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Precision Measurement of the X(3872) Mass in J/?p+p- Decays

Aaltonen T.
•
Adelman J.
•
Akimoto T.
altro
Zucchelli S.
2009
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We present an analysis of the mass of the X(3872) reconstructed via its decay to J/ψπ+π- using 2.4 fb-1 of integrated luminosity from pp̅ collisions at √s=1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass states is investigated. Within the limits of our experimental resolution the data are consistent with a single state, and having no evidence for two states we set upper limits on the mass difference between two hypothetical states for different assumed ratios of contributions to the observed peak. For equal contributions, the 95% confidence level upper limit on the mass difference is 3.6 MeV/c2. Under the single-state model the X(3872) mass is measured to be 3871.61±0.16(stat)±0.19(syst) MeV/c2, which is the most precise determination to date.
DOI
10.1103/PhysRevLett.103.152001
WOS
WOS:000270672100011
Archivio
http://hdl.handle.net/11390/878961
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-70349767106
http://link.aps.org/doi/10.1103/PhysRevLett.103.152001
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Scopus© citazioni
77
Data di acquisizione
Jun 14, 2022
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Web of Science© citazioni
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Data di acquisizione
Mar 21, 2024
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Data di acquisizione
Apr 19, 2024
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