HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information

# Observation and properties of the X(3872) decaying to $J/\psi \pi^+\pi^-$ in $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV

Abstract : We report the observation of the X(3872) in the J/psi pi+pi- channel, with J/psi decaying to mu+mu- in p-p(bar) collisions at sqrt(s) = 1.96 TeV. Using approximately 230 pb^-1 of data collected with the Run II D0 detector, we observe 522 +/- 100 X(3872) candidates. The mass difference between the X(3872) state and the J/psi is measured to be 774.9 +/- 3.1 (stat.) +/- 3.0 (syst.) MeV/c^2. We have investigated the production and decay characteristics of the X(3872), and find them to be similar to those of the psi(2S) state.
Document type :
Journal articles
Complete list of metadata

http://hal.in2p3.fr/in2p3-00023272
Contributor : Yvette Heyd Connect in order to contact the contributor
Submitted on : Tuesday, November 16, 2004 - 2:28:53 PM
Last modification on : Monday, March 14, 2022 - 12:04:02 PM

### Citation

V.M. Abazov, R. Abbott, M. Abolins, B.S. Acharya, D.L. Adams, et al.. Observation and properties of the X(3872) decaying to $J/\psi \pi^+\pi^-$ in $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. Physical Review Letters, American Physical Society, 2004, 93, pp.162002. ⟨10.1103/PhysRevLett.93.162002⟩. ⟨in2p3-00023272⟩

Record views