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
Number of Authors: 583
2004 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 93, no 16, 162002- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2004. Vol. 93, no 16, 162002- p.
IdentifiersURN: urn:nbn:se:kth:diva-40396DOI: 10.1103/PhysRevLett.93.162002ISI: 000224533300025ScopusID: 2-s2.0-80051545276OAI: oai:DiVA.org:kth-40396DiVA: diva2:441016
QC 20110914. Author count: 5832011-09-142011-09-142012-02-02Bibliographically approved