We propose that the X(3915)observed in the J/w channel is the same state as the Xe2(3930),and the X(3960),observed in the D,D,channel,is an S-wave D,D,hadronic molecule.In addition,the jpC=0^(++)component in the B^(+)...We propose that the X(3915)observed in the J/w channel is the same state as the Xe2(3930),and the X(3960),observed in the D,D,channel,is an S-wave D,D,hadronic molecule.In addition,the jpC=0^(++)component in the B^(+)→D^(+)D K^(+)assigned to the X(3915)in the current Review of Particle Physics has the same origin as the X(3960),which has a mass around 3.94 GeV.To check the proposal,the available data in the DD and D,D,channels from both B decays andγγfusion reaction are analyzed considering both the DD-D,D,-D'D'-D,D,coupled channels with o^(++)and a 2^(++)state introduced additionally.It is found that all the data in different processes can be simultaneously well reproduced,and the coupled-channel dynamics produce four hidden-charm scalar molecular states with masses around 3.73,3.94,3.99 and 4.23 Gev,respectively.The results may deepen our understanding of the spectrum of charmonia as well as of the interactions between charmed hadrons.展开更多
The production of the X（3872） as a hadronic molecule in hadron colliders is clarified. We show that the conclusion of Bignamini et al., Phys. Rev. Lett. 103（2009） 162001, that the production of the X（3872） at hi...The production of the X（3872） as a hadronic molecule in hadron colliders is clarified. We show that the conclusion of Bignamini et al., Phys. Rev. Lett. 103（2009） 162001, that the production of the X（3872） at high pT implies a non-molecular structure, does not hold. In particular, using the well understood properties of the deuteron wave function as an example, we identify the relevant scales in the production process.展开更多
基金supported by the Spanish Ministerio de Ciencia e Innovación(MICINN)and the European Regional Development Fund(ERDF)under Contract PID2020-112777 GB-I00by the EU STRONG-2020 Project under the Program H2020-INFRAIA-2018–1 with Grant Agreement No.824093+4 种基金by Generalitat Valenciana under Contract PROMETEO/2020/023by the Chinese Academy of Sciences under Grant No.XDB34030000by the National Natural Science Foundation of China(NSFC)under Grants No.12125507,No.11835015,No.12047503,and No.11961141012by the NSFC and the Deutsche Forschungsgemeinschaft(DFG)through the funds provided to the Sino-German Collaborative Research Center TRR110“Symmetries and the Emergence of Structure in QCD”(NSFC Grant No.12070131001,DFG Project-ID 196253076)M.A.is supported by Generalitat Valenciana under Grant No.CIDEGENT/2020/002.
文摘We propose that the X(3915)observed in the J/w channel is the same state as the Xe2(3930),and the X(3960),observed in the D,D,channel,is an S-wave D,D,hadronic molecule.In addition,the jpC=0^(++)component in the B^(+)→D^(+)D K^(+)assigned to the X(3915)in the current Review of Particle Physics has the same origin as the X(3960),which has a mass around 3.94 GeV.To check the proposal,the available data in the DD and D,D,channels from both B decays andγγfusion reaction are analyzed considering both the DD-D,D,-D'D'-D,D,coupled channels with o^(++)and a 2^(++)state introduced additionally.It is found that all the data in different processes can be simultaneously well reproduced,and the coupled-channel dynamics produce four hidden-charm scalar molecular states with masses around 3.73,3.94,3.99 and 4.23 Gev,respectively.The results may deepen our understanding of the spectrum of charmonia as well as of the interactions between charmed hadrons.
基金Supported by DFG and NSFC through funds provided to the Sino-German CRC 110 “Symmetries and the Emergence of Structure in QCD”(NSFC(11621131001)DFG(TRR110))+4 种基金by NSFC(11647601)by the CAS Key Research Program of Frontier Sciences(QYZDBSSW-SYS013)by the Thousand Talents Plan for Young Professionalsby the CAS President’s International Fellowship Initiative(PIFI)(2017VMA0025)by Spanish Ministerio de Economía y Competitividad and European FEDER under contracts FIS2014-51948-C2-1-P and SEV-2014-0398
文摘The production of the X（3872） as a hadronic molecule in hadron colliders is clarified. We show that the conclusion of Bignamini et al., Phys. Rev. Lett. 103（2009） 162001, that the production of the X（3872） at high pT implies a non-molecular structure, does not hold. In particular, using the well understood properties of the deuteron wave function as an example, we identify the relevant scales in the production process.
