Search for the doubly charmed baryon ■
被引量:2
摘要
A search for the doubly charmed baryon ■^+cc is performed through its decay to theΛ^+c K^-π^+ final state,using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7,8 and 13 TeV.The data correspond to a total integrated luminosity of 9 fb^-1.No significant signal is observed in the mass range from 3.4 to 3.8 GeV/c^2.Upper limits are set at 95%credibility level on the ratio of the ■^+cc production cross-section times the branching fraction to that ofΛ^+c and ■^++cc baryons.The limits are determined as functions of the ■^+cc mass for different lifetime hypotheses,in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 4 to 15 GeV/c.
A search for the doubly charmed baryon Ξcc+ is performed through its decay to the Λc+K-π+ final state, using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 Te V. The data correspond to a total integrated luminosity of 9 fb-1. No significant signal is observed in the mass range from 3.4 to 3.8 Ge V/c2. Upper limits are set at 95% credibility level on the ratio of the Ξcc+ production cross-section times the branching fraction to that of Λc+ and Ξcc++ baryons. The limits are determined as functions of the Ξcc+ mass for different lifetime hypotheses, in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 4 to 15 GeV/c.
基金
support from CERN and from the national agencies:CAPES,CNPq,FAPERJ and FINEP(Brazil)
MOST and NSFC(China)
CNRS/IN2P3(France)
BMBF,DFG and MPG(Germany)
INFN(Italy)
KWO(Netherlands)
MNiSW and NCN(Poland)
MEN/IFA(Romania)
MinES and FASO(Russia)
MinECo(Spain)
SNSF and SER(Switzerland)
NASU(Ukraine)
STFC(United Kingdom)
NSF(USA).
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