We report first measurements of e+e- → D (*)+ D(*)- processes far above threshold. The cross sections for e+ e- → DT* + DT*- and e+ e- → D+ DT*- at √s ≃ 10.6 GeV/c2 are measured to be 0.55 ± 0.03 ± 0.05 and 0.62 ± 0.03 ± 0.06 pb, respectively. We set upper limits on the cross sections for e+e- → DT*+ DT*-, e+ e- → D L*+ DL*-, e+ e- → DL*+ DL* -, and e+ e- → D+ D -* processes. The analysis is based on 88.9 fb-1 of data collected by the Belle experiment at the KEKB e+e- asymmetric collider.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2004 Oct|
Bibliographical noteFunding Information:
We are grateful to A. G. Grozin for useful discussions and comments on theoretical issues. We thank the KEKB group for the excellent operation of the accelerator, the KEK Cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the NII for valuable computing and Super-SINET network support. We acknowledge support from MEXT and JSPS (Japan); ARC and DEST (Australia); NSFC (Contract No. 10175071, China); DST (India); the BK21 program of MOEHRD and the CHEP SRC program of KOSEF (Korea); KBN (Contract No. 2P03B 01324, Poland); MIST (Russia); MESS (Slovenia); NSC and MOE (Taiwan); and DOE (U.S.A.).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)