Based on e+e− annihilation data samples collected with the BESIII detector at the BEPCII collider at 13 center-of-mass energies from 4.008 to 4.600 GeV, measurements of the Born cross section of e+e−→pp¯π0 are performed. No significant resonant structure is observed in the measured energy dependence of the cross section. The upper limit on the Born cross section of e+e−→Y(4260)→pp¯π0 at the 90% C.L. is determined to be 0.01 pb. The upper limit on the ratio of the branching fractions [Formula presented] at the 90% C.L. is determined to be 0.02%.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Aug 10 2017|
Bibliographical noteFunding Information:
The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700 ; National Natural Science Foundation of China (NSFC) under Contracts Nos. 11235011 , 11305178 , 11322544 , 11335008 , 11375204 , 11425524 , 11635010 ; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program ; the CAS Center for Excellence in Particle Physics (CCEPP) ; the Collaborative Innovation Center for Particles and Interactions (CICPI) ; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts Nos. U1232201 , U1332201 , U1532257 , U1532258 ; CAS under Contracts Nos. KJCX2-YW-N29 , KJCX2-YW-N45 ; 100 Talents Program of CAS ; National 1000 Talents Program of China ; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology ; German Research Foundation DFG under Contracts Nos. Collaborative Research Center CRC 1044 , FOR 2359 ; Istituto Nazionale di Fisica Nucleare , Italy; Koninklijke Nederlandse Akademie van Wetenschappen ( KNAW ) under Contract No. 530-4CDP03 ; Ministry of Development of Turkey under Contract No. DPT2006K-120470 ; The Swedish Resarch Council ; U. S. Department of Energy under Contracts Nos. DE-FG02-05ER41374 , DE-SC-0010504 , DE-SC0010118 , DE-SC0012069 ; U.S. National Science Foundation ; University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt ; WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000-10155-0 .
- Cross section measurements