助力巴西圣保罗垃圾车成立于2004年的Solví集团收购了众多公共环卫服务公司,旗下Vega Engenharia Ambiental、Revita和Loga(公司全称Logística Ambiental de So Paulo S.A.)等40余家子公司遍布巴西、秘鲁、阿根廷和玻利...助力巴西圣保罗垃圾车成立于2004年的Solví集团收购了众多公共环卫服务公司,旗下Vega Engenharia Ambiental、Revita和Loga(公司全称Logística Ambiental de So Paulo S.A.)等40余家子公司遍布巴西、秘鲁、阿根廷和玻利维亚。1997年,Loga公司购买了50辆装配艾里逊变速箱的GMC 16.220卡车,并由此开始了Solví集团与艾里逊变速箱公司持续近15年的良好合作。到今年年底,Loga公司车队150辆压缩垃圾车将全部装配艾里逊自动变速箱。展开更多
In this work, we calculate the mass spectrum of doubly heavy baryons with the diquaxk model in terms of the QCD sum rules. The interpolating currents are composed of a heavy diquaxk field and a light quark field. Cont...In this work, we calculate the mass spectrum of doubly heavy baryons with the diquaxk model in terms of the QCD sum rules. The interpolating currents are composed of a heavy diquaxk field and a light quark field. Contributions of the operators up to dimension six are taken into account in the operator product expansion. Within a reasonable error tolerance, our numerical results axe compatible with other theoretical predictions. This indicates that the diquaxk picture reflects the reality and is applicable to the study of doubly heavy baryons.展开更多
文摘助力巴西圣保罗垃圾车成立于2004年的Solví集团收购了众多公共环卫服务公司,旗下Vega Engenharia Ambiental、Revita和Loga(公司全称Logística Ambiental de So Paulo S.A.)等40余家子公司遍布巴西、秘鲁、阿根廷和玻利维亚。1997年,Loga公司购买了50辆装配艾里逊变速箱的GMC 16.220卡车,并由此开始了Solví集团与艾里逊变速箱公司持续近15年的良好合作。到今年年底,Loga公司车队150辆压缩垃圾车将全部装配艾里逊自动变速箱。
基金Supported by the National Natural Science Foundation of China (NSFC)by the CAS Key Projects KJCX2-yw-N29 and H92A0200S2
文摘In this work, we calculate the mass spectrum of doubly heavy baryons with the diquaxk model in terms of the QCD sum rules. The interpolating currents are composed of a heavy diquaxk field and a light quark field. Contributions of the operators up to dimension six are taken into account in the operator product expansion. Within a reasonable error tolerance, our numerical results axe compatible with other theoretical predictions. This indicates that the diquaxk picture reflects the reality and is applicable to the study of doubly heavy baryons.