Measurement of the mass and width of the Λc(2625)+ charmed baryon and the branching ratios of Λc(2625)+→Σc0π+ and Λc(2625)+→Σc++π−
Measurement of the mass and width of the Λc(2625)+ charmed baryon and the branching ratios of Λc(2625)+→Σc0π+ and Λc(2625)+→Σc++π−
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测量 δc(2625) 粲重子的质量和宽度以及 δc(2625) - δc0δ 和 δc(2625) - δc δ 的分支比
DOI：
10.1103/physrevd.107.032008
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发表时间：
2023
影响因子：
5
通讯作者：
Banerjee, Sw.
中科院分区：
文献类型：
--
作者：
Wang, D.;Yelton, J.;Adachi, I.;Ahn, J. K.;Aihara, H.;Asner, D. M.;Atmacan, H.;Ayad, R.;Babu, V.;Banerjee, Sw.
本文利用在KEKB非对称能量对撞机上运行的贝儿探测器在~（4S）共振处或附近收集的全部数据样本，测量了碰撞重子的质量、宽度和分支比。与的质量差为M（~（2625）+）-M（~（2625）+）=341.518±0.006±0.049 MeV/c ~ 2。宽度的上限被测量为超过90%的置信水平。基于完全Dalitz图拟合，测量到关于模式的分支比为B（Λc（2625）+→ Δ c+ π+）B（Λc（2625）+→Λc+π+π-）=（5.19±0.23±0.40）%和B（Λc（2625）+→ Δ c +π-）B（Λc（2625）+ → Λc+π+π-）=（5.13±0.26±0.32）%，其中第一和第二不确定度分别是统计的和系统的。这些测量可以用于进一步约束基础理论模型的参数。
Using the entire data sample ofcollected at or near the ϒ(4S) resonance with the Belle detector operating at the KEKB asymmetric-energycollider, we report the measurement of the mass, width, and the branching ratios of thecharmed baryon. The mass difference betweenandis measured to be M(Λc(2625)+)-M(Λc+)=341.518±0.006±0.049 MeV/c2. The upper limit on the width is measured to beat 90% confidence level. Based on a full Dalitz plot fit, branching ratios with respect to the modeare measured to be B(Λc(2625)+→Σc0π+)B(Λc(2625)+→Λc+π+π-)=(5.19±0.23±0.40)% and B(Λc(2625)+→Σc++π-)B(Λc(2625)+→Λc+π+π-)=(5.13±0.26±0.32)%, where the first and second uncertainties are statistical and systematic, respectively. These measurements can be used to further constrain the parameters of the underlying theoretical models.