@article{3ae61c3007ac4d98a18f5eca6dd7300f,
title = "Observation of Ξ c(2930) 0 and updated measurement of B-→K-Λc+Λ¯c- at Belle: Belle Collaboration",
abstract = "We report the first observation of the Ξ c(2930) 0 charmed-strange baryon with a significance greater than 5σ. The Ξ c(2930) 0 is found in its decay to K-Λc+ in B-→K-Λc+Λ¯c- decays. The measured mass and width are [2928.9±3.0(stat.)-12.0+0.9(syst.)] MeV/c2 and [19.5±8.4(stat.)-7.9+5.9(syst.)] MeV, respectively, and the product branching fraction is B(B-→Ξc(2930)0Λ¯c-)B(Ξc(2930)0→K-Λc+)=[1.73±0.45(stat.)±0.21(syst.)]×10-4. We also measure B(B-→K-Λc+Λ¯c-)=[4.80±0.43(stat.)±0.60(syst.)]×10-4 with improved precision, and search for the charmonium-like state Y(4660) and its spin partner, Yη, in the Λc+Λ¯c- invariant mass spectrum. No clear signals of the Y(4660) nor its spin partner are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of (772 ± 11) × 10 6BB¯ pairs collected at the Υ (4 S) resonance by the Belle detector at the KEKB asymmetric energy electron–positron collider.",
author = "{The BELLE collaboration} and Li, {Y. B.} and Shen, {C. P.} and I. Adachi and Ahn, {J. K.} and H. Aihara and {Al Said}, S. and Asner, {D. M.} and T. Aushev and R. Ayad and V. Babu and I. Badhrees and Bakich, {A. M.} and Y. Ban and V. Bansal and P. Behera and M. Berger and V. Bhardwaj and B. Bhuyan and J. Biswal and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, {T. E.} and D. {\v C}ervenkov and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and K. Cho and Choi, {S. K.} and Y. Choi and D. Cinabro and S. Cunliffe and N. Dash and {Di Carlo}, S. and Z. Dole{\v z}al and Z. Dr{\'a}sal and S. Eidelman and D. Epifanov and Fast, {J. E.} and T. Ferber and Fulsom, {B. G.} and N. Gabyshev and A. Garmash and P. Krokovny and V. Shebalin and B. Shwartz and V. Vorobyev and V. Zhilich and V. Zhulanov and Кузьмин, {Александр Степанович}",
note = "Publisher Copyright: {\textcopyright} 2018, The Author(s).",
year = "2018",
month = mar,
day = "23",
doi = "10.1140/epjc/s10052-018-5720-5",
language = "English",
volume = "78",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer Nature",
number = "3",
}