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

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

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(...

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Veröffentlicht in:Physical review letters 2004, Vol.93
Hauptverfasser: Abazov, V.M., Abbott, R., Abolins, M., Acharya, B.S., Adams, D.L., Adams, M., Adams, T., Agelou, M., Agram, J.L., Ahmed, S.N., Ahn, S.H., Alexeev, G.D., Alkhazov, G., Alton, A., Alverson, G., Alves, G.A., Anderson, S., Andrieu, B., Arnoud, Y., Askew, A., Asman, B., Autermann, C., Avila, C., Babukhadia, L., Bacon, T.C., Baden, A., Baffioni, S., Baldin, B., Balm, P.W., Banerjee, S., Barberis, E., Bargassa, P., Baringer, P., Barnes, C., Barreto, J., Bartlett, J.F., Bassler, U., Bauer, D., Bean, A., Beauceron, S., Beaudette, F., Begel, M., Beri, S.B., Bernardi, G., Bertram, I., Besancon, M., Besson, A., Beuselinck, R., Bezzubov, V.A., Bhat, P.C., Bhatnagar, V., Bhattacharjee, M., Binder, M., Bischoff, A., Black, K.M., Blackler, I., Blazey, G., Blekman, F., Bloch, D., Blumenschein, U., Boehnlein, A., Boeriu, O., Bolton, T.A., Bonamy, P., Borcherding, F., Borissov, G., Bos, K., Bose, T., Boswell, C., Brandt, A., Briskin, G., Brock, R., Brooijmans, G., Bross, A., Buchholz, D., Buehler, M., Buescher, V., Burdin, S., Burnett, T.H., Busato, Emmanuel, Butler, J.M., Bystricky, J., Canelli, F., Carvalho, W., Casey, B.C.K., Cason, N.M., Castilla-Valdez, H., Chakrabarti, S., Chakraborty, D., Chan, K.M., Chandra, A., Chapin, D., Charles, F., Cheu, E., Chevalier, L., Cho, D.K., Choi, S. K., Chopra, S., Christiansen, T., Christofek, L.
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Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.93.162002