We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λc^+ →Λπ^+, Σ^0π^+, pK0, Ξ0c →Ξ-π+and Ω^0c →Ω^-π^+. The joint angular formulae for...We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λc^+ →Λπ^+, Σ^0π^+, pK0, Ξ0c →Ξ-π+and Ω^0c →Ω^-π^+. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in e^+e^-annihilation data. Base on the currentΛ+c data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters αΛπ+forΛ+c →Λπ+, αΣ+π0for Λc^+ →Σ+π^0 and αΣ0π+for Λc^+ →Σ^0π^+.展开更多
While indirect and direct C P violation(CPV) has been established in the decays of strange and beauty mesons, no CPV has yet been found for baryons. There are different paths to finding C P asymmetry in the decays o...While indirect and direct C P violation(CPV) has been established in the decays of strange and beauty mesons, no CPV has yet been found for baryons. There are different paths to finding C P asymmetry in the decays of strange baryons; they are all highly non-trivial. The Hyper CP Collaboration has probed CPV in the decays of singleΞ and Λ [1]. We discuss future lessons from e~+e^-collisions at BESⅢ/BEPCⅡ: probing decays of pairs of strange baryons, namely Λ, Σ and . Realistic goals are to learn about non-perturbative QCD. One can hope to find CPV in the decays of strange baryons; one can also dream of finding the impact of New Dynamics. We point out that an important new era will start with the BESIII/BEPCII data accumulated by the end of 2018. This also supports new ideas to trigger J/ψ→■Λ at the LHCb collaboration.展开更多
基金Supported by National Natural Science Foundation of China(11375205,11175146,11275266,11235011,11425524,11505010,11565006)Beijing Municipal Government Foundation(KM201610017009,2015000020124G064)Youth Innovation Promotion Association of CAS
文摘We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λc^+ →Λπ^+, Σ^0π^+, pK0, Ξ0c →Ξ-π+and Ω^0c →Ω^-π^+. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in e^+e^-annihilation data. Base on the currentΛ+c data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters αΛπ+forΛ+c →Λπ+, αΣ+π0for Λc^+ →Σ+π^0 and αΣ0π+for Λc^+ →Σ^0π^+.
基金Supported by National Science Foundation(PHY-1520966)National Natural Science Foundation of China(11335009,11125525)+3 种基金Joint Large-Scale Scientific Facility Funds of the NSFC and CAS(U1532257)the National Key Basic Research Program of China(2015CB856700)Key Research Program of Frontier Sciences,CAS,(QYZDJ-SSW-SLH003)XWK’s work is also supported by MOST(Taiwan)(104-2112-M-001-022)
文摘While indirect and direct C P violation(CPV) has been established in the decays of strange and beauty mesons, no CPV has yet been found for baryons. There are different paths to finding C P asymmetry in the decays of strange baryons; they are all highly non-trivial. The Hyper CP Collaboration has probed CPV in the decays of singleΞ and Λ [1]. We discuss future lessons from e~+e^-collisions at BESⅢ/BEPCⅡ: probing decays of pairs of strange baryons, namely Λ, Σ and . Realistic goals are to learn about non-perturbative QCD. One can hope to find CPV in the decays of strange baryons; one can also dream of finding the impact of New Dynamics. We point out that an important new era will start with the BESIII/BEPCII data accumulated by the end of 2018. This also supports new ideas to trigger J/ψ→■Λ at the LHCb collaboration.
基金supported by the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japanthe Japan Society for the Promotion of Science (JSPS)+29 种基金the Tau-Lepton Physics Research Center of Nagoya Universitythe Australian Research Council including grants DP180102629, DP170102389, DP170102204, DE220100462, DP150103061, FT130100303Austrian Federal Ministry of Education, Science and Research (FWF) and FWF Austrian Science Fund No. P 31361-N36the National Natural Science Foundation of China under Contracts No. 11675166, No. 11705209No. 11805064No. 11975076No. 12135005No. 12175041No. 12161141008Key Research Program of Frontier Sciences, Chinese Academy of Sciencess (CAS), Grant No. QYZDJ-SSW-SLH011the Shanghai Science and Technology Committee (STCSM) under Grant No. 19ZR1403000the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LTT17020the Czech Science Foundation Grant No. 22-18469SHorizon 2020 ERC Advanced Grant No. 884719 and ERC Starting Grant No. 947006 ‘‘Inter Leptons” (European Union)the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the Volkswagen Stiftungthe Department of Atomic Energy (Project Identification No. RTI 4002)the Department of Science and Technology of Indiathe Istituto Nazionale di Fisica Nucleare of ItalyNational Research Foundation (NRF) of Korea Grant Nos. 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1A6A1A060 24970, RS202200197659, 2019R1I1A3A01058933, 2021R1A6A1A03043957, 2021R1F1A1060423, 2021R1F1A1064008, 2022R1A2C 1003993Radiation Science Research Institute, Foreign Large-size Research Facility Application Supporting projectthe Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information and KREONET/GLORIADthe Polish Ministry of Science and Higher Education and the National Science Centerthe Ministry of Science and Higher Education of the Russian Federation, Agreement 14.W03.31.0026the HSE University Basic Research Program, MoscowUniversity of Tabuk research grants S-1440-0321, S-0256-1438, and S-0280-1439 (Saudi Arabia)the Slovenian Research Agency Grant Nos. J19124 and P1-0135Ikerbasque, Basque Foundation for Science, Spainthe Swiss National Science Foundationthe Ministry of Education and the Ministry of Science and Technology of Taiwanthe United States Department of Energy and the National Science Foundation。