Title
Measurement of the dipion mass spectrum in <tex>$X(3872)\rightarrow J/\psi\pi^{+}\pi^{-}$</tex> decays Measurement of the dipion mass spectrum in <tex>$X(3872)\rightarrow J/\psi\pi^{+}\pi^{-}$</tex> decays
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
96(2006) :10 , p. 102002,1-102002,7
ISSN
0031-9007
ISI
000236062800017
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We measure the dipion mass spectrum in X(3872)→J/ψπ+π- decays using 360   pb-1 of p&#773; p collisions at √s=1.96   TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (3S1, 1P1, and 3DJ) charmonia decaying to J/ψπ+π-, as well as even C-parity states in which the pions are from ρ0 decay. The latter case also encompasses exotic interpretations, such as a D0D&#773; *0 molecule. Only the 3S1 and J/ψρ hypotheses are compatible with our data. Since 3S1 is untenable on other grounds, decay via J/ψρ is favored, which implies C=+1 for the X(3872). Models for different J/ψ-ρ angular momenta L are considered. Flexibility in the models, especially the introduction of ρ-ω interference, enables good descriptions of our data for both L=0 and 1.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/5291b8/f5381531.pdf
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