Using 2917pb -1 of data accumulated at 3.773GeV, 44.5pb -1 of data accumulated at 3.65GeV and data accumulated during a ψ(3770) line-shape scan with the BESIII detector, the reaction e+e-→pp- is studied considering a possible interference between resonant and continuum amplitudes. The cross section of e+e-→ψ(3770)→pp-, σ(e+e-→ψ(3770)→pp-), is found to have two solutions, determined to be (0.059-0.020+0.070±0.012)pb with the phase angle φ=(255.8-26.6+39.0±4.8)° (<0.166pb at the 90% confidence level), or σ(e+e-→ψ(3770)→pp-)=(2.57-0.13+0.12±0.12)pb with φ=(266.9-6.3+6.1±0.9)° both of which agree with a destructive interference. Using the obtained cross section of ψ(3770)→pp-, the cross section of pp-→ψ(3770), which is useful information for the future PANDA experiment, is estimated to be either (9.8-3.9+11.8)nb (<27.5nb at 90% C.L.) or (425.6-43.7+42.9)nb.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Jul 30 2014|
Bibliographical noteFunding Information:
The BESIII Collaboration thanks the staff of BEPCII and the computing center for their strong support. This work is supported in part by the Ministry of Science and Technology of China under Contract No. 2009CB825200 ; Joint Funds of the National Natural Science Foundation of China under Contracts Nos. 11079008 , 11179007 , U1332201 ; National Natural Science Foundation of China (NSFC) under Contracts Nos. 10625524 , 10821063 , 10825524 , 10835001 , 10935007 , 11125525 , 11235011 ; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS under Contracts Nos. KJCX2-YW-N29 , KJCX2-YW-N45 ; 100 Talents Program of CAS; German Research Foundation DFG under Contract No. Collaborative Research Center CRC-1044 ; Istituto Nazionale di Fisica Nucleare , Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470 ; U.S. Department of Energy under Contracts Nos. DE-FG02-04ER41291 , DE-FG02-05ER41374 , DE-FG02-94ER40823 , DESC0010118 ; 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 .
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