测得的重子质量为M（Ω c 0）=2695.28±0.07（stat）±0.27（syst）±0.30（ext）MeV，比以前的世界平均值精度提高了4倍。
The first observation of the singly Cabibbo-suppressedanddecays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(Ωc0→Ω-K+)B(Ωc0→Ω-π+)=[6.08±0.51(stat)±0.40(syst)]%,B(Ωc0→Ξ-π+)B(Ωc0→Ω-π+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using thedecay channel, thebaryon mass is measured to be M(Ωc0)=2695.28±0.07(stat)±0.27(syst)±0.30(ext) MeV, improving the precision of the previous world average by a factor of 4.