Search
Now showing items 1-10 of 42
Study of e+e- ???cJ at center of mass energies from 4.21 to 4.42 GeV
(American Physical Society, 2015)
Based on data samples collected with the BESIII detector at the BEPCII collider at nine center of mass energies from 4.21 to 4.42 GeV, we search for the production of e+e-???cJ (J=0, 1, 2). The process e+e-???c0 is observed ...
Partial-wave analysis of J /? ?k+K-?0
(American Physical Society, 2019)
A partial-wave analysis of the decay J/??K+K-?0 has been made using (223.7±1.4)×106 J/? events collected with the BESIII detector in 2009. The analysis, which is performed within the isobar-model approach, reveals contributions ...
An improved limit for ?ee of X(3872) and ?ee measurement of ?(3686)
(Elsevier, 2015)
Using the data sets taken at center-of-mass energies above 4 GeV by the BESIII detector at the BEPCII storage ring, we search for the reaction e+e-??ISRX(3872)??ISR?+?-J/? via the Initial State Radiation technique. The ...
Measurement of B(psi(3770) -> gamma chi(c1)) and search for psi(3770) -> gamma chi(c2)
(American Physical Society, 2015)
We report a measurement of the branching fraction for ?(3770)???c1 and search for the transition ?(3770)???c2 based on 2.92 fb-1 of e+e- data accumulated at s=3.773 GeV with the BESIII detector at the BEPCII collider. We ...
Measurement of the matrix elements for the decays eta -> pi(+)pi(-)pi(0) and eta/eta ' -> pi(0)pi(0)pi(0)
(American Physical Society, 2015)
Based on a sample of 1.31×109 J/? events collected with the BESIII detector at the BEPCII collider, Dalitz plot analyses of selected 79,625 ???+?-?0 events, 33,908 ???0?0?0 events, and 1,888 ????0?0?0 events are performed. ...
Observation and spin-parity determination of the X(1835) in J/? ? ?K0SK0S?
(American Physical Society, 2015)
We report an observation of the process J/? ? ?X(1835) ? ?K0SK0S? at low K0SK0S mass with a statistical significance larger than 12.9? using a data sample of 1.31 × 109 J/? events collected with the BESIII detector. In ...
Study of J/psi -> eta phi pi(+)pi(-) at BESIII
(American Physical Society, 2015)
Based on a sample of 2.25×108J/? events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay J/?????+?-. The Y(2175) resonance is observed in the invariant mass spectrum of ...
Measurement of the proton form factor by studying e+e- ?p p ¯
(American Physical Society, 2015)
Using data samples collected with the BESIII detector at the BEPCII collider, we measure the Born cross section of e+e-?pp¯ at 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective electromagnetic ...
Observation of eta ' -> omega e(+)e(-)
(American Physical Society, 2015)
Based on a sample of ?? mesons produced in the radiative decay J/????? in 1.31×109 J/? events collected with the BESIII detector, the decay ????e+e- is observed for the first time, with a statistical significance of 8?. ...
Search for the isospin violating decay Y(4260)-> J/psi eta pi(0)
(American Physical Society, 2015)
Using data samples collected at center-of-mass energies of ?s= 4.009, 4.226, 4.257, 4.358, 4.416, and 4.599 GeV with the BESIII detector operating at the BEPCII storage ring, we search for the isospin violating decay Y(4260) ...
