Abulencia, A;
Acosta, D;
Adelman, J;
Affolder, T;
Akimoto, T;
Albrow, MG;
Ambrose, D;
... CDF Collaboration; + view all
(2006)
Measurement of the dipion mass spectrum in X(3872)-> J/psi pi(+)pi(-) decays.
PHYS REV LETT
, 96
(10)
, Article 102002. 10.1103/PhysRevLett.96.102002.
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Abstract
We measure the dipion mass spectrum in X(3872) -> J/psi pi(+)pi(-) decays using 360 pb(-1) of (p) over barp collisions at root s = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (S-3(1), P-1(1), and D-3(J)) charmonia decaying to J/psi pi(+)pi(-), as well as even C-parity states in which the pions are from rho(0) decay. The latter case also encompasses exotic interpretations, such as a D-0(D) over bar*(0) molecule. Only the S-3(1) and J/psi rho hypotheses are compatible with our data. Since S-3(1) is untenable on other grounds, decay via J/psi rho is favored, which implies C = +1 for the X(3872). Models for different J/psi-rho angular momenta L are considered. Flexibility in the models, especially the introduction of rho-omega interference, enables good descriptions of our data for both L = 0 and 1.
| Type: | Article |
|---|---|
| Title: | Measurement of the dipion mass spectrum in X(3872)-> J/psi pi(+)pi(-) decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.96.102002 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.96.102002 |
| Language: | English |
| Additional information: | © 2006 The American Physical Society |
| Keywords: | HADRONIC TRANSITIONS, CDF-II, DETECTOR, X(3872), UPGRADE, STATES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/136310 |
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