We report a study of the e+e−→D+D−π+π− process using e+e− collision data samples with an integrated luminosity of 2.5fb−1 at center-of-mass energies from 4.36 to 4.60 GeV, collected with the BESIII detector at the BEPCII storage ring. The D1(2420)+ is observed in the D+π+π− mass spectrum. The mass and width of the D1(2420)+ are measured to be (2427.2±1.0stat.±1.2syst.) MeV/c2 and (23.2±2.3stat.±2.3syst.) MeV, respectively. In addition, the Born cross sections of the e+e−→D1(2420)+D−+c.c.→D+D−π+π− and e+e−→ψ(3770)π+π−→D+D−π+π− processes are measured as a function of the center-of-mass energy.
|Original language||English (US)|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - May 10 2020|
Bibliographical noteFunding Information:
This work was conducted under the Strategic Research Scholarship funded by the Central Queensland University, Australia. The authors would like to acknowledge Mr. Tim Mc Sweeney, Adjunct Research Fellow at Central Queensland University, Australia for his contribution in English proof reading of this article.