Details

Autor(en) / Beteiligte

• Abazov, V. M.
• Åsman, Barbro
• Clément, Christophe
• Strandberg, Jonas
• Zylberstejn, A.
• et al

Titel

Observation and properties of the X(3872) decaying to J/psi pi(+)pi(-) in p(p)over-bar collisions at root s=1.96 TeV

Ist Teil von

• Physical review letters, 2004-10, Vol.93 (16), p.162002

Erscheinungsjahr

2004

Link zum Volltext

Quelle

APS_美国物理学会过刊

Beschreibungen/Notizen

• We report the observation of the X(3872) in the J/psipi(+)pi(-) channel, with J/psi decaying to mu(+)mu(-), in p (p) over bar collisions at roots=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.