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Measurement of the dipion mass spectrum in X(3872)-> J/psi pi(+)pi(-) decays

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. Green open access

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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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